More regarding A-Rod and the majors’ two East divisions:

• For his part, Rodriguez seems unsure if he wants to continue his career. After his final game with the Yankees on Friday, the 22-year veteran was reluctant to say he was done. “For all the things I’ve been through, to have a night like tonight, I don’t know what more I can ask for,” he said (Twitter link via David Lennon of Newsday). For what it’s worth, in a survey of 24 executives from around baseball, nearly half (11) told Jayson Stark of ESPN that Rodriguez would return either this season or in time for spring training next year.
• On the heels of his Saturday release from the Nationals, free agent reliever Jonathan Papelbon would welcome a return to Boston, reports Rob Bradford of WEEI (Twitter link). Papelbon, whom the Red Sox selected in the fourth round of the 2003 draft, had a highly successful run with the club from 2005-11. During that seven-season, 429 1/3-inning span, the right-hander converted over 88 percent of save opportunities (219 of 248) and compiled a 2.33 ERA, 10.67 K/9 and 2.41 BB/9. He’s far less effective now, having lost a few miles per hour on his fastball and his job as Washington’s closer before it released him. However, Boston’s bullpen has posted a 4.14 second-half ERA – the sixth-highest figure in baseball – notes Evan Drellich of the Boston Herald. Moreover, the Red Sox are without injured setup man Koji Uehara, and closer Craig Kimbrel has scuffled while dealing with soreness in his surgically repaired left knee. Given their issues, Papelbon is “worth investigating,” Sox president Dave Dombrowski told reporters, including Nick Cafardo of the Boston Globe (Twitter link).
• Thanks to a clean MRI on Saturday, the Nationals will not place right fielder Bryce Harper on the disabled list, president and general manager Mike Rizzo said (via Alex Putterman of MLB.com). Harper hasn’t taken an at-bat since last Saturday because of a stiff neck, and manager Dusty Baker is wary of playing the 23-year-old in the event the team decides to place him on the DL retroactively. By playing him, Baker would reset the clock on a retroactive DL stint.
• Left-hander Jon Niese is likely to return to the Mets’ rotation at the expense of Logan Verrett, whom the team pulled from its starting five after a disastrous Friday outing, according to Troy Provost-Heron of MLB.com. In an 8-6 loss to the Padres that dropped the Mets to below .500, Verrett yielded all eight runs on six hits (including four home runs) and three walks. Verrett has thrown 60 innings as a starter this year and recorded a 6.45 ERA, 6.15 K/9 and 4.8 BB/9. Niese was a capable option out of the Mets’ rotation from 2010-15, but he struggled this year with the Pirates after an offseason trade, leading Pittsburgh to deal him back to New York prior to the non-waiver trade deadline. Niese’s return to the Mets was going well until Thursday, when he gave up six earned runs on three hits and three walks in just an inning of work.

That the Bucs would look to move Locke isn’t exactly a stunner, as the 28-year-old has been on the fringes of the rotation anyhow in recent seasons. Locke found himself in a competition with Vance Worley for a rotation spot in 2015, and, dating back to Opening Day of last season, has pitched to a combined 4.78 ERA in 269 1/3 innings (including a 5.26 mark this season). The 28-year-old is averaging career-lows in K/9 (4.7) and ground-ball rate this season (46.6 percent) and has yielded a troublesome .287/.351/.498 batting line to opposing right-handed hitters this season.

Locke isn’t teeming with upside, but a club that has been beset by injuries in the rotation could certainly do worse than him when filling out the back of the rotation. Locke did, after all, manage a 3.98 ERA in 81 starts from 2013-15, and he’s earning a reasonable $3.025MM salary in 2016. He’s controllable for another pair of seasons beyond the current campaign and doesn’t figure to be in line for a significant bump in salary due to his aforementioned 2016 struggles.

While it’s rare to see a contending club move one or even two arms from its big league rotation — especially when its ace (i.e. Gerrit Cole) is on the disabled list — Pittsburgh has a number of young, MLB-ready arms that could step into the rotation down the stretch. In addition to Glasnow, we’ve seen Jameson Taillon, Steven Brault and Chad Kuhl each make his Major League debut this season. Taillon, of course, is presently on the big league disabled list with some fatigue in his right shoulder and will eventually need to have his innings capped after not pitching in 2014-15 due to injury. However, he could return later this month, and the Bucs are also hoping to get Cole back following the All-Star break as well (he’s already begun a Triple-A rehab assignment). Vogelsong, too, could be back in late July. As such, even without Locke and Niese, Pittsburgh could conceivably have a combination of Cole, Francisco Liriano, Vogelsong, Glasnow, Kuhl, Taillon and Brault make the bulk of their starts in the final two and a half of months of the season.

Acquired from the Mets this offseason in a one-for-one swap with Neil Walker, Niese has struggled through the worst season of his nine-year career in the Majors. The 29-year-old currently holds a 4.87 ERA — his highest full-season mark of any in his career — and is averaging more walks per nine innings (3.1) than he has since 2010. The main problem for Niese, though, is that he’s been astonishingly prone to the long ball with Pittsburgh, surrendering 19 home runs through his first 98 innings. That mark is already higher than the total number of homers he allowed in the 2011, 2013 and 2014 seasons (individually, not combined), and it sits one behind last year’s total of 20 homers despite the fact that he’s pitched 80 fewer innings.

Of course, there are some positives about Niese’s numbers as well. His 6.2 K/9 rate is an improvement over last year’s career-low rate, his 54.7 percent ground-ball rate is a slight improvement over his career-high, and his average of 89.2 mph on his heater is right in line with the marks he’s put up over the past few years. xFIP, which normalizes his current outlier home run rate, doesn’t actually feel that Niese has been significantly worse than he was in 2015.

Even if you’re squinting to try to salvage some hope for Niese’s season, though, the fact remains that he’s allowed considerably more runs and been much more hittable than the Pirates were hoping when acquiring him in that December trade. And, with young arms like Tyler Glasnow, Jameson Taillon, Chad Kuhl and Steven Brault all working their way up to the point of making their MLB debuts, the club has a number of younger options to deploy in favor of Niese and his $9MM salary.

That salary figures to stand as an obstacle to trading Niese, though Pittsburgh could absorb a portion of the remaining $4.23MM on that 2016 income in order to facilitate a trade. The Bucs also hold club options over Niese that are respectively valued at $10MM and $11MM for the upcoming 2017 and 2018 seasons, but Nesbitt writes that the club is likelier to buy out his 2017 option for $500K than pick it up in hope for a 2017 rebound.

His 2016 struggles notwithstanding, Niese was a solid mid-rotation arm for the Mets for many years prior to the trade. From 2012-15, Niese averaged 174 innings of 3.65 ERA ball in Queens, thriving due to strong ground-ball tendencies and a solid, if unspectacular 511-to-197 K/BB ratio. If the Bucs are willing to eat some cash, a team in need of pitching could roll the dice on Niese in hopes of a rebound that would make his club options look like a reasonable price to pay. From a speculative standpoint, the Orioles and Royals make some sense, as both are in need of rotation innings and could stand to add an arm that is controllable beyond the current campaign.

• The consensus among Mets officials is that pitcher Steven Matz will be on the big league roster at some point before the All-Star break, according to Mike Puma of the New York Post.  GM Sandy Alderson conceded that it’s “very possible” Matz already would be in a Mets uniform if it weren’t for a logjam in the rotation and he admitted that there’s “probably not” anything the Mets still have to see from him in the minors.  Meanwhile, the Mets continue to dangle Jon Niese and Dillon Gee, but interest has been limited, according to an club source.
• Justin Masterson will make a third rehab start in the minors on Wednesday which will allow him to work his way back from shoulder tendinitis.  The start for Triple-A Pawtucket will also buy the Red Sox time to make a decision on his future, as Brian MacPherson of the Providence Journal writes.  By rule, Boston can keep him on his rehab assignment for 30 days, which would lapse on June 29th.  Masterson was signed to a one-year, $9.5MM deal in December to be a starter, but he might only have a relief role waiting for him on the other side of his rehab.
• Scouts have been eyeing Red Sox left-hander Tommy Layne, Nick Cafardo of the Boston Globe writes. “With lefty relievers, get them while they’re effective. It can be fleeting. Look at [Craig] Breslow. He was a huge part of that 2013 bullpen and now he’s a mopup guy. Layne really comes right at you and battles you,” an AL scout told Cafardo.  If Boston doesn’t start winning soon, Cafardo writes that the left-hander will be a sought-after commodity.

• The Mets spoke with the Phillies about acquiring Jimmy Rollins, writes Rubin.  Rubin adds, “The pursuit since has been dismissed because Rollins does not want to leave Philadelphia.”
• The Mets are unenthusiastic about the available free agent shortstops, and plan to go the trade route to fill the position.  The Diamondbacks, Mariners, White Sox, and Cubs are viewed as viable trade partners.  Andy Martino of the New York Daily News says “it has been difficult, if not impossible” for the Mets and Cubs to agree on the value of Starlin Castro.  Meanwhile, Martino says Alexei Ramirez of the White Sox only emerged as a possibility within the past week.  Martino’s early read has the White Sox seeking the Mets’ top young starters and the Mets pitching their veterans.
• If the Mets are unable to acquire a shortstop, or go with a defense-first type like Didi Gregorius, they are likely to retain second baseman Daniel Murphy, writes Rubin.  If they get a shortstop who can hit, Murphy is more likely to be dealt if the Mets get a sufficient offer.  Rubin expects the Mets to wait on Murphy until after resolving their shortstop situation.
• The Mets seek a veteran lefty reliever to complement Josh Edgin in their bullpen.  They are also seeking a backup infielder, unless Wilmer Flores is bumped to that role.
• The Mets will also consider trading Dillon Gee, Jonathon Niese, or Bartolo Colon.

Here are some more notes specifically pertaining to pitchers…

• The Diamondbacks are likely to again scout Jeff Samardzija in the wake of Patrick Corbin's probable Tommy John surgery, reports Bruce Levine of 670thescore.com. However, Levine writes that the Cubs would likely ask for Archie Bradley in return, which would seemingly end conversations before they began.
• Ken Rosenthal of FOX Sports tweets that free agent closer Joel Hanrahan is up to 90-92 mph in his rehab from Tommy John and flexor tendon surgery and could sign with a team soon. Hanrahan is coming off a season in which he pitched just 7 1/3 innings for the Red Sox before undergoing surgery on May 16. He still has a ways to go on his velocity, as he averages 96-97 mph when he's at his best.
• Free agent left-hander Clayton Richard tells MLB Network Radio's Scott Braun that he underwent thoracic outlet syndrome surgery last month (Twitter link). Richard rejected an outright assignment from the Padres and elected free agency at season's end, but this seems to rule out the possibility that he'd be ready to pitch anytime soon.

Elsewhere in the National League:

• With the possibility Niese may open the season on the disabled list, Jenrry Mejia could join Daisuke Matsuzaka in the Mets' rotation with John Lannan earning a relief role, according to Rubin.
• The Diamondbacks are another team scrambling to fill a void in their starting rotation in the wake of the news from earlier today Patrick Corbin could be facing Tommy John surgery. GM Kevin Towers, however, plans to use in-house options like Randall Delgado, Archie Bradley, and Josh Collmenter rather than seek a trade immediately, tweets Jack Magruder of FOXSportsArizona.com.
• Noah Syndergaard, who remains in the Mets' Major League Spring Training camp, was the key component in last offseason's R.A. Dickey trade, writes Matt Ehalt of the Record. "I think eventually it got to the point where we needed Syndergaard," said J.P. Ricciardi, the Mets' special assistant to the GM. "I think in order to finish it off, we needed a younger, higher prospect to make us say, 'OK, it's worth trading a Cy Young Award winner.'"
• Pirates GM Neal Huntington says the team's bullpen depth is "a chance to move a guy that can go help someone else to add a piece," tweets the Pittsburgh Tribune-Review's Travis Sawchik. Huntington also gave a near-guarantee Edinson Volquez will be in the Pirates' starting rotation, Sawchik tweets.
• Troy E. Renck of the Denver Post contradicts a story from this morning the Rockies are in the market for right-handed bullpen help. A source tells Renck the club prefers to give Chad Bettis or Chris Martin a chance before pursuing a trade.
• Being forced to rush their young pitching prospects to the Majors has come back to haunt the Marlins, as Jacob Turner and Brad Hand (22 and 23, respectively) are now out of options, opines MLB.com's Joe Frisaro.
• The Dodgers have selected the contract of Justin Turner and will bring Chone Figgins to Australia, reports Dylan Herndandez of the Los Angeles Times (Twitter links). MLBTR's Tim Dierkes broke the news in February of Turner agreeing to a minor league contract with the Dodgers and now the 29-year-old will make $1MM as a reserve infielder. Figgins, who signed a minor league deal in January and is trying to make the squad as an utilityman, will be one of 30 players the Dodgers are taking on the trip (only 25 will be active on game day).

• In a piece for Grantland, Rany Jazayerli writes that the Royals almost got fair value for Myers, but the addition of three more prospects turns the trade into highway robbery for the Rays. He goes on to say that in shoving all his chips into the pot, Moore has done the same with his job security, possibly sacrificing the future for an illusory present.
• Royals GM Dayton Moore is "furious" over critiques insinuating that his motivation to make the deal was simply to preserve his job, writes Bob Nightengale of USA Today. In particular, Nightengale writes that Moore was livid over the reaction of ESPN's Keith Law (link included in earlier updates below). Moore calls any such allegations "very, very insulting."
• Baseball America's Jim Callis writes that Myers instantly becomes the Rays' top prospect, and that Odorizzi slots in at No. 5 between Hak-Ju Lee and Alex Colome. Montgomery fits into the mid-teens, and Leonard would rank in the 20-30 range. The trade essentially boils down to Myers-for-Shields, in Callis' mind, as Odorizzi is similar to Davis but at an earlier stage while Montgomery and Leonard are lottery tickets. Because of that, he doesn't think it's a terrible deal for the Royals.

Earlier reactions:

• One NL general manager called the trade "bold on both sides," ESPN.com's Jerry Crasnick reports. Some evaluators prefer the deal for the Royals, while others believe the Rays did better. An AL GM told Crasnick both teams did well. "I don't get all the online angst towards Kansas City," the GM added.
• Marc Topkin of the Tampa Bay Times has comments from many of the players involved in the deal. Odorizzi said he "definitely" feels ready for the MLB level, Topkin reports.
• ESPN.com's Jayson Stark points out that Myers is the first person to be named Baseball America's minor league player of the year and be traded before playing an MLB game for the organization with which he won the award.
• Shields told Jim Bowden on MLB Network Radio that he'd be open to an extension of the Royals wanted to discuss one. "No doubt about it," Shields said (Twitter link).
• Approximately 32,000 MLBTR readers voted on the deal and nearly half believe the Rays won. Another 32% say both teams won the deal and 17% say the Royals won.
• It would have taken Jon Niese and Zack Wheeler for the Mets to obtain a similar package to the one the Rays obtained, Andy Martino of the New York Daily News reports (on Twitter). Matt Cerrone of MetsBlog.com first reported this news four days ago.
• Though the trade reflects a sense of urgency from the Royals, Bob Dutton of the Kansas City Star doesn't get the sense that GM Dayton Moore is on the hot seat (Twitter link).
• ESPN.com's Buster Olney suggests the Rays will delay Myers' arrival at the MLB level to ensure he doesn't obtain a full year of service time in 2013. It's also possible that the Rays could look to extend the promising outfielder, Olney suggests. I agree with both of Olney's point here. There's no way the Rays can allow Myers to get a full year of service in 2013.
• Six pro scouts don't consider the trade one-sided, J.J. Cooper of Baseball America reports. The Royals don't deserve the criticism being directed their way, the scouts told Baseball America.
• Shields will obtain a $750K trade bonus as part of the deal, Jon Paul Morosi of FOX Sports reports (on Twitter).
• One GM told Ken Rosenthal of FOX Sports that "Myers is no slam dunk" and added that this is "far from a lopsided deal." Rosenthal suggests teams like the Royals can too often get fixated on their prospects and pass on opportunities to compete.
• The Royals tried to trade Myers for Shields straight up, but the Rays said no, Yahoo's Jeff Passan writes (Twitter links). The Royals also tried trading Myers to Oakland for Brett Anderson only to be turned down, Passan writes.
• In Passan's view Royals general manager Dayton Moore made a desperate trade that will define his tenure as GM in Kansas City. Still, Passan writes, it's hard to blame the Royals for attempting to win now.
• The Tigers weren't happy to see the Royals acquire Shields, Danny Knobler of CBSSports.com reports. Shields is a difference maker who will make the Royals better, Knobler writes.
• The Rangers had hoped to add Zack Greinke or Shields this winter, but lost out on both this past weekend, Knobler reports (on Twitter).
• Bob Dutton of the Kansas City Star won't be surprised if the Royals seek a low-cost outfielder in free agency (Twitter link). After trading Myers, the club might have interest in spending $1MM or less on a rebound candidate.
• It's an outstanding day for Rays fans, ESPN.com's Keith Law writes (Insider only). Conversely, this could be the deal that brings Moore's time in Kansas City to an end in Law's view.
• My thoughts: the Rays were justified in trading Shields and Davis for Myers and the other prospects because they obtained more long-term value. While the Royals surrendered a lot, they addressed their most pressing weakness — starting pitching — in a meaningful way and increased their chances of competing in 2013. The Royals have much more rotation depth than they did two months ago. Ervin Santana, Jeremy Guthrie, Shields and Davis make the Kansas City staff better. Yet you can make the case that they overpaid every time they acquired a new arm.

New York would have to be "knocked out" to trade Niese, who is not yet arbitration eligible and owns 286 strikeouts and 106 walks in 331 innings over the past two seasons. His ERA is a pedestrian 4.30 in that time, though his 49.5% groundball rate and advanced metrics like FIP (3.75) and SIERA (3.67) tell a different story.

At the Winter Meetings, we heard that the Mets would be willing to move any player other than David Wright, and several teams showed interest in the 25-year-old Niese, viewing him as a potentially cheaper alternative to Gio Gonzalez. Reports since then say that there have been "no significant talks," however, and Crasnick's strong words suggest that Niese won't be easy to acquire at all.

• Jonathon Niese "is believed to be available in a package built around" Rockies outfielder Seth Smith, reports Tracy Ringolsby of FOX Sports.  Smith's name has been whispered in the trade rumors all winter and he could be even more expendable now that Colorado has agreed to terms with Michael Cuddyer.  The Mets hadn't had any "significant" talks about Niese, though the Rockies were known to be one of the several teams interested in the young southpaw.
• Rockies GM Dan O'Dowd "is having a very good winter. If he can add another strong arm or two, he has a chance at a great winter," writes Scott Miller for CBSSports.com.  Miller also examines how Cuddyer's clubhouse presence was an important factor in the Rockies' decision to sign him.
• The Padres have the payroll space to trade for an available slugger like Carlos Quentin, writes Ken Rosenthal and Jon Paul Morosi of FOX Sports.  With free agent hitters wary of coming to Petco Park, the trade market is San Diego's best avenue for finding a bat, Rosenthal/Morosi note.  They also mention Quentin's past with Padres GM Josh Byrnes in Arizona, though it was Byrnes who dealt Quentin to the White Sox in 2007 when Byrnes was the Diamondbacks' general manager.
• There is no risk of Frank McCourt trying to keep ownership the Dodgers, reports Bill Shaikin of the Los Angeles Times.  Doing so "would put hundreds of millions of dollars at risk to try a 'hail Mary' strategy," Shaikin writes.
• Padres owner Jeff Moorad should speed up his purchase of the team from John Moores, opines Tim Sullivan of the San Diego Union-Tribune.

• The Nationals are "all but out" of the Gonzalez sweepstakes, according to Bill Ladson of MLB.com. The Athletics' asking price is "way out of line," Ladson hears.
• The Mets told the A's they won't include Jonathon Niese, Ike Davis, Matt Harvey, Jenrry Mejia or Jeurys Familia in a deal for Gio Gonzalez, tweets Jon Heyman of CBSSports.com.
• The Tigers are on the "outskirts" of the Gonzalez sweepstakes, tweets ESPN.com's Jerry Crasnick. They aren't upbeat about their chances of trading for him.
• The A's would love to get a future third baseman in a deal for Gonzalez, tweets Jon Paul Morosi of FOX Sports. Rangers prospect Mike Olt is one possibility.
• The A's continue seeking a huge package for Gonzalez, Jon Heyman of CBSSports.com tweets. Though the Yankees "love" him, they aren't eager to surrender prospects such as Jesus Montero, Manny Banuelos and Dellin Betances.
• The Rangers, who are pursuing Gonzalez and Andrew Bailey, can be expected to try to trade for Gonzalez or Matt Garza if they don't win the bidding on Yu Darvish, tweets Ken Rosenthal of FOX Sports.
• ESPN.com's Buster Olney also reports that the Rangers are likely to pursue Gonzalez if they miss out on Darvish. He tweets that 20-year-old left-hander Martin Perez would "almost have to be" in a deal between the A's and Rangers.
• The market for Gonzalez and John Danks may pick up once the winner in the Darvish bidding is announced and the Rays decide which of their starting pitchers are available, tweets ESPN.com's Jayson Stark.

Niese, 25, told Andy Martino of The New York Daily News that the front office reached out to him last week after the trade rumors became public to assure him they still want him on their club (Twitter link). Three or four teams still have interest in trading for him according to CBSSports.com's Jon Heyman (on Twitter), and the Mets seek a young catcher and young pitchers in return. That price is too high for some clubs, says Martino (on Twitter). The Rockies and Yankees were said to have some interest in Niese last week.

Although his 4.40 ERA in 2011 is nothing special, Niese did post impressive peripheral stats in his 157 1/3 innings: 7.89 K/9, 2.52 BB/9, and 51.5% grounders. He's had trouble staying healthy in recent years thanks to hamstring and oblique problems, which is why he's never thrown more than 180 innings in a season, majors or minors. Niese is under team control for another four years, the final three as an arbitration-eligible player.

• The Rockies "immediately contacted" Hiroki Kuroda's agent following the Street trade, writes Troy Renck of the Denver Post. With $7MM freed up, Colorado has a number of options. Renck once again mentions Colorado's interest in Michael Cuddyer as well.
• The Rockies like Jonathon Niese a lot, but have had no conversations to date with the Mets, according to Renck. New York is open to moving the 25-year-old lefty.
• The Pirates are keeping in touch with the Rox on Ian Stewart, tweets Jon Paul Morosi of FOX Sports.
• Dylan Hernandez of the L.A. Times tweets that the Dodgers are keeping in touch with the agent for Mike MacDougal. GM Ned Colletti is also talking with other relievers, but talks with MacDougal are the furthest along.
• The Dodgers have "no interest" in bringing back Manny Ramirez, writes Hernandez's colleague Steve Dilbeck.

• Teams have been inquiring about Mike Pelfrey as well, but the Mets were underwhelmed by the offers, tweets Martino.
• The Mets would like a placeholder starter for their big league club in addition to a prospect for Niese, according to Mike Puma of the New York Post and Sherman (Twitter links). Sherman points to Jason Hammel as a possible match, though Troy Renck of the Denver Post (on Twitter) hears the Rockies haven't had discussions with the Mets.
• The Red Sox aren't a match for Niese, says Alex Speier of WEEI.
• The Padres aren't interested in Niese, a source tells Martino (Twitter link).
• Andy Martino hears the Mets would have to get a lot if they were to trade Niese, and aren't close to anything. Two team officials that spoke to Martino don't expect a trade today (Twitter links). Andy McCullough of the Star-Ledger adds, via Twitter, that the asking price for Daniel Murphy is also high.
• The Blue Jays are also talking to the Mets about Niese, tweets Sherman. The Yankees have also called, but Sherman isn't sure how serious they are (Twitter link).
• The Mets are hoping to get multiple pieces in return for Niese, tweets Jon Heyman of MLB Network. They're interested in adding a catcher, an infielder, and prospects.
• The Red Sox have talked to the Mets and have interest in Niese, says Sherman.
• The Padres and Rockies are among the teams interested in Niese, tweets Sherman.  The Padres could get in on Niese but have not engaged yet, adds Andy Martino of the New York Daily News.

Luke Adams contributed to this post.