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Blake Walston

Diamondbacks Designate Dylan Floro For Assignment

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The Diamondbacks announced today that they’ve designated right-hander Dylan Floro for assignment. The move makes room on the active roster for left-hander Blake Walston, who was recalled from Triple-A. Arizona’s 40-man roster stands at 39.

Floro, 33, signed a one-year deal with the Nationals over the offseason but was dealt to the Diamondbacks in a buzzer-beater deal just before this year’s trade deadline in exchange for first baseman Andres Chaparro. At the time of the deal, Floro had gotten excellent results with a 2.06 ERA and a 2.64 FIP in 52 1/3 innings of work despite a lackluster 19.6% strikeout rate. That hasn’t continued in Arizona, as Floro’s time with the Diamondbacks has been nothing short of a disaster. The righty has surrendered a 9.37 ERA in 16 1/3 innings of work, and while his 6.30 FIP over that same timeframe indicates some level of positive regression in the future, even that lower figure would still be ghastly production for the right-hander.

Floro will be either released or placed on waivers in the coming days, though if the right-hander is waived he’ll surely clear waivers with so little time left in the regular season. Should he clear waivers, he’ll have the opportunity to either accept an outright assignment to the minors as non-roster depth for what’s left of the season or else elect free agency and get a head start on searching for a deal for the 2025 season with a new club. Disastrous as his time in Arizona was, the right-hander still boasts a 3.80 ERA and 3.51 FIP overall this season. Those figures should be good enough to earn him some level of interest on the open market, though perhaps only on a minor league deal given his rough second half.

As for Walston, the 23-year-old rookie made his big league debut with the Diamondbacks back in May. He’s made three appearances for Arizona since then, two of which were starts. In all, he has a 2.84 ERA and 4.28 FIP in 12 2/3 innings of work, though that comes with nearly as many walks (9) as strikeouts (11) and three additional hit batsmen. With Ryne Nelson having recently been placed on the injured list, the addition of Walston to the roster should give the club another multi-inning relief option from the left side now that Jordan Montgomery is seemingly slated to re-enter the rotation in Nelson’s place.

Diamondbacks Select Humberto Castellanos

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The D-Backs announced they’ve selected right-hander Humberto Castellanos onto the major league roster. Arizona also recalled lefty reliever Joe Jacques from Triple-A Reno, a move which was reported this afternoon. To clear the necessary spots on the MLB roster, the Snakes optioned southpaw Brandon Hughes and placed lefty Blake Walston on the 15-day injured list with inflammation in his throwing elbow. Arizona also reinstated righty Luis Frías from the 15-day IL and optioned him to Reno.

Arizona had an opening on the 40-man roster, which they’ll use to give Castellanos his first MLB look in two years. The Mexican-born hurler pitched in 25 games, including 16 starts, for the D-Backs between 2021-22. He turned in a 5.30 ERA over 90 innings before undergoing Tommy John surgery in August 2022. That led Arizona to outright him off their roster at the end of the season and forced him to sit out all of last year.

The Diamondbacks brought Castellanos back on a minor league contract over the winter. He’s healthy again and has logged 43 2/3 innings over 10 appearances in Triple-A. Castellanos has a 4.57 earned run average that is quite impressive considering Reno is among the toughest places to pitch in affiliated ball. He has punched out a solid 24.3% of opposing hitters, although he has also issued walks at a career-high 11.4% rate.

For most of his MLB career, Castellanos has shown the opposite profile: plus control without the ability to miss many bats. He has a modest 16.6% strikeout rate with a 7.3% walk percentage in 100 2/3 innings between the Astros and D-Backs. Castellanos doesn’t throw especially hard, but he can work out of the rotation or in long relief for Torey Lovullo. He still has a minor league option, allowing the Diamondbacks to send him back to Reno at any point without putting him on waivers.

Walston, a first-round pick in 2019, has made his first three MLB appearances this season. The North Carolina native has allowed four runs over 12 2/3 innings, striking out 11 against nine walks. It’s not clear how long he’ll be out of action. The Diamondbacks will presumably play things cautiously with any elbow issue for one of their more talented young pitchers.

Diamondbacks Designate Matt Bowman For Assignment

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The Diamondbacks announced this afternoon that right-hander Matt Bowman has been designated for assignment. Left-hander Blake Walston was recalled to the big league roster to replace Bowman on the club’s active roster.

Bowman, who will celebrate his 33rd birthday on Friday, joined the Diamondbacks earlier this month when he was acquired in cash deal with the Twins. At the time of the deal, Bowman had been squeezed off of Minnesota’s 40-man roster despite a solid showing in five appearances, where he posted a 2.35 ERA in 7 2/3 innings of work. Unfortunately, the wheels have come off for Bowman across his four appearances with Arizona, as he’s been shelled for six runs on eight hits and two walks in 6 2/3 innings of work that have ballooned his ERA to 5.02 on the year.

A 13th-round pick by the Mets in the 2012 draft, Bowman had considerable success with the Cardinals in the first two seasons of his big league career from 2016 to ’17. In a combined 126 1/3 innings of work, Bowman posted a solid 3.70 ERA (112 ERA+) with a stronger 3.47 FIP. That seemingly portended a successful career near the back of big league bullpens, but things didn’t work out that way as Bowman struggled to well below average results with St. Louis the following season, prompting the club to part ways with him.

He pitched for the Reds in 2019 to an impressive 129 ERA+ in 32 innings of work but a series of elbow injuries, including one that required Tommy John surgery, wiped out Bowman’s 2020-22 campaigns. The veteran resurfaced with the Yankees last year but was torched for a 9.00 ERA and 6.51 FIP in four innings of work before returning to the minor leagues. Arizona will now have one week to trade Bowman or attempt to pass him through waivers. The right-hander has been outrighted previously during his big league career and as a result can reject an outright assignment in favor of free agency should he so choose.

Replacing Bowman on the club’s 40-man roster is Walston, who is slated to take the ball for today’s start against the Marlins. It’ll be the first big league start and just the second MLB appearance of Walston’s young career. Arizona’s first-round pick in the 2019 draft, the 23-year-old climbed his way through up the minor league ladder to make his big league debut earlier this year, when he struck out five in 3 2/3 innings of work against the Dodgers while allowing two runs on three hits and four walks. That admirable effort against one of the league’s most intimidating offenses has earned Walston another opportunity in the majors thanks in part to the injuries facing the Dbacks rotation. Marquee offseason signing Eduardo Rodriguez has yet to throw a pitch for the club this year due to a strained lat and he’s been joined on the 60-day injured list by veteran righty Merrill Kelly, who is battling a shoulder strain.

Diamondbacks Promote Blake Walston For MLB Debut

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The Diamondbacks announced that they have optioned left-hander Andrew Saalfrank, with fellow lefty Blake Walston recalled in a corresponding move. The latter will be making his major league debut as soon as he gets into a game.

Walston, 23 next month, was the club’s first round pick in 2019. The Diamondbacks used the 26th overall pick of that year’s draft to grab Walston out of New Hanover High School in Wilmington, North Carolina.

He got a brief debut in the professional ranks in 2019, but then the minors were canceled due to the pandemic in 2020. He tossed 95 2/3 innings in 2021 between Single-A and High-A with a 3.76 earned run average, 28.8% strikeout rate and 8.1% walk rate.

In 2022, he returned to High-A but cruised through four starts before getting bumped up. He had a 5.16 ERA over his 21 Double-A starts that year, despite decent peripherals. He struck out 24% of batters faced and walked 8.5%, but a .341 batting average on balls in play and 14.5% home run per flyball rate added some extra runs.

Last year, he was sent to Triple-A and had a 4.52 ERA over 30 starts. He walked 14% of batters faced while only striking out 15.6% of them. He was added to Arizona’s 40-man roster in November to keep him out of the Rule 5 draft and returned to Triple-A this year. Through 20 2/3 innings this season, he has walked 15.3% of batters faced, striking out 19.4%, leading to a 4.79 ERA. Were it not for a 77.6% strand rate, he may have fared worse, which is why his FIP is at 6.36.

That lack of control perhaps points to a future relief role but he is still quite young and has time to rein in his stuff. The Diamondbacks have continued to stretch him out, suggesting they still believe in his potential to stick in a rotation at some point. Baseball America ranked him the #11 prospect in the club’s system coming into this year.

For now, he’s likely on the roster to give the club a multi-inning option out of the bullpen due to some strange circumstances. Jordan Montgomery was supposed to start yesterday’s game before it was delayed by a colony of bees that had taken up residence in the netting behind home plate. The start of the contest was delayed by about two hours while was called who could remove the bees, and the club decided to scratch Montgomery in that time. It seems fair to assume that Montgomery had already gone through some pregame preparations and the club didn’t want to ramp him back up again after a lengthy shutdown, similar to how pitchers often don’t return after long rain delays.

In the end, the Snakes went with a bullpen game and used seven different pitchers to cover 10 innings, as they eventually defeated the Dodgers in extra innings. Montgomery is taking the ball tonight but with a weakened bullpen, so Walston may be tapped, especially if Montgomery is bounced early.

Diamondbacks Select Blake Walston, Outright Chris Rodriguez

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The D-Backs announced they’ve added left-hander Blake Walston to the 40-man roster. That ensures he won’t be selected in next month’s Rule 5 draft. To clear a spot, the Snakes outrighted righty Chris Rodriguez off the roster.

Arizona drafted Walston 26th overall in 2019. The 6’5″ hurler was an upside flier out of a North Carolina high school. His minor league résumé has been somewhat mixed, although he still draws praise for his projectable frame and athleticism. Baseball America rated him as the #5 prospect in a quality Arizona system midseason.

Walston spent all of 2023 at Triple-A Reno. That’s an exceedingly difficult environment for a young pitcher. He posted a decent 4.52 ERA in 149 1/3 innings covering 30 starts. That came without particularly impressive strikeout or walk numbers, though. He punched out only 15.6% of opponents while walking 14% of batters faced.

Arizona just claimed Rodriguez off waivers from the Angels a couple weeks ago. They’ve succeeded in passing him through unclaimed, meaning he’ll remain in the organization without occupying a 40-man spot. A hard-throwing reliever, Rodriguez has battled shoulder and back injuries for the better part of three years. He has barely pitched since 2021. He’ll hopefully be able to put the injuries beyond him and compete for a bullpen job in Spring Training.

Diamondbacks To Sign First-Rounder Blake Walston

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The Diamondbacks have reached an agreement with first-round left-hander Blake Walston, the team announced. Walston received $2.45MM, just below the $2,653,400 slot value, Jim Callis of MLB.com tweets.

The Walston agreement brings the Diamondbacks closer to finishing their heavy lifting with respect to this year’s draft. They already signed fellow top 60 picks Corbin Carroll, Brennan Malone, Drey Jamison and Ryne Nelson before reaching a deal with Walston. That group helped comprise quite a 2019 haul for the Diamondbacks, who entered this draft with a league-high $16,093,700 to spend on their selections.

Arizona received the pick it used on Walston because it failed to sign 2018 first-rounder Matt McClain a year ago. In Walston, the team’s getting a prospect whom FanGraphs, Baseball America, ESPN’s Keith Law and MLB.com each ranked in or near the top 50 players available entering the draft. Law (subscription required) noted the high school hurler from North Carolina could be difficult to sign, but the Diamondbacks now have the 17-year-old under wraps.

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