The New York Mets hired J.D. Martinez as special adviser to baseball operations, the club announced Monday, installing a 21-year veteran and five-time All-Star into a newly created front-office role while the roster he'll help evaluate remains in flux. Martinez, 36, last played in September and carries a .285 career batting average across seven clubs. He joins a baseball operations department led by president David Stearns, who inherited a $265M payroll and a lineup that ranked 22nd in wRC+ after the All-Star break.
Martinez's hire follows a pattern Stearns established in Milwaukee, where he cycled recently retired position players into advisory and development roles before moving them onto coaching staffs or into scouting pipelines. The Mets now employ three former players in baseball operations—Martinez joins quality control coach Eric Chavez and senior adviser Jeremy Hefner—creating a bridge between the analytic infrastructure Stearns imported from the Brewers and the clubhouse culture manager Carlos Mendoza is trying to stabilize after a 89-loss season. Martinez's specialty was always plate discipline: 12.1% career walk rate, 19.8% strikeout rate, numbers that mark him as someone who understood sequencing and pitcher tendencies at a level most hitters never reach.
What matters here is timing and optionality. The Mets face $186M in committed payroll for 2025 before arbitration, with Pete Alonso unsigned and Jose Iglesias the only everyday player locked beyond this season. Stearns has refused to commit to Alonso at anything near the $200M range Scott Boras is reportedly seeking, and the first-base market has already moved—Christian Walker to Houston for three years, $60M, Paul Goldschmidt to the Yankees for one year, $12.5M. Martinez spent 2023 advising the Dodgers' hitting infrastructure before signing a one-year deal with the Mets last winter, so he knows both the analytic language Stearns speaks and the transactional realities of aging sluggers trying to extract value from teams with budget constraints. If Alonso walks, the Mets need someone in the room who can identify mid-market bats that fit Citi Field's dimensions and Mendoza's situational preferences. Martinez hit .271/.321/.572 in 85 games for New York last season before the Mets non-tendered him in November, a clean decision that apparently didn't burn the relationship.
The role also positions Martinez for a coaching transition if he wants it. Stearns typically moves advisers onto the major-league staff within 18 months—Chavez went from quality control to hitting coach in Milwaukee after one season in the video room—and the Mets' hitting infrastructure remains unsettled. Hitting coach Eric Chavez survived the managerial transition from Buck Showalter to Mendoza, but the Mets ranked 23rd in team OPS and 26th in runs scored, numbers that don't improve without either new personnel or new process. Martinez's presence gives Stearns a credible internal candidate if he decides Chavez's system isn't translating, while also providing daily access to a hitter who faced 43 different pitchers throwing sweepers above 2,800 rpm last season and still posted a .532 slugging percentage.
Watch the January amateur draft meetings, where Martinez will reportedly sit in on advance scouting sessions as the Mets prepare for the 2025 draft with the 14th overall pick. Watch also for his involvement in spring training, where Stearns typically tests advisers by assigning them specific hitters to shadow for mechanical adjustments. The Alonso negotiation runs through February, and if it collapses, the Mets will pivot to a multi-player solution that someone in that front office needs to have already modeled. Martinez has been on both sides of those conversations.
The move costs nothing against the luxury tax and preserves flexibility while adding institutional knowledge from someone who played 140 games last season. In a winter where the Mets have been conspicuously quiet—no major signings, no trades, just small extensions and coaching shuffles—hiring Martinez is the kind of low-cost, high-optionality decision that keeps doors open. The front office grows by one. The coaching staff might grow by one next spring. The roster decisions get informed by someone who just saw 89 games of this team from the inside.
The takeaway
Martinez hire gives Stearns a credible offensive voice inside baseball operations while preserving budget flexibility ahead of Alonso's decision.
metsfront officecoachingoffseasondavid stearnsroster construction
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