Marlins Roster & Staff
Transactions
| Date | Transaction |
| 05/31/25 | Miami Marlins activated RHP Declan Cronin from the 15-day injured list. |
| 05/31/25 | Miami Marlins activated SS Xavier Edwards from the 10-day injured list. |
| 05/31/25 | Miami Marlins optioned CF Victor Mesa Jr. to Jacksonville Jumbo Shrimp. |
| 05/31/25 | Miami Marlins optioned RHP Declan Cronin to Jacksonville Jumbo Shrimp. |
| 05/30/25 | Miami Marlins designated LF Ronny Simon for assignment. |
| 05/30/25 | Miami Marlins activated CF Dane Myers from the 10-day injured list. |
| 05/30/25 | Miami Marlins designated 1B Matt Mervis for assignment. |
| 05/30/25 | Miami Marlins selected the contract of RF Heriberto Hernandez from Jacksonville Jumbo Shrimp. |
| 05/30/25 | Miami Marlins selected the contract of SS Jack Winkler from Jacksonville Jumbo Shrimp. |
| 05/29/25 | Miami Marlins sent SS Xavier Edwards on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/29/25 | Miami Marlins optioned 3B Graham Pauley to Jacksonville Jumbo Shrimp. |
| 05/27/25 | Miami Marlins sent RHP Declan Cronin on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/27/25 | Miami Marlins sent RHP Declan Cronin on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/27/25 | Miami Marlins sent CF Dane Myers on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/26/25 | Miami Marlins placed CF Derek Hill on the 10-day injured list. Left wrist sprain. |
| 05/26/25 | Miami Marlins recalled CF Victor Mesa Jr. from Jacksonville Jumbo Shrimp. |
| 05/24/25 | Miami Marlins transferred C Rob Brantly from the 10-day injured list to the 60-day injured list. Right lat strain. |
| 05/24/25 | Miami Marlins selected the contract of RHP Janson Junk from Jacksonville Jumbo Shrimp. |
| 05/24/25 | Miami Marlins optioned RHP Lake Bachar to Jacksonville Jumbo Shrimp. |
| 05/20/25 | Miami Marlins sent RHP Declan Cronin on a rehab assignment to Jupiter Hammerheads. |
| 05/20/25 | Miami Marlins sent RHP Eury Pérez on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/20/25 | Miami Marlins sent RHP Eury Pérez on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/18/25 | Miami Marlins placed SS Xavier Edwards on the 10-day injured list retroactive to May 15, 2025. Left mid back strain. |
| 05/18/25 | Miami Marlins activated 2B Otto Lopez from the 10-day injured list. |
| 05/16/25 | Miami Marlins sent 2B Otto Lopez on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/14/25 | Miami Marlins activated LHP Ryan Weathers from the 15-day injured list. |
| 05/14/25 | Miami Marlins optioned LHP Anthony Veneziano to Jacksonville Jumbo Shrimp. |
| 05/12/25 | Miami Marlins activated CF Derek Hill from the 10-day injured list. |
| 05/12/25 | Miami Marlins placed CF Dane Myers on the 10-day injured list retroactive to May 11, 2025. Right oblique strain. |
| 05/07/25 | Miami Marlins sent CF Derek Hill on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/07/25 | Miami Marlins recalled LHP Cade Gibson from Jacksonville Jumbo Shrimp. |
| 05/07/25 | Miami Marlins optioned RHP George Soriano to Jacksonville Jumbo Shrimp. |
| 05/04/25 | Miami Marlins placed 2B Otto Lopez on the 10-day injured list retroactive to May 3, 2025. Right ankle sprain. |
| 05/04/25 | Miami Marlins activated C Nick Fortes from the 10-day injured list. |
| 05/04/25 | Miami Marlins activated C Nick Fortes from the 10-day injured list. |
| 05/02/25 | Miami Marlins sent LHP Ryan Weathers on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/02/25 | Miami Marlins sent LHP Ryan Weathers on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/02/25 | Miami Marlins signed free agent 2B Cesar Garcia to a minor league contract. |
| 05/02/25 | Miami Marlins sent LHP Ryan Weathers on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/02/25 | Miami Marlins recalled RHP Valente Bellozo from Jacksonville Jumbo Shrimp. |
| 05/01/25 | Miami Marlins sent C Nick Fortes on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/01/25 | Miami Marlins sent C Nick Fortes on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/01/25 | Miami Marlins sent C Nick Fortes on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 05/01/25 | Miami Marlins optioned RHP Luarbert Arias to Jacksonville Jumbo Shrimp. |