The Marlins 40-man roster is currently at 40 players.
MLB Active Roster
Pitchers (16): Sandy Alcantara, Anthony Bass, Anthony Bender, Richard Bleier, Edward Cabrera, Paul Campbell, Daniel Castano, Dylan Floro, Sean Guenther, Elieser Hernandez, Jesús Luzardo, Luís Madero, Steven Okert, Zach Pop, Trevor Rogers, Zach Thompson
Injured List (10): Jesús Aguilar (left knee inflammation), Jorge Alfaro (left calf strain), Brian Anderson (capsular tear in left shoulder), Jon Berti (concussion), Jeff Brigham (right biceps inflammation), Garrett Cooper (torn left UCL—Tommy John surgery), José Devers (labrum tear in right shoulder), Jorge Guzman (right elbow soreness), Pablo López (60-day), Cody Poteet (right knee sprain)
Triple-A Roster (Jacksonville Jumbo Shrimp)
Pitchers (16): Jason Alexander, Andrew Bellatti, Parker Bugg, Cody Carroll, Tommy Eveld, Jake Fishman, Braxton Garrett+, Alberto Guerrero, Preston Guilmet, Brandon Leibrandt, Max Meyer, Bryan Mitchell, Shawn Morimando, Nick Neidert+, Austin Pruitt, Rob Zastryzny
Injured List (6): Brett Eibner (60-day), Jordan Holloway+ (7-day), Luis Marté (60-day), Brian McKenna (60-day), Mason Melotakis (7-day), Sixto Sánchez+ (capsular tear in right shoulder)
Players with prior MLB regular season experience
+40-man roster
2021 End-of-Season Double-A Roster (Pensacola Blue Wahoos)
Injured List (6): Tanner Andrews, Jake Eder (torn left UCL—Tommy John surgery), Jerar Encarnacíon+, Bubba Hollins, Zack Kone, José Mesa Jr.