The Mets are willing to trade from their major league infield as they look for help elsewhere on the roster, reports Will Sammon of The Athletic. Obviously, Francisco Lindor and Pete Alonso aren’t going anywhere. Nor are they likely to trade Jeff McNeil, who is having a strong season as a multi-positional contributor. If a trade comes together, it’d involve one of their four younger big league infielders: Brett Baty, Ronny Mauricio, Mark Vientos or Luisangel Acuña.
Those players have found themselves in trade rumors at least dating back to last offseason. The 25-year-old Baty has long seemed the likeliest to move, as the former top prospect has not become the offensive player that many evaluators envisioned. The lefty hitter owns a .236/.292/.419 batting line across 251 plate appearances this season. While those are the best numbers of his career, they’re essentially league average. Baty has gotten there in rather streaky fashion. He had a terrible April that led the Mets to briefly demote him back to Triple-A once McNeil returned from a season-opening injured list stint. Baty hit well upon being recalled in May, tanked in June, and is back to swinging the bat well of late.
A natural third baseman, Baty has added second base to his defensive repertoire this season. He has graded as a league average second baseman with slightly above-average marks at the hot corner in a small sample. Baty has been a useful player overall, but he still hasn’t established himself as a first-division regular. He won’t reach arbitration eligibility for another year after this one and is under club control through the 2029 season.
Vientos, also 25, seemed to establish himself as a core piece last season. He connected on 27 homers with an excellent .266/.322/.516 slash line in the regular season. Vientos hit .327 and added five more longballs in 13 playoff games. He hasn’t gotten going offensively at any point this year. The righty hitter has slumped to a .221/.275/.352 showing in 265 plate appearances. Vientos’ average exit velocity and hard contact rate aren’t much different than they were last season, but his bat speed is down a tick and his actual power production has plummeted.
That’s particularly concerning for a player who doesn’t have much in his game to fall back upon. Vientos isn’t a great athlete and he’s a well below-average defensive third baseman. He should ideally be at first base, but Alonso’s presence means that won’t happen for at least the rest of this season (and potentially beyond if the Mets re-sign Alonso in free agency again). He’s working primarily as a designated hitter while Jesse Winker is battling back problems. Vientos is controllable for another four seasons, so trading him now would be a sell-low move, but he’s out of minor league options and not providing much value at the moment.
Mauricio, a toolsy switch-hitter with a very aggressive approach, is in his first season back from an ACL tear. He’s hitting .218/.288/.376 with four homers in 31 big league contests. The 6’4″ infielder is working as the primary third baseman with Baty mostly at the keystone. The 24-year-old Mauricio would exhaust his final option year if he spends another three days in Triple-A this season. He’s controllable for at least four more seasons.
Acuña, 23, has been a light-hitting utility player. He’s hitting .240/.293/.286 without a home run in 169 trips to the plate. His .260/.303/.356 slash line in 640 career Triple-A plate appearances isn’t much better. He’s the best defender of this group who has only moved off shortstop in deference to Lindor. Maybe another team feels there’s enough defensive ability that Acuña could be a low-end regular at shortstop. He has an option remaining but — similar to Mauricio — would exhaust it if he spends another two days in Triple-A this year. That probably played into the team’s decision to recall him just before the All-Star Break. He’s only really getting opportunities against left-handed pitching, so his current usage doesn’t give him much opportunity to improve at the plate.
With the possible exception of Baty, each of these players probably has less trade value than they would have had over the winter. There’d nevertheless still be teams interested in all of them, but they’re not likely to headline a deal for an impact player. Sammon writes that the Mets are generally prioritizing bullpen upgrades, and it’d hardly be a surprise if someone from this group intrigued a team like the Pirates (David Bednar, Dennis Santana) or Rockies (Jake Bird) that is shopping relief pitching and in need of short-term offensive help.