That leaves the Diamondbacks with seven starters for five spots: Burnes, Zac Gallen, Merrill Kelly, Eduardo Rodriguez, Brandon Pfaadt, Jordan Montgomery and Ryne Nelson. The first four are largely locked into place. Burnes and Gallen are Cy Young-caliber arms when healthy. Kelly has been a steady midrotation arm for the Snakes since signing out of the KBO in the 2018-19 offseason. Rodriguez’s first year in Arizona was marred by injury, but he’s signed three more years and has a lengthy track record.

Montgomery’s status in Arizona has been a talking point throughout the winter. The Diamondbacks signed him to a one-year, $25MM contract with a vesting $20MM player option for the 2025 season. The left-hander pitched enough to trigger that option but nowhere near well enough to decline it in favor of a return to the open market. Signing just days before Opening Day last season, Montgomery missed spring training, rushed through an accelerated ramp-up in Triple-A and never appeared to be himself. He pitched 117 innings but was rocked for a 6.23 earned run average with career-worst walk and strikeout rates.

D-backs owner Ken Kendrick called Montgomery’s performance out late in the season, publicly lamenting the role that he’d played in bringing the left-hander to his organization. “I brought it to (the front office’s) attention. I pushed for it,” Kendrick said in September. “They agreed to it. It wasn’t in our game plan. … And looking back, in hindsight, a horrible decision to have invested that money in a guy that performed as poorly as he did.”

Pfaadt, 26, would give the D-backs an upside arm at the back of the staff. The former top prospect hasn’t yet found his stride over a full big league season but has shown glimpses of the potential that made him so well regarded. He looked to have found his stride last year, logging a 3.98 ERA, 23% strikeout rate and 4.9% walk rate through his first 24 starts, but Pfaadt was hit hard in late August and for much of September. He mixed in one late-season gem — seven innings, one run, 12 strikeouts in Milwaukee — but even with that showing still posted an ERA north of 7.00 over his final eight starts. He finished the year at a 4.71 mark but did pile up 181 2/3 innings.

Nelson, who turned 27 in December, made 27 appearances this past season — 25 of them starts — and recorded 150 2/3 innings of 4.24 ERA ball. His 20% strikeout rate and 8.4% swinging-strike rate were below average (well below, with regard to the latter), but Nelson’s 5.4% walk rate was outstanding.

There are other options on the 40-man roster, but they’re likely to be viewed as depth candidates, barring a spring breakout. Yilber Diaz, Cristian Mena, Tommy Henry and Blake Walston are all on the 40-man roster and have all made their big league debuts, but they’d likely only be called upon in the event of multiple injuries — at least with the current roster construction.

Kendrick’s comments on Montgomery led to plenty of speculation about a potential trade of this winter, but no such deal has come to fruition. It’s still possible the D-backs could find a taker for a portion of the contract or swap him out for a comparably priced veteran on an underwater deal (e.g. Rhys Hoskins, Starling Marte), but for now, Montgomery will get a full spring buildup and look to bounce back from a dismal 2024 season.

If the D-backs can find some kind of trade that sheds a portion of the Montgomery money, any savings could be reallocated to other needs. Most notably, they’ve been in the market for a closer throughout the winter but have yet to add an established ninth-inning arm. Arizona’s payroll is projected for a franchise-record $195MM, per RosterResource. It’s not clear whether Kendrick is willing to push things further after already ponying up to sign Burnes (six years, $210MM), acquire Josh Naylor in a trade (one year, $10.9MM) and re-sign Randal Grichuk (one year, $5MM). Barring the signing of a veteran like David Robertson or Kyle Finnegan, the D-backs will look inward and lean on A.J. Puk, Justin Martinez and Kevin Ginkel as their top late-inning arms.

According to Piecoro, no “other deals [are] lined up or even close” involving Arizona’s pitchers, as the Diamondbacks will continue to take a measured view of the market.  A source tells Piecoro that the D’Backs will likely “spend the coming days fielding calls from teams still in the hunt for starters, including those that were in on Burnes.”  The D’Backs aren’t in any particular rush to complete a trade any time soon, as having more than a full rotation in place before New Year’s Eve gives the club plenty of time to figure out the best possible offer.

It also isn’t entirely out of the question that the Diamondbacks stand pat on their starters, especially if an injury emerges to a starter during their offseason training, or during Spring Training.  Kelly, Rodriguez, and Montgomery all missed significant time with injuries last season, so there is obvious value in having extra pitchers on hand should any more health issues create openings in the rotation.  Operating with a six-man rotation is also a possibility, in order to keep everyone healthy and fresh for what the D’Backs hope can be an extended run through the playoffs.

Given how the Burnes deal reportedly came together just within the last week when Burnes himself approached the D’Backs, it isn’t surprising that the signing wasn’t part of an immediate plan to re-model the pitching staff.  Such two-step transactions are usually hard to pull off, though the Diamondbacks were part of such a set of moves from the Guardians just last week — Arizona acquired Josh Naylor from the Guards, and Cleveland then signed Carlos Santana that same day to immediately fill Naylor’s spot as the everyday first baseman.

The fact that Burnes signed with a team that was seemingly already set for starting pitching gives GM Mike Hazen even more leverage in shopping his hurlers.  Such known Burnes suitors like the Orioles, Blue Jays, or Giants are still in need of pitching, to say nothing of the many other starter-needy clubs on the market that weren’t willing or able to meet Burnes’ asking price.

Nothing seems to have changed in terms of which starters are most prominently on Arizona’s trade block.  Gallen and Kelly are both free agents next winter but don’t seem likely to be dealt, as a team source told Piecoro that the team’s focus in on “trying to put the best team on the field in 2025.”  Nelson is controlled through the 2027 season and Pfaadt through the 2029 season, so the Diamondbacks would probably only move either if a longer-term asset (likely a position player) could be obtained in return.  The D’Backs might not mind moving the $66MM remaining on Rodriguez’s contract, but the club would certainly have to sell low and eat some of that money in the wake of E-Rod’s injury-plagued down year.

That leaves Montgomery as still the chief candidate to be dealt before Opening Day.  Montgomery’s trade value is also at a low ebb after his rough first year in Arizona, and his $22.5MM salary for the 2025 season.  Owner Ken Kendrick’s public criticism of Montgomery following the season only increased the probability that the left-hander would be pitching elsewhere next year, yet again, the Burnes signing gives the D’Backs some flexibility in this regard.  The Diamondbacks technically don’t have to trade Montgomery if an acceptable offer for another starter comes their way, and offers for Montgomery might improve if other teams become increasingly desperate to add pitching.

Of the six, Montgomery is the most obvious trade candidate, following a rough 2024 showing and owner Ken Kendrick’s public, verbal thrashing of the player. In October, Kendrick openly lamented ever pushing his front office to sign Montgomery late in the 2023-24 offseason, calling it a “horrible decision to have invested that money in a guy that performed as poorly as he did” and “our biggest mistake this season from a talent standpoint.” Montgomery unsurprisingly exercised a $22.5MM player option even after being called out by Kendrick — a straightforward decision for a pitcher coming off an injury-shortened year with career-worst marks in ERA (6.23), strikeout rate (15.6%) and walk rate (8.3%).

For all the focus placed on Montgomery’s struggles last year, the other veteran lefty signed by Arizona last offseason also fell well short of expectations. Rodriguez signed a four-year, $80MM pact with the Snakes but was limited to just 10 starts after opening the season on the injured list due to a shoulder strain. He pitched 50 innings of 5.04 ERA ball while showing diminished life on his four-seamer and sinker. Rodriguez is owed $20MM for the coming season, $21MM in 2026 and $19MM in 2027. He’s also guaranteed a $6MM buyout on a $17MM mutual option for the 2028 season — an option that could automatically vest based on his innings tallies in 2026-27. While Montgomery’s contract is underwater, the three years and $66MM remaining on Rodriguez’s pact very likely make him even harder to unload.

Any of  the other four arms in Arizona’s rotation would be hard to pry loose. Ace Zac Gallen is a Cy Young contender when healthy, evidenced by fifth- and third-place finishes in 2022 and 2023 balloting. He missed about a month of action with a hamstring strain in 2024 and flashed worse command than usual (relative to his excellent standards, anyhow), but any team would love to have the right-hander. He’s projected by MLBTR contributor Matt Swartz to earn $14.1MM in his final season of club control before becoming a free agent next winter. Gallen is not being shopped, to be clear. Hazen even chuckled at the mere notion of Gallen being a prominent trade candidate in a mid-November appearance on Arizona Sports 98.7’s Wolf & Luke Show (2:35 mark). That’s unlikely to stop other teams from trying.

Kelly, like Gallen, is a free agent next offseason. He missed more than three months in 2024 with a shoulder strain but was generally effective when healthy, logging a 4.03 ERA with a slightly below-average 21% strikeout rate and a strong 6.3% walk rate. Arizona made an easy call to exercise a $7MM club option on Kelly for the upcoming season.

Nelson and Pfaadt are both controllable and thus quite valuable to the Snakes. The 26-year-old Nelson is under club control for four more seasons and just tossed 150 2/3 innings with a 4.24 ERA, 20% strikeout rate and outstanding 5.4% walk rate in 2024. Those numbers are skewed by a slow start, but from July onward, Nelson posted a 3.05 ERA, 24.8 K% and 5.0 BB% in 82 2/3 frames. He’s not yet eligible for arbitration.

Pfaadt, also 26, paced the D-backs with 181 2/3 innings and 32 starts. His 4.71 ERA doesn’t stand out, but his 24.3% strikeout rate, 5.5% walk rate, 3.61 FIP and 3.65 SIERA are all far more encouraging. He might’ve worn down a bit late in the season as he pushed through that new career-high workload, as his worst months were August and September. A disproportionate amount of the damage against Pfaadt this season came in one nightmare September outing, wherein the Brewers tagged him for eight runs in just 1 2/3 innings. Lopping off even that one start would cause his season-long ERA to drop by nearly 40 points. Regardless, the former top prospect is a 2025 breakout candidate when considering his pedigree and rate stats that far outpace his pedestrian earned run average. Of the arms on the big league staff, he’s probably the most difficult for another team to acquire.

There’s depth even beyond that sextet. Right-hander Drey Jameson will be back from 2023 Tommy John surgery next year. He’s already had some big league success. There are another five starters on the 40-man roster and likely ticketed for Triple-A, all of whom have minor league options remaining and at least a bit of MLB experience: Yilber Diaz, Slade Cecconi, Blake Walston, Cristian Mena and Tommy Henry. Few organizations boast a stockpile of arms so deep.

All of that is to say — it’s hardly a surprise that clubs are calling the D-backs about their starters. The same is true of their outfielders, as Hazen already acknowledged a couple weeks back. Piecoro writes that (naturally) Montgomery is both the likeliest to move and the pitcher whom the team would most strongly prefer to deal. Hazen stated that Kendrick’s comments regarding the left-hander have “zero” impact on the urgency to trade him, though there’s likely some public-facing lip service at play there.

Piecoro adds that the D-backs would be willing to take on another contract of some note in return for Montgomery (if said player filled a roster need) or perhaps pursue more of a traditional salary dump, where they shed as much of the contract as possible for little to no return. Of note, Hazen suggested that if he’s to ultimately move Montgomery in deal that is primarily rooted in salary relief, the trade would need to come together before the bulk of quality free agents come off the board: “At some point, it doesn’t make sense because your pivot moves are picking at the edges rather than getting somebody (who is more of a target).”

12:40pm: The Diamondbacks are going to place catcher Gabriel Moreno on the 10-day injured list with a groin injury, per John Gambadoro of Arizona Sports 98.7 FM on X. Fellow backstop Adrian Del Castillo will have his contract selected to take Moreno’s place on the roster. The Snakes already had a 40-man vacancy so no further moves will be required.

Moreno came up limping during yesterday’s game while trying to run out a ground ball. He was removed from the contest with what the team described as a strained left groin. It’s still unclear how long he is expected to be out of action but it’s a rough blow for the Diamondbacks regardless. Moreno is slashing .262/.344/.385 this year for a 107 wRC+ with strong defensive grades as well. FanGraphs considers him to have been worth 2.4 wins above replacement in 86 games.

It’s the second IL stint of the year for Moreno, who also missed some time at the end of June due to a sprained left thumb. Prior to that, he had been sharing the catching duties with Tucker Barnhart, with José Herrera called up to pair with Barnhart in Moreno’s absence. Once Moreno was ready to return in early July, the club decided to keep Herrera around, with Barnhart designated for assignment and eventually released.

That left the Diamondbacks with Moreno and Herrera as the only two backstops on the 40-man roster. Now that Moreno is heading to the IL again, they need to reach into their non-roster depth, which gets Del Castillo up to the majors for the first time.

Now 24 years old, Del Castillo was selected with a competitive balance pick in 2021, going 67th overall in that year’s draft. Baseball America ranked him #29 in Arizona’s system coming into this year but he has launched himself up to #16 in their most recent update. He was #36 at FanGraphs earlier in the year.

BA considers him subpar defensively but strong at the plate, which has shown up at times during his minor league career. That’s especially true here in 2024, which is likely why he earned such a notable bump in the BA rankings. In 100 Triple-A games this year, he has 24 home runs, an 11.5% walk rate and a 16.8% strikeout rate. His .319/.403/.608 batting line translates into a 143 wRC+ even in the hitter-friendly environs of the Pacific Coast League.

If he can bring even a small portion of that production up to the big leagues with him, it will go a long way towards compensating for the loss of Moreno. Herrera has hit just .229/.308/.286 this year for a 72 wRC+ with his glovework graded as near league average. Perhaps Del Castillo can outperform him at the plate but even top prospects can struggle when first exposed to the majors. The club will also have to consider that Herrera has a head start on Del Castillo in terms of building relationships with the pitching staff.

The Snakes are currently 61-52 and essentially in a three-way tie for the National League Wild Card spots with Atlanta and San Diego. Atlanta is 60-51 and percentage points ahead of the two other clubs, who are each 61-52. The Mets are just 1.5 games back of that group and five other clubs are just behind New York. With that crowded playoff race, the importance of every game will be magnified going forward. The catching situation will likely evolve in the coming weeks, depending on how much time Moreno needs to miss and how Del Castillo performs in his first taste of the majors. Herrera is in his final option year and will be out of options in 2025.

Tonight’s game provided an immediate test. Arizona coughed up an early 5-0 lead but bounced back to take a two-run lead into the ninth. Lovullo tabbed sidewinder Ryan Thompson to close it out. Thompson gave up a couple singles and a run but successfully locked down a 9-8 victory. That usage could indicate the sinkerballer will get the bulk of the closing chances, though Arizona needed to use high-leverage arms Kevin Ginkel, A.J. Puk, Dylan Floro and Justin Martinez just to get it to the ninth.

In any case, the Snakes won’t give every narrow ninth inning lead to Sewald. The veteran right-hander had been almost spotless between his early May season debut through the end of June. He carried a 0.54 ERA over 16 2/3 frames. Sewald locked down his first 11 save chances in the process.

Things unraveled for him almost immediately once the calendar turned to July. Sewald gave up multiple runs and blew the lead in each of his first three outings of the month, all of which ended up being Arizona losses. He rebounded with five straight scoreless appearances, but he’s given up runs in three of his four most recent games.

Sewald blew a save in what turned out to be an extra-inning loss to Pittsburgh on Saturday. He got the call on Wednesday to hold a 5-2 lead against the Nationals but put four of five runners aboard (three via walk). Thompson came on and ended up securing a 5-4 win. That’s technically a hold for Sewald but obviously not a good performance.

The nightmarish few weeks came largely out of nowhere. Sewald has been one of the best relievers in MLB since his breakout with the Mariners in 2021. He turned in a 2.88 ERA over parts of three seasons in Seattle. Arizona’s call to send Josh Rojas, Dominic Canzone and Ryan Bliss to the M’s at last year’s deadline added needed stability to the back end of the bullpen.

It ended up being one of the biggest moves in the D-Backs’ surprising pennant run, as Sewald picked up 13 saves with a 3.57 ERA down the stretch. He wasn’t missing quite as many bats as he had in Seattle, but Sewald had a 2.10 ERA with a 25.2% strikeout rate over 34 1/3 innings as a Diamondback until last month. He is an impending free agent, so his performance down the stretch is especially important for him personally.

Arizona made a big deadline move for bullpen help for the second straight year, bringing in Puk for a pair of prospects last month. They swung a more minor deal for Floro minutes before the deadline on Tuesday evening. That gives them some cover to allow Sewald to work through this funk in lower-leverage spots.

The D-Backs are trying to hang onto a Wild Card spot in what remains a crowded National League field. They’re riding a four-game win streak to get a season-high eight games over .500 but are only one game clear of the Mets, the top non-playoff team at the moment.

Two big factors in their potential pennant push: Eduardo Rodriguez and Merrill Kelly. Arizona has been without two of their top starters for the bulk of the season. Rodriguez has yet to make his team debut after sustaining a lat strain in Spring Training. Kelly went down in mid-April with a shoulder strain.

The D-Backs could get a boost from both pitchers. Rodriguez should be reinstated from the 60-day injured list to start next Tuesday’s game against the Guardians, tweets John Gambadoro. Meanwhile, Gilbert relays on X that Kelly is slated to start a rehab stint that same night with High-A Hillsboro. That’d likely kick off a few week rehab process before he’s ready to get back on the mound at Chase Field.

Arizona did get a couple less encouraging updates on the pitching staff, though. Nick Piecoro of the Arizona Republic tweets that reliever Bryce Jarvis is likely to miss the rest of the season with an elbow sprain. The former first-round pick is not expected to require surgery but will need to be shut down from throwing. Jarvis has worked in a low-leverage relief role, tossing 59 1/3 frames of 3.19 ERA ball. His strikeout and walk profile is a lot less impressive than that ERA, but the Duke product has been a bullpen workhorse.

Rookie right-hander Cristian Mena is also likely done for the season. Alex Weiner of AZ Sports reported on Tuesday that the 21-year-old suffered a forearm strain in Triple-A (X link). Mena, who made his MLB debut last month with a three-inning spot start, is on the minor league injured list but could move to the 60-day IL if the Snakes need a 40-man roster spot. The Diamondbacks acquired him over the winter in a one-for-one swap sending outfielder Dominic Fletcher to the White Sox.

Gallen suffered a right hamstring strain just six pitches into a start on May 30, so he’ll now return to action after almost exactly a month off.  The rehab process went pretty smoothly for the ace right-hander, as he didn’t even make any minor league rehab starts during his recovery.  Gallen instead tossed live batting practice sessions, simulated games, and bullpens to ramp up and get ready, and a 67-pitch sim game last Monday was essentially the final step of the process.  Once Gallen came out of a Thursday bullpen session feeling good, the D’Backs finalized their plans to start Gallen today against Oakland.

Needless to say, getting Gallen back after just a month is a sigh of relief for the Diamondbacks, considering how injuries have plagued Arizona’s rotation.  Eduardo Rodriguez signed a four-year, $80MM free agent deal over the offseason but has yet to pitch after suffering a lat strain during Spring Training, and Merrill Kelly will be out until at least mid-August due to a teres major strain in his throwing shoulder.  Jordan Montgomery’s late signing and subsequent late start to the season has also led to some inconsistent results for the left-hander, and between some other struggles for the younger starters, Arizona ranks only 27th of 30 teams in rotation ERA this season.

Gallen was again a bright light for the rotation, with a 3.12 ERA in his first 11 starts and 57 2/3 innings before his hamstring strain.  Missing a month could hurt Gallen’s chances of his third straight top-five finish in NL Cy Young Award voting, yet helping get the Diamondbacks into contention again is surely the chief priority in Gallen’s mind.  Despite the starting pitching concerns and a 39-43 record, the D’Backs are 3.5 games back of the last NL wild card spot, so getting even average results from the rotation could put Arizona more firmly in position for a second-half surge.

In other news about Rodriguez, manager Torey Lovullo told MLB.com and other media that the left-hander will undergo an MRI in a week to ensure that everything is progressing as expected with his lat muscle.  Rodriguez has been throwing at distances of 105 feet, but if the MRI is clean, he’ll start a more intensive throwing program.

It’s excellent news for the Diamondbacks that Rodriguez is making his way toward a return, with Lovullo indicating that he’s set to begin a throwing program. Rodriguez will be sidelined through at least May 24 due to his placement on the 60-day injured list but it’s at least feasible he could return to game action not long after that if he manages to avoid further setbacks. Rodriguez’s lat injury woes have prevented him from making his Dbacks debut to this point in the 2024 campaign, but he’s coming off an excellent season with the Tigers last year that saw him post a 3.30 ERA and 3.66 FIP in 152 2/3 innings of work and should provide a major boost to an Arizona rotation that’s currently relying on Ryne Nelson and Slade Cecconi in the absence of Rodriguez and veteran righty Merrill Kelly.

As for Thomas, the lack of update from the Diamondbacks is a somewhat ominous sign regarding his hamstring. The 24-year-old was initially scheduled to be activated from the IL last week but ended up exiting a rehab outing with Triple-A due to an issue with his injured hamstring on May 5 that ultimately did not improve after a day off, prompting Arizona to delay his return and send him for testing. Once a consensus top-30 prospect in the sport, Thomas has struggled at the big league level with a .230/.273/.362 slash line in 242 career games but nonetheless figured to be the club’s starting center fielder this season. Corbin Carroll has handled center field in Thomas’s absence with Jake McCarthy stepping from the bench into Thomas’s spot in the lineup while manning right field.

More from the NL West…

• Padres right-hander Joe Musgrove is making good progress in his return from right elbow inflammation, according to manager Mike Shildt (per MLB.com’s Injury Tracker). The 31-year-old’s initial worrisome diagnosis was described as “precautionary” when he was initially placed on the shelf last week, and it appears that description was an apt one as Musgrove has reportedly already begun light baseball activities, including playing catch. MLB.com writes that the right-hander is optimistic that he’ll be able to return “shortly after” the minimum 15-day stint on the IL, which would likely result in him returning to action sometime next week. San Diego is surely hoping that Musgrove will look more like the ace hurler who posted a 3.05 ERA in 459 2/3 innings in a Padres uniform entering the 2024 campaign than he has to this point in the season, as he struggled badly with a 6.37 ERA and 5.96 FIP in eight starts prior to his placement on the shelf.
• The Rockies may have lost outfield prospect Benny Montgomery for the season on Friday, as MLB.com’s Thomas Harding relays that the 21-year-old underwent shoulder surgery that Rockies director of player development Chris Forbes said will keep him out until at least “toward the end of the year” if he’s able to return this season at all. The club’s first-round pick in the 2021 draft, Montgomery turned heads during the Arizona Fall League last year with a .333/.436/.500 slash line in 19 games and was hitting a solid .283/.313/.500 in his first taste of Double-A action before being sidelined by the shoulder injury.

Sewald seems to be the closer of the two to being activated, as he already joined the D’Backs in the clubhouse today prior to their departure for Cincinnati.  The closer started a Triple-A rehab assignment with two-thirds of an inning on April 23, but then his rehab was slowed down after he felt sore following a bullpen session.  A subsequent bullpen session went much more smoothly, and after tossing an inning in an extended Spring Training game Saturday, Sewald appears to be ready to get his 2024 season underway.

The return can’t come soon enough for an Arizona bullpen that has been shaky at best.  The Diamondbacks can only hope that Sewald can stabilize things as well as he did last summer after being acquired from the Mariners at the trade deadline, as Sewald solidified Arizona’s ninth-inning situation and played a huge role in the club’s pennant-winning postseason drive.  This success brought a bit of spotlight to a reliever who had largely flown under the radar in posting a 2.95 ERA over 189 1/3 innings with the M’s and D’Backs since the start of the 2021 season.

Thomas is much more familiar with the hype train due to his time as a top-100 prospect, but the outfielder is still looking to break out in his third Major League season.  On the plus side, Thomas has been an excellent defensive center fielder and he brings a lot of speed to the table, but his career .230/.273/.362 slash line (over 827 plate appearances) leaves a lot to be desired.

Once he makes his return, the Diamondbacks should be able to finally adopt their preferred outfield alignment of Corbin Carroll in right field, Thomas in center, Lourdes Gurriel Jr. in left field, and Randal Grichuk and Jake McCarthy providing depth (with Grichuk likely spelling Thomas against left-handed pitching).  This alignment might have the carry-on effect of helping Carroll get on track at the plate, as the reigning NL Rookie of the Year’s struggles could be linked to the fact that he took over regular center field duty with Thomas sidelined.

Speaking of injury returns, the D’Backs got some reinforcement back today when Ryne Nelson was activated from the 15-day IL.  Nelson hadn’t pitched since he was struck in the elbow by a line drive on April 18, and while he looked a little rusty in allowing four earned runs in five innings today, it was still enough to earn a win in Arizona’s 11-4 rout of the Padres.

Nelson provides some help to a rotation that is still without Merrill Kelly and Eduardo Rodriguez due to their placements on the 60-day IL.  Kelly is gone until at least late June, but manager Torey Lovullo provided some news about Rodriguez today, telling Alex Weiner of Arizona Sports and other reporters that the southpaw will undergo some more tests on his injured lat muscle.  If E-Rod is feeling good and the tests come back clean, Lovullo said Rodriguez could soon start a throwing program.

Rodriguez started the season on the 15-day IL before being transferred to the 60-day, so late May represents the absolute best-case scenario for his first official appearance in a D’Backs uniform.  Since some significant ramp-up time will be required and Rodriguez has already been shut down from throwing once due to continued discomfort in his lat, it’s probably safe to guess that his rehab process will stretch into early June.

Lovullo also had an update on Geraldo Perdomo, as the infielder is throwing and taking grounders.  “Three weeks post surgery, so he’s gotta be careful with his next steps.  It’s getting close to him getting to full baseball activities and I’m excited about that,” the manager told Weiner and company.  Perdomo tore his right meniscus just shy of a month ago, so is on pace with the usual 4-6 week timeline associated with such injuries.

It’ll be the first big league action since 2022 for the 26-year-old Allen (not to be confused by the other left-hander named Logan Allen, who solidified himself in the Guardians’ rotation with a strong rookie campaign in 2023).

The older Allen also pitched for Cleveland previously, to make matters more confusing. He’s a former eighth-round draft pick who’s appeared in parts of four big league seasons, working to a combined 5.89 ERA in 96 1/3 frames between Cleveland, San Diego and Baltimore. In a dozen innings with Reno, he’s pitched to a 3.00 ERA with nine strikeouts, three walks and a 50% ground-ball rate.

The “60-day” term on Rodriguez’s IL stint is retroactive to his original placement and does not reset to today. While Arizona had hoped he’d only miss a month originally, the veteran southpaw recently experienced renewed shoulder discomfort during a throwing session and had his rehab program paused. In light of that setback, it’s not especially surprising to see him pushed to the 60-day IL. His original placement was retroactive to March 25, meaning he’s now sidelined through at least Friday, May 24.

With Rodriguez now shelved for another five weeks at least, Arizona’s rotation will consist of Zac Gallen, Merrill Kelly, Jordan Montgomery and Brandon Pfaadt in the top four spots. Montgomery has also yet to make his season debut but it scheduled to do so on Friday. Twenty-six-year-old righty Ryne Nelson currently holds the fifth spot, but he’s yielded eight runs in 13 2/3 innings this season and carries a 5.31 ERA in 157 2/3 frames dating back to last year. His grip on that rotation spot is not exactly iron-clad.

Rodriguez suffered a lat strain during his fourth Spring Training appearance. He started the season on the 15-day injured list. The Snakes reportedly expected him to be sidelined for around a month, though this will surely push that timetable back. It’s an inauspicious start to his four-year, $80MM free agent deal.

Arizona viewed Rodriguez as the necessary upper mid-rotation arm to slot behind Zac Gallen and Merrill Kelly. He turned in that level of production for the Tigers a year ago, working to a career-low 3.30 ERA with solid strikeout and walk rates over 152 2/3 innings. While there’s still plenty of time for Rodriguez to meet the organization’s expectations, it seems likely he’ll at least be out of action into May.

Within weeks of Rodriguez’s injury, the D-Backs made a surprising late strike for Jordan Montgomery. Perhaps Arizona would have found the southpaw’s asking price (one year, $25MM with a vesting player option for 2025) too good to pass up in any case. That addition could take on added importance in the wake of this setback. Montgomery is building into game shape with Triple-A Reno and is expected to be called to the majors by the end of next week.

Gallen and Kelly are again off to excellent starts, yet the final three rotation spots have been a problem. Brandon Pfaadt isn’t in any danger of losing his job but is sitting on a 6.48 ERA through his first three starts. Tommy Henry has allowed 10 runs over 14 innings, while Ryne Nelson has been tagged for eight runs in 7 2/3 frames over his first two outings. One of Nelson or Henry seems likely to head to Triple-A once Montgomery is ready to step into the big league staff.

In many ways, it’s a three-inning microcosm of Lewis’ career. The 24-year-old is a .313/.369/.564 hitter in 284 plate appearances — not including last year’s four postseason homers in 26 plate appearances — but he’s also twice torn his ACL and had IL stints for oblique and hamstring strains. A healthy Lewis has superstar potential, but injuries have been far too frequent early in his career. If Lewis requires a trip to the injured list, top prospect Brooks Lee won’t be an option to replace him. The 2022 No. 8 overall pick is dealing with a back injury, and Triple-A skipper Toby Gardenhire tells KSTP’s Darren Wolfson that he’ll be down for about three to four weeks (X link). Minnesota also had an injury scare with right fielder Max Kepler, who exited the game after fouling a ball into his leg. X-rays came back negative, per the Star-Tribune’s Bobby Nightengale (X link).

A few more injury situations worth monitoring as they unfold…

• The Diamondbacks lost Eduardo Rodriguez to a lat strain late in spring training — a discouraging development for the left-hander, who inked a four-year deal worth $80MM over the winter. No timetable was provided at the time of the injury, but manager Torey Lovullo told the team’s beat yesterday that Rodriguez could throw off a mound in about five days (X link via Nick Piecoro of the Arizona Republic). Jon Heyman of the New York Post, meanwhile, writes that the Snakes expect Rodriguez to be down for about a month. That’d be a notable absence but far from a worst-case scenario, as lat strains for pitchers can often result in multiple months on the shelf. In 152 2/3 frames last season, E-Rod notched a 3.30 ERA, 23% strikeout rate and 7.7% walk rate for the Tigers.
• Dodgers skipper Dave Roberts provided a series of updates on some injured pitchers yesterday (X thread via Jack Harris of the L.A. Times). There was good news on both Walker Buehler and Clayton Kershaw, each of whom Roberts described as ahead of schedule. The Dodgers have made clear they’re being cautious with Buehler’s rehab from a second career Tommy John surgery, but the right-hander’s progress so far is encouraging enough that he’ll be back “sooner than I think we anticipated,” per Roberts. Kershaw, who had shoulder surgery in early November, is long-tossing from 120 feet and ahead of initial rehab projections. Roberts’ updates on righties Brusdar Graterol and Blake Treinen were far less encouraging. Both are playing catch but are “a ways away” from activation. Graterol was slowed by hip and shoulder troubles during camp, while Treinen suffered a bruised lung when a comeback liner hit him in the chest. The Dodgers originally suggested that it wouldn’t require a lengthy absence, but Treinen has yet to even throw a bullpen session.
• Right-hander Luke Jackson exited last night’s game with Giants trainers after suffering some degree of back injury. Shayna Rubin of the San Francisco Chronicle writes that the 32-year-old Jackson underwent an MRI and will be further evaluated today. Jackson missed just under a month with a back strain last year but said following last night’s injury that the initial pain this time around was not as severe as it was in 2023. The Giants inked Jackson to a two-year, $11.5MM contract in the 2022-23 offseason while he was rehabbing from Tommy John surgery. He made his team debut late last May and was excellent when healthy enough to be on the roster: 33 1/3 innings, 2.97 ERA, 30.1% strikeout rate. Last night, however, Jackson’s velocity was down more than a mile per hour from his 2023 average, and he allowed all three hitters he faced to reach base. All three came around to score.

Lovullo says Rodríguez will be shut down until he’s asymptomatic, but he doesn’t seem to have an idea of how long that will take, with video courtesy of Alex Weiner of AZ Sports. “I know you guys want to know lengths of time, all the common questions that I want to know,” he said. “But we don’t know that. It’s going to depend on how he progresses and how he’s feeling day by day. We’re going to assess it daily and then build it out from there. The return will be determined by the length of time that he’s down. And I can tell you that he’s been feeling better day by day.”

Rodríguez departed his start on Tuesday after just one inning with some lat discomfort and it now seems a strain has been found. If he remains out of action for a notable amount of time, he may then need to effectively start his Spring Training ramp-up period from scratch.

It’s obviously unwelcome news for the Diamondbacks, as Rodríguez was their big offseason splash to upgrade the rotation. The Snakes managed to get all the way to the World Series last year despite a starting mix so weak that they were doing bullpen games in the playoffs.

They signed Rodríguez to a four-year, $80MM deal this winter with the hope of him stabilizing the rotation behind Zac Gallen and Merrill Kelly. That may come to pass eventually, but he’ll begin the season on the IL and will have a questionable timeline until more information comes to light.

In the meantime, the Diamondbacks will have to fill out the rotation with fairly unproven hurlers. Brandon Pfaadt, Ryne Nelson and Tommy Henry are the most likely pitchers to fill in behind Gallen and Kelly. Between those three, Nelson has the most regular season experience, with just 162 1/3 innings. Henry’s 4.57 ERA is the lowest of three. Pfaadt finished last year with a strong showing in the postseason but he’s allowed seven earned runs in 5 2/3 innings this spring.

Despite being the reigning National League champions, the Snakes are likely facing a tough battle this year. The Dodgers are loaded with superstars while the Giants recently had Blake Snell and Matt Chapman fall into their laps. The Padres have battled a budget crunch this winter but still have lots of talent on the roster. For the Diamondbacks, their rotation is now back to the wobbly state it was in at the start of the offseason, so they will naturally be hoping for a quick return from Rodríguez.

Culberson turns 35 in April, and Atlanta’s stacked lineup meant that he appeared in just one Major League game in 2023, despite several months on the active roster.  It remains to be seen if pitching will provide Culberson with any clearer path to playing time, yet his fastball clocks in at 94mph, and his repertoire also consists of a split changeup and a cutter.  He has also spent the last six months working with coaches and pitching instructors, and embracing the inherent difficulties of learning a new craft so deep into his career.

“For me, this has been a challenge making a position change, but I’m still playing baseball.  I know how tough that is transitioning, and I’m sure it would be probably tougher transitioning out of baseball,” Culberson said.  “Everything is just not gonna come easy for a lot of us in life, and at some point, you have to be ready and able to do something different, do something that’s not comfortable.  Get out of your comfort zone.”

More from around the NL East…

• The Mets had some limited interest in Eduardo Rodriguez and old friend Seth Lugo this past offseason, The Athletic’s Will Sammon writes, though “neither exchange got serious.”  Apart from a serious push to sign Yoshinobu Yamamoto, the Mets generally stayed away from pursuing any longer-term contract candidates, as such explorations into players like Rodriguez and Lugo were more akin to routine due diligence.  Sammon notes that the same looks to be true of the Mets’ recent talks with J.D. Martinez, even if a probable one-year deal with Martinez would be less expensive than that it would’ve cost to land Rodriguez or Lugo.  E-Rod ended up signing with the Diamondbacks for four years and $80MM, while Lugo (who pitched for New York from 2016-22) inked a three-year, $45MM contract with the Royals.
• Victor Victor Mesa was so highly touted as an international prospect that he received a $5.25MM bonus from the Marlins in 2018.  Despite all the hype, however, Mesa has hit only .233/.289/.289 over 1211 career plate appearances in the minors, and The Miami Herald’s Barry Jackson writes that his time in the Marlins organization now looks to be over.  While there hasn’t been an official parting of the ways, the 27-year-old Mesa isn’t expected to attend Spring Training camp, and was temporarily placed on the restricted list last July after leaving the Triple-A team prior to the start of a series in Gwinnett.  Victor Mesa Jr. was also signed to a $1MM bonus at the same time as his older brother, and the younger Mesa has developed into an intriguing prospect, ranked by Baseball America as the sixth-best player in Miami’s farm system.

This week, host Darragh McDonald is joined by Tim Dierkes of MLB Trade Rumors to discuss…

• Dodgers acquire and extend Tyler Glasnow (0:30)
• The Giants signed outfielder Jung Hoo Lee (7:15)
• Diamondbacks sign Eduardo Rodriguez and Lourdes Gurriel Jr. (13:05)

Plus, Steve Adams joins to answer your questions, including…

• What’s going on with Atlanta shuffling all these contracts around? (21:25)
• Will the Mariners do anything with the payroll they jettisoned? (30:15)

Check out our past episodes!

• Shohei Ohtani, Juan Soto and Deferred Money – listen here
• Winter Meetings, Ohtani Secrecy, and the Mariners Shedding Salary – listen here
• Sonny Gray, Kenta Maeda and Offseason Questions – listen here

The podcast intro and outro song “So Long” is provided courtesy of the band Showoff.  Check out their Facebook page here!

Since Los Angeles exceeded the luxury tax last season, the Dodgers had to give up $1MM in international bonus pool money and their second- and fifth-highest picks in the 2024 draft as compensation for Ohtani, who rejected the Angels’ qualifying offer.  Snell also rejected a QO from the Padres, so the thought of giving up two more picks to add Snell might simply not be palatable for the Dodgers.  While Snell’s market has been a little less clear than other top pitchers on the free agent market, such clubs as the Giants, Red Sox, and Padres have all been linked to Snell at various points, and it remains to be seen what other suitors might emerge once the likes of Yoshinobu Yamamoto or Jordan Montgomery are off the board.  The Dodgers continue to be involved in the hunt for Yamamoto, and could pursue other trade options beyond Glasnow in order to address the lack of proven depth in their rotation.

More from around the NL West…

• The Giants remain interested in potentially re-signing Sean Manaea, The San Francisco Chronicle’s Susan Slusser reports.  There hasn’t been much buzz on the left-hander since he opted out of the final year (and a $12.5MM salary) of his previous contract with San Francisco to test the open market, though it stands to reason that Manaea might get more looks as more and more free agent pitchers come off the board.  Likewise, the Giants’ pitching needs haven’t really changed since the offseason began, and Manaea might be a reasonable addition even if they did land Yamamoto or Snell considering that the Giants could deal from their crop of young pitchers to bolster their lineup.  Manaea had a 4.44 ERA and an above-average 25.7% strikeout rate over 117 2/3 innings for the Giants last season, working in a modified swingman role as a starter, bulk pitcher, or piggyback starter.
• Eduardo Rodriguez’s past history with Diamondbacks GM Mike Hazen and manager Torey Lovullo helped pave the way to the Snakes’ four-year, $80MM contract with the free agent southpaw, as Rodriguez told reporters (including Theo Mackie and Nick Piecoro of the Arizona Republic).  Hazen was Boston’s GM and Lovullo the bench coach during Rodriguez’s past stint with the Red Sox, and this familiarity resulted in what Hazen described as a two-hour meeting that touched on both the past and what Rodriguez can bring to the D’Backs going forward.  Rodriguez and agent Gene Mato met with seven teams during the Winter Meetings, and the field was narrowed to the D’Backs and a mystery team before Arizona sealed the deal in a second sitdown.