Marlins Roster & Staff
Transactions
| Date | Transaction |
| 08/31/26 | Miami Marlins placed 2B Xavier Edwards on the 10-day injured list. Left thumb sprain. |
| 08/31/26 | Miami Marlins recalled SS Jared Serna from Jacksonville Jumbo Shrimp. |
| 08/31/26 | Miami Marlins optioned RHP Wikelman González to Jacksonville Jumbo Shrimp. |
| 08/31/26 | Miami Marlins recalled LHP Cade Gibson from Jacksonville Jumbo Shrimp. |
| 08/29/26 | Miami Marlins recalled RHP Wikelman González from Jacksonville Jumbo Shrimp. |
| 08/29/26 | Miami Marlins optioned LHP Patrick Monteverde to Jacksonville Jumbo Shrimp. |
| 08/26/26 | Miami Marlins released LHP John King. |
| 08/26/26 | Miami Marlins optioned LHP Cade Gibson to Jacksonville Jumbo Shrimp. |
| 08/26/26 | Miami Marlins selected the contract of LHP Patrick Monteverde from Jacksonville Jumbo Shrimp. |
| 08/25/26 | Miami Marlins placed RHP Pete Fairbanks on the 15-day injured list. Right median nerve irritation. |
| 08/25/26 | Miami Marlins recalled LHP Dax Fulton from Jacksonville Jumbo Shrimp. |
| 08/24/26 | Miami Marlins activated 1B Kyle Stowers from the 10-day injured list. |
| 08/24/26 | Miami Marlins optioned 3B Deyvison De Los Santos to Jacksonville Jumbo Shrimp. |
| 08/23/26 | Miami Marlins designated LHP John King for assignment. |
| 08/23/26 | Miami Marlins recalled RHP Jack Ralston from Jacksonville Jumbo Shrimp. |
| 08/22/26 | Miami Marlins optioned C Logan Driscoll to Jacksonville Jumbo Shrimp. |
| 08/22/26 | Miami Marlins recalled 3B Deyvison De Los Santos from Jacksonville Jumbo Shrimp. |
| 08/21/26 | Miami Marlins transferred RHP William Kempner from the 15-day injured list to the 60-day injured list. Right elbow sprain. |
| 08/21/26 | Miami Marlins optioned 3B Graham Pauley to Jacksonville Jumbo Shrimp. |
| 08/21/26 | Miami Marlins selected the contract of C Logan Driscoll from Jacksonville Jumbo Shrimp. |
| 08/20/26 | Tampa Bay Rays traded C Logan Driscoll to Miami Marlins for cash. |
| 08/18/26 | Miami Marlins sent RHP Anthony Bender on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 08/11/26 | Miami Marlins placed 1B Kyle Stowers on the 10-day injured list retroactive to August 10, 2026. Left hamstring strain. |
| 08/11/26 | Miami Marlins recalled 3B Graham Pauley from Jacksonville Jumbo Shrimp. |
| 08/10/26 | Miami Marlins signed free agent RHP Colby Guy to a minor league contract. |
| 08/10/26 | Miami Marlins optioned RHP Wikelman González to Jacksonville Jumbo Shrimp. |
| 08/10/26 | Miami Marlins claimed RHP Wikelman González off waivers from Chicago White Sox. |
| 08/05/26 | Miami Marlins traded 1B Jacob Berry to Kansas City Royals. |
| 08/04/26 | Miami Marlins activated RHP Victor Vodnik. |
| 08/04/26 | Miami Marlins recalled C Agustín Ramírez from Jacksonville Jumbo Shrimp. |
| 08/03/26 | Miami Marlins activated RHP Josh Ekness from the 60-day injured list. |
| 08/03/26 | Colorado Rockies traded RHP Victor Vodnik to Miami Marlins for 1B Connor Norby and RHP Aiden May. |
| 08/03/26 | Colorado Rockies traded RHP Victor Vodnik to Miami Marlins for 1B Connor Norby and RHP Aiden May. |
| 08/03/26 | Colorado Rockies traded RHP Victor Vodnik to Miami Marlins for 1B Connor Norby and RHP Aiden May. |
| 08/03/26 | Miami Marlins traded RHP Lake Bachar to Pittsburgh Pirates for RHP Brandan Bidois, LF Brian Sanchez and IF Hyun Seung Lee. |
| 08/03/26 | Miami Marlins selected the contract of RHP Jack Ralston from Jacksonville Jumbo Shrimp. |
| 08/03/26 | Miami Marlins traded C Liam Hicks to Tampa Bay Rays for 3B Brayden Taylor, SS Adrian Santana and RHP Jacob Kisting. |
| 08/03/26 | Miami Marlins traded C Liam Hicks to Tampa Bay Rays for 3B Brayden Taylor, SS Adrian Santana and RHP Jacob Kisting. |
| 08/03/26 | Miami Marlins traded LHP Braxton Garrett to Chicago Cubs for 3B Jonathon Long and RHP Jace Beck. |
| 08/03/26 | Miami Marlins traded LHP Braxton Garrett to Chicago Cubs for 3B Jonathon Long and RHP Jace Beck. |
| 08/03/26 | Miami Marlins traded RF Rece Hinds to Baltimore Orioles for cash. |
| 08/03/26 | Miami Marlins traded C Liam Hicks to Tampa Bay Rays for 3B Brayden Taylor, SS Adrian Santana and RHP Jacob Kisting. |
| 08/03/26 | Miami Marlins traded C Liam Hicks to Tampa Bay Rays for 3B Brayden Taylor, SS Adrian Santana and RHP Jacob Kisting. |
| 08/03/26 | Miami Marlins optioned LHP Dax Fulton to Jacksonville Jumbo Shrimp. |
| 08/03/26 | Miami Marlins traded LHP Braxton Garrett to Chicago Cubs for 3B Jonathon Long and RHP Jace Beck. |
| 08/03/26 | Miami Marlins traded RHP Lake Bachar to Pittsburgh Pirates for RHP Brandan Bidois, LF Brian Sanchez and IF Hyun Seung Lee. |
| 08/03/26 | Miami Marlins optioned RHP Jack Ralston to Jacksonville Jumbo Shrimp. |
| 08/03/26 | Miami Marlins traded RHP Lake Bachar to Pittsburgh Pirates for RHP Brandan Bidois, LF Brian Sanchez and IF Hyun Seung Lee. |
| 08/03/26 | Miami Marlins traded RHP Lake Bachar to Pittsburgh Pirates for RHP Brandan Bidois, LF Brian Sanchez and IF Hyun Seung Lee. |
| 08/01/26 | Miami Marlins activated RF Owen Caissie from the 10-day injured list. |
| 08/01/26 | Miami Marlins optioned 3B Graham Pauley to Jacksonville Jumbo Shrimp. |