Marlins Roster & Staff
Transactions
| Date | Transaction |
| 03/30/26 | Miami Marlins activated SS Leo Jiménez. |
| 03/30/26 | Miami Marlins optioned 3B Deyvison De Los Santos to Jacksonville Jumbo Shrimp. |
| 03/29/26 | Miami Marlins designated RHP Garrett Acton for assignment. |
| 03/29/26 | Toronto Blue Jays traded SS Leo Jiménez to Miami Marlins for SS Dub Gleed and Future Considerations. |
| 03/29/26 | Toronto Blue Jays traded SS Leo Jiménez to Miami Marlins for SS Dub Gleed and Future Considerations. |
| 03/28/26 | Miami Marlins placed LF Christopher Morel on the 10-day injured list retroactive to March 25, 2026. Left oblique strain. |
| 03/28/26 | Miami Marlins recalled 3B Deyvison De Los Santos from Jacksonville Jumbo Shrimp. |
| 03/25/26 | Miami Marlins placed LF Kyle Stowers on the 10-day injured list retroactive to March 22, 2026. Right hamstring strain. |
| 03/25/26 | Miami Marlins placed SS Maximo Acosta on the 10-day injured list retroactive to March 22, 2026. Left oblique strain. |
| 03/25/26 | Miami Marlins placed RHP Adam Mazur on the 60-day injured list. Right elbow surgery. |
| 03/25/26 | Miami Marlins signed free agent LF Austin Slater. |
| 03/25/26 | Miami Marlins placed LF Esteury Ruiz on the 10-day injured list retroactive to March 22, 2026. Left oblique strain. |
| 03/23/26 | Miami Marlins sent RHP Zach McCambley outright to Jacksonville Jumbo Shrimp. |
| 03/22/26 | Miami Marlins released RHP Chase Centala. |
| 03/22/26 | RHP Zach McCambley returned to Miami Marlins from Philadelphia Phillies. |
| 03/22/26 | Miami Marlins optioned LHP Cade Gibson to Jacksonville Jumbo Shrimp. |
| 03/21/26 | SS Payton Green assigned to Miami Marlins. |
| 03/21/26 | 3B Tony Bullard assigned to Miami Marlins. |
| 03/20/26 | Miami Marlins optioned LHP Braxton Garrett to Jacksonville Jumbo Shrimp. |
| 03/17/26 | C Adrian Bello assigned to Miami Marlins. |
| 03/17/26 | SS Cody Schrier assigned to Miami Marlins. |
| 03/16/26 | RHP Jake Clemente assigned to Miami Marlins. |
| 03/16/26 | Miami Marlins optioned RHP Garrett Acton to Jacksonville Jumbo Shrimp. |
| 03/16/26 | Miami Marlins optioned RHP Bradley Blalock to Jacksonville Jumbo Shrimp. |
| 03/15/26 | OF Luis Leon assigned to Miami Marlins. |
| 03/15/26 | Miami Marlins optioned RHP Ryan Gusto to Jacksonville Jumbo Shrimp. |
| 03/15/26 | Miami Marlins optioned C Joe Mack to Jacksonville Jumbo Shrimp. |
| 03/14/26 | SS Yiddi Cappe assigned to Miami Marlins. |
| 03/14/26 | 1B Julio Henriquez assigned to Miami Marlins. |
| 03/14/26 | 3B Yoffry Solano assigned to Miami Marlins. |
| 03/14/26 | C Nixon Chirinos assigned to Miami Marlins. |
| 03/14/26 | C Jeremy Almonte assigned to Miami Marlins. |
| 03/14/26 | LHP Kaiden Wilson assigned to Miami Marlins. |
| 03/14/26 | LF Jose Monserrate assigned to Miami Marlins. |
| 03/13/26 | OF Luis Cova assigned to Miami Marlins. |
| 03/11/26 | SS Luis Arana assigned to Miami Marlins. |
| 03/10/26 | RHP Riskiel Tineo assigned to Miami Marlins. |
| 03/10/26 | SS Fabian Lopez assigned to Miami Marlins. |
| 03/09/26 | RHP Chase Centala assigned to Miami Marlins. |
| 03/09/26 | RHP Juan Reynoso assigned to Miami Marlins. |
| 03/09/26 | 3B Wilfredo Lara assigned to Miami Marlins. |
| 03/09/26 | SS Jake McCutcheon assigned to Miami Marlins. |
| 03/09/26 | RHP Xavier Cardenas III roster status changed by Miami Marlins. |
| 03/09/26 | OF Eric Rataczak assigned to Miami Marlins. |
| 03/09/26 | RHP Xavier Cardenas III assigned to Miami Marlins. |
| 03/08/26 | SS Echedry Vargas assigned to Miami Marlins. |
| 03/08/26 | Miami Marlins optioned 3B Deyvison De Los Santos to Jacksonville Jumbo Shrimp. |
| 03/08/26 | Miami Marlins optioned RHP William Kempner to Jacksonville Jumbo Shrimp. |
| 03/08/26 | Miami Marlins optioned LHP Dax Fulton to Jacksonville Jumbo Shrimp. |
| 03/08/26 | Miami Marlins optioned RHP Josh White to Jacksonville Jumbo Shrimp. |
| 03/08/26 | Miami Marlins optioned SS Jared Serna to Jacksonville Jumbo Shrimp. |
| 03/07/26 | SS Emilio Barreras assigned to Miami Marlins. |
| 03/07/26 | SS Starlyn Caba assigned to Miami Marlins. |
| 03/07/26 | LHP Justin Storm assigned to Miami Marlins. |
| 03/07/26 | RHP Jadon Williamson assigned to Miami Marlins. |
| 03/07/26 | RF John Cruz assigned to Miami Marlins. |
| 03/06/26 | RHP Gabe Bierman assigned to Miami Marlins. |
| 03/06/26 | 2B Cody Morissette assigned to Miami Marlins. |
| 03/06/26 | SS Dub Gleed assigned to Miami Marlins. |
| 03/06/26 | SS Cam Clayton assigned to Miami Marlins. |
| 03/06/26 | OF Jacob Jenkins-Cowart assigned to Miami Marlins. |
| 03/05/26 | OF Micah McDowell roster status changed by Miami Marlins. |
| 03/05/26 | OF Micah McDowell assigned to Miami Marlins. |
| 03/05/26 | C Nestor Rios assigned to Miami Marlins. |
| 03/03/26 | RF PJ Morlando assigned to Miami Marlins. |
| 03/03/26 | C Wilson Weber assigned to Miami Marlins. |
| 03/03/26 | LHP Joey Volini assigned to Miami Marlins. |
| 03/03/26 | C Wilson Weber roster status changed by Miami Marlins. |
| 03/02/26 | CF Mark Coley II assigned to Miami Marlins. |
| 03/02/26 | 3B Jesus Hernandez assigned to Miami Marlins. |