Marlins Roster & Staff
Transactions
| Date | Transaction |
| 07/29/25 | Miami Marlins selected the contract of OF Troy Johnston from Jacksonville Jumbo Shrimp. |
| 07/29/25 | Miami Marlins traded C Nick Fortes to Tampa Bay Rays for LF Matthew Etzel. |
| 07/29/25 | Miami Marlins traded C Nick Fortes to Tampa Bay Rays for LF Matthew Etzel. |
| 07/28/25 | Miami Marlins signed OF Cam Cannarella. |
| 07/28/25 | C Nick Fortes roster status changed by Miami Marlins. |
| 07/28/25 | Miami Marlins activated RHP Lake Bachar from the paternity list. |
| 07/28/25 | Miami Marlins optioned RHP Freddy Tarnok to Jacksonville Jumbo Shrimp. |
| 07/25/25 | Miami Marlins placed RHP Lake Bachar on the paternity list. |
| 07/25/25 | Miami Marlins recalled RHP Freddy Tarnok from Jacksonville Jumbo Shrimp. |
| 07/23/25 | Miami Marlins signed LHP Hayden Cuthbertson. |
| 07/22/25 | Miami Marlins signed RHP Jake Clemente. |
| 07/22/25 | Miami Marlins signed LHP Joey Volini. |
| 07/22/25 | Miami Marlins signed RHP Carson Laws. |
| 07/22/25 | Miami Marlins signed 3B Josh Hogue. |
| 07/22/25 | Miami Marlins signed SS Emilio Barreras. |
| 07/22/25 | Miami Marlins signed OF Brandon Compton. |
| 07/22/25 | Miami Marlins signed RHP Chase Renner. |
| 07/22/25 | Miami Marlins signed RHP Xavier Cardenas III. |
| 07/22/25 | Miami Marlins signed 1B Chris Arroyo. |
| 07/22/25 | Miami Marlins signed 2B Jake McCutcheon. |
| 07/22/25 | Miami Marlins signed LHP RJ Shunck. |
| 07/22/25 | Miami Marlins signed RHP Peyton Fosher. |
| 07/22/25 | Miami Marlins placed CF Derek Hill on the 10-day injured list. Left middle finger sprain. |
| 07/22/25 | Miami Marlins signed RHP Cannon Pickell. |
| 07/22/25 | Miami Marlins signed SS Drew Faurot. |
| 07/22/25 | Miami Marlins signed OF Max Williams. |
| 07/22/25 | Miami Marlins signed RHP Jadon Williamson. |
| 07/22/25 | Miami Marlins signed C Wilson Weber. |
| 07/22/25 | Miami Marlins recalled 2B Jack Winkler from Jacksonville Jumbo Shrimp. |
| 07/21/25 | Miami Marlins signed SS Aiva Arquette. |
| 07/20/25 | Miami Marlins signed LHP Kaiden Wilson. |
| 07/17/25 | Miami Marlins transferred RHP Jesus Tinoco from the 15-day injured list to the 60-day injured list. Right forearm strain. |
| 07/17/25 | Miami Marlins optioned RHP Michael Petersen to Jacksonville Jumbo Shrimp. |
| 07/17/25 | Atlanta Braves traded RHP Michael Petersen to Miami Marlins for cash. |
| 07/16/25 | Miami Marlins sent C Rob Brantly outright to Jacksonville Jumbo Shrimp. |
| 07/14/25 | Miami Marlins designated C Rob Brantly for assignment. |
| 07/14/25 | Miami Marlins activated C Rob Brantly from the 60-day injured list. |
| 07/13/25 | Miami Marlins placed 3B Connor Norby on the 10-day injured list retroactive to July 12, 2025. Left wrist inflammation. |
| 07/13/25 | Miami Marlins recalled 3B Graham Pauley from Jacksonville Jumbo Shrimp. |
| 07/11/25 | Los Angeles Dodgers claimed RHP Nick Nastrini off waivers from Miami Marlins. |
| 07/09/25 | Miami Marlins designated RHP Nick Nastrini for assignment. |
| 07/09/25 | Miami Marlins claimed RHP Tyler Zuber off waivers from New York Mets. |
| 07/06/25 | Miami Marlins sent C Rob Brantly on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 07/06/25 | Miami Marlins sent C Rob Brantly on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 07/01/25 | Miami Marlins activated CF Derek Hill from the 10-day injured list. |
| 07/01/25 | Miami Marlins reassigned RHP Nick Nastrini to the minor leagues. |
| 07/01/25 | Miami Marlins transferred RHP Max Meyer from the 15-day injured list to the 60-day injured list. Left hip impingement. |
| 07/01/25 | Miami Marlins claimed RHP Nick Nastrini off waivers from Chicago White Sox. |
| 07/01/25 | Miami Marlins optioned RHP Nick Nastrini to Jacksonville Jumbo Shrimp. |