The Miami Marlins have not signed any of their players to contract extensions since 2022. That should change this offseason, not only to lock them up for the future, but also to increase the team’s luxury tax payroll and avoid a potential grievance from the Major League Baseball Players Association.
In a report from The Athletic, Brittany Ghiroli said that there was a large gap between Marlins and Kyle Stowers in their recent negotiations, which have since ceased.Â
Expect the Marlins to now turn their attention to potential long-term building blocks like outfielder Jakob Marsee, catcher Joe Mack and pitcher Eury Pérez.
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Eury Pérez
Fish On First has confirmed that the Marlins and Pérez’s camp were engaged in extension talks last spring training. The expectation is talks will pick up again soon.
Pérez is coming off a season where he posted a 4.25 ERA, 3.67 FIP, 9.91 K/9 and 3.02 BB/9 through 95 ⅓ innings pitched. He made all of his scheduled starts after completing Tommy John surgery rehab and his average fastball velocity actually increased slightly from where it had been as a rookie (from 97.5 mph to 97.9 mph). The expectation is that the Marlins righty will have no innings limit and will be full throttle in 2026.
The 22-year-old has one more season to go before he’s eligible for arbitration and he’s four seasons away from free agency. A couple contract extension comparisons are Bryan Bello (Boston Red Sox), who signed for six years, $55M, and Spencer Strider’s six-year, $75M extension with the Atlanta Braves.
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Jakob Marsee
Marsee, 24, was one of four players acquired in the trade that sent Luis Arráez to the San Diego Padres. His first taste of the big leagues far exceeded expectations, as Marsee slashed .292/.363/.478/.842 with five home runs, 33 RBI and 14 stolen bases while playing all three outfield spots.
It has become increasingly common for players to be extended with only a partial season of MLB experience. However, in most of those cases, the player was considered an elite prospect before debuting. Marsee, on the other hand, wasn’t even ranked on Top 100 lists.
The comparison that comes closest to being relevant to Marsee is Kristian Campbell of the Boston Red Sox. Just days after making his debut, he agreed to an eight-year, $60M guarantee and the Red Sox got club options for years nine and ten. Applying the same contract structure to Marsee would fully buy out two of his free agent years, with options covering two more if he’s still an impactful player past age 32.
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Joe Mack
Mack began the 2025 season in Double-A, but was quickly promoted to Triple-A, finishing the season slashing .257/.338/.475/.813 with 21 home runs, 58 RBI and a 120 wRC+ between both levels. Just as importantly, he is a fantastic defensive catcher, particularly when it comes to throwing out baserunners attempting to steal. The Marlins’ search for a high-quality successor to J.T. Realmuto has been ongoing for seven years, but may finally be coming to an end here.
Likely the only way Mack makes the 2026 Opening Day roster is if an extension is agreed to ahead of time. Similar to Campbell’s case, the Marlins would delay announcing the deal until the season gets underway to keep him eligible to earn them a future Prospect Promotion Incentive draft pick.
Eight extensions have been handed out to catchers at any point of the pre-arb process. Keibert Ruiz signed with the Washington Nationals for eight years, $50M. That contract has aged poorly from the team’s perspective as Ruiz has a 79 wRC+ and negative fWAR through the first three years. Most recently, Samuel Basallo got eight years, $67M from the Baltimore Orioles.