Marlins Roster & Staff
Transactions
| Date | Transaction |
| 08/31/20 | Arizona Diamondbacks traded CF Starling Marte to Miami Marlins for Player To Be Named Later, LHP Caleb Smith and RHP Humberto Mejia. |
| 08/31/20 | Arizona Diamondbacks traded CF Starling Marte to Miami Marlins for Player To Be Named Later, LHP Caleb Smith and RHP Humberto Mejia. |
| 08/31/20 | Miami Marlins traded Jonathan Villar to Toronto Blue Jays for Player To Be Named Later. Marlins acquired Griffin Conine to complete trade, 9/18/2020 |
| 08/31/20 | Arizona Diamondbacks traded CF Starling Marte to Miami Marlins for Player To Be Named Later, LHP Caleb Smith and RHP Humberto Mejia. |
| 08/30/20 | Miami Marlins designated RHP Jesus Tinoco for assignment. |
| 08/30/20 | Miami Marlins activated RHP Sandy Alcantara from the 10-day injured list. |
| 08/30/20 | Miami Marlins designated LHP Adam Conley for assignment. |
| 08/30/20 | Miami Marlins activated RHP Sandy Alcantara from the 10-day injured list. |
| 08/30/20 | Miami Marlins activated P Sandy Alcantara from the 10 day injured list. |
| 08/29/20 | Miami Marlins activated C Chad Wallach from the 10-day injured list. |
| 08/29/20 | Alex Vesia roster status changed by Miami Marlins. |
| 08/29/20 | Miami Marlins activated C Chad Wallach from the 10 day injured list. |
| 08/29/20 | Miami Marlins designated Josh D. Smith for assignment. |
| 08/29/20 | Robert Dugger roster status changed by Miami Marlins. |
| 08/29/20 | Miami Marlins designated Brian Navarreto for assignment. |
| 08/29/20 | Miami Marlins designated Brett Eibner for assignment. |
| 08/29/20 | Miami Marlins activated C Chad Wallach from the 10-day injured list. |
| 08/29/20 | Miami Marlins optioned RHP Humberto Mejia to Marlins Alternate Training Site. |
| 08/28/20 | Miami Marlins activated RHP Yimi Garcia from the 10-day injured list. |
| 08/28/20 | Miami Marlins activated P Yimi Garcia from the 10 day injured list. |
| 08/28/20 | Miami Marlins placed 2B Logan Forsythe on the 60-day injured list. Right oblique strain. |
| 08/28/20 | Miami Marlins activated 1B Garrett Cooper from the 10-day injured list. |
| 08/28/20 | Miami Marlins optioned RHP Jorge Guzman to Marlins Alternate Training Site. |
| 08/28/20 | Miami Marlins activated RHP Yimi Garcia from the 10-day injured list. |
| 08/27/20 | RHP Sterling Sharp returned to Washington Nationals from Miami Marlins. |
| 08/27/20 | Miami Marlins released OF Travis Snider. |
| 08/26/20 | Miami Marlins optioned LHP Josh D. Smith to Marlins Alternate Training Site. |
| 08/26/20 | Miami Marlins placed CF Magneuris Sierra on the 10-day injured list retroactive to August 24, 2020. Right hamstring strain. |
| 08/26/20 | Miami Marlins recalled LHP Brandon Leibrandt from Marlins Alternate Training Site. |
| 08/26/20 | Miami Marlins optioned LHP Daniel Castano to Marlins Alternate Training Site. |
| 08/25/20 | Miami Marlins recalled Josh D. Smith from Marlins Alternate Training Site. |
| 08/25/20 | Miami Marlins sent C Ryan Lavarnway outright to Marlins Alternate Training Site. |
| 08/25/20 | Miami Marlins invited non-roster C Ryan Lavarnway to spring training. |
| 08/25/20 | Miami Marlins selected the contract of LHP Trevor Rogers from Marlins Alternate Training Site. |
| 08/24/20 | Miami Marlins optioned SS Eddy Alvarez to Marlins Alternate Training Site. |
| 08/24/20 | Miami Marlins recalled Lewin Diaz from Marlins Alternate Training Site. |
| 08/24/20 | Miami Marlins placed LHP Stephen Tarpley on the 10-day injured list retroactive to August 22, 2020. Right oblique strain. |
| 08/24/20 | Miami Marlins optioned LHP Brandon Leibrandt to Marlins Alternate Training Site. |
| 08/24/20 | Miami Marlins recalled Jorge Guzman from Marlins Alternate Training Site. |
| 08/24/20 | Miami Marlins recalled RHP Jesus Tinoco from Marlins Alternate Training Site. |
| 08/24/20 | Miami Marlins designated RHP Sterling Sharp for assignment. |
| 08/23/20 | Miami Marlins selected the contract of C Brian Navarreto from Marlins Alternate Training Site. |
| 08/23/20 | Miami Marlins placed C Francisco Cervelli on the 7-day injured list. Concussion. |
| 08/23/20 | Miami Marlins optioned RHP Jesus Tinoco to Marlins Alternate Training Site. |
| 08/22/20 | Miami Marlins optioned LHP Josh D. Smith to Marlins Alternate Training Site. |
| 08/22/20 | Miami Marlins transferred LHP Brian Moran from the 10-day injured list to the 60-day injured list. Right knee patellar tendinitis. |
| 08/22/20 | Miami Marlins recalled RHP Sixto Sanchez from Marlins Alternate Training Site. |
| 08/22/20 | Miami Marlins recalled Jesus Tinoco from Marlins Alternate Training Site. |
| 08/22/20 | Miami Marlins transferred SHP Pat Venditte from the 10-day injured list to the 60-day injured list. Right oblique strain. |
| 08/21/20 | Miami Marlins activated C Jorge Alfaro from the 10-day injured list. |
| 08/21/20 | Miami Marlins activated C Jorge Alfaro from the 10-day injured list. |
| 08/21/20 | Miami Marlins designated C Ryan Lavarnway for assignment. |
| 08/21/20 | Miami Marlins placed SS Eddy Alvarez on the paternity list. |
| 08/21/20 | Miami Marlins activated C Jorge Alfaro from the 10 day injured list. |
| 08/21/20 | Miami Marlins activated LHP Richard Bleier from the 10-day injured list. |
| 08/21/20 | Miami Marlins recalled Jesus Sanchez from Marlins Alternate Training Site. |
| 08/20/20 | Miami Marlins activated SS Miguel Rojas from the 10 day injured list. |
| 08/20/20 | Miami Marlins activated SS Miguel Rojas from the 10-day injured list. |
| 08/20/20 | Miami Marlins activated SS Miguel Rojas from the 10-day injured list. |
| 08/20/20 | Miami Marlins placed SHP Pat Venditte on the 10-day injured list retroactive to August 19, 2020. Right oblique strain. |
| 08/20/20 | Miami Marlins optioned CF Monte Harrison to Marlins Alternate Training Site. |
| 08/18/20 | Miami Marlins placed LHP Brian Moran on the 10-day injured list retroactive to August 17, 2020. Right knee patellar tendinitis. |
| 08/18/20 | Miami Marlins selected the contract of RHP Brett Eibner from Marlins Alternate Training Site. |
| 08/18/20 | Miami Marlins activated LF Corey Dickerson from the bereavement list. |
| 08/18/20 | Miami Marlins activated LF Corey Dickerson from the bereavement list. |
| 08/18/20 | Miami Marlins released C Wilkin Castillo. |
| 08/18/20 | Miami Marlins optioned RHP Justin Shafer to Marlins Alternate Training Site. |
| 08/18/20 | Miami Marlins optioned RHP Jordan Yamamoto to Marlins Alternate Training Site. |
| 08/18/20 | Miami Marlins placed RHP Mike Morin on the 60-day injured list retroactive to August 13, 2020. Right elbow UCL injury. |
| 08/18/20 | Miami Marlins recalled Humberto Mejia from Marlins Alternate Training Site. |
| 08/18/20 | Miami Marlins optioned 1B Lewin Diaz to Marlins Alternate Training Site. |
| 08/18/20 | Miami Marlins activated LF Corey Dickerson from the bereavement list. |
| 08/18/20 | Miami Marlins activated OF Corey Dickerson from the bereavement list. |
| 08/18/20 | Miami Marlins selected the contract of Brandon Leibrandt from Marlins Alternate Training Site. |
| 08/15/20 | Miami Marlins placed OF Corey Dickerson on the bereavement list. |
| 08/15/20 | Miami Marlins recalled Lewin Diaz from Marlins Alternate Training Site. |
| 08/14/20 | Colorado Rockies traded RHP Jesus Tinoco to Miami Marlins for RHP Chad Smith. |
| 08/14/20 | Miami Marlins placed RHP Mike Morin on the 10-day injured list retroactive to August 13, 2020. Right elbow UCL injury. |
| 08/14/20 | Colorado Rockies traded RHP Jesus Tinoco to Miami Marlins for RHP Chad Smith. |
| 08/14/20 | Miami Marlins recalled Josh D. Smith from Marlins Alternate Training Site. |
| 08/10/20 | Miami Marlins selected the contract of LHP Brandon Leibrandt from Somerset Patriots. |
| 08/09/20 | Miami Marlins invited non-roster RHP Preston Guilmet to spring training. |
| 08/08/20 | Miami Marlins placed LHP Richard Bleier on the 10-day injured list. Left triceps strain. |
| 08/08/20 | Miami Marlins selected the contract of SHP Pat Venditte from Marlins Alternate Training Site. |
| 08/08/20 | Miami Marlins recalled LHP Brian Moran from Marlins Alternate Training Site. |
| 08/08/20 | Miami Marlins optioned RHP Humberto Mejia to Marlins Alternate Training Site. |
| 08/07/20 | Miami Marlins recalled Humberto Mejia from Marlins Alternate Training Site. |
| 08/07/20 | Miami Marlins optioned RHP Jorge Guzman to Marlins Alternate Training Site. |
| 08/07/20 | Miami Marlins invited non-roster C Wilkin Castillo to spring training. |
| 08/06/20 | Miami Marlins optioned LHP Josh D. Smith to Marlins Alternate Training Site. |
| 08/06/20 | Miami Marlins optioned LHP Brian Moran to Marlins Alternate Training Site. |
| 08/05/20 | Miami Marlins signed free agent SHP Pat Venditte to a minor league contract and invited him to spring training. |
| 08/04/20 | Miami Marlins activated LF Matt Joyce from the 60-day injured list. |
| 08/04/20 | Miami Marlins recalled Josh D. Smith from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins invited non-roster 2B Gosuke Katoh to spring training. |
| 08/04/20 | Miami Marlins invited non-roster C Julian Leon to spring training. |
| 08/04/20 | Miami Marlins invited non-roster RHP Brett Eibner to spring training. |
| 08/04/20 | Miami Marlins invited non-roster 2B Christian Lopes to spring training. |
| 08/04/20 | Brian Moran roster status changed by Miami Marlins. |
| 08/04/20 | Miami Marlins placed RHP Yimi Garcia on the 10-day injured list. |
| 08/04/20 | Miami Marlins placed RHP Jeff Brigham on the 60-day injured list. |
| 08/04/20 | Miami Marlins placed RHP Sandy Alcantara on the 10-day injured list. |
| 08/04/20 | Miami Marlins selected the contract of Daniel Castano from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins placed SS Miguel Rojas on the 10-day injured list. |
| 08/04/20 | Miami Marlins activated CF Lewis Brinson from the 10-day injured list. |
| 08/04/20 | Miami Marlins recalled Justin Shafer from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins placed RHP Nick Neidert on the 10-day injured list. |
| 08/04/20 | Miami Marlins placed RHP Robert Dugger on the 10-day injured list. |
| 08/04/20 | Miami Marlins placed C Chad Wallach on the 10-day injured list. |
| 08/04/20 | Miami Marlins placed RHP Ryne Stanek on the 10-day injured list. |
| 08/04/20 | Miami Marlins invited non-roster RHP Cody Poteet to spring training. |
| 08/04/20 | Miami Marlins selected the contract of SS Eddy Alvarez from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins invited non-roster C Nick Fortes to spring training. |
| 08/04/20 | Miami Marlins selected the contract of RHP Josh A. Smith from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins selected the contract of C Ryan Lavarnway from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins recalled Jordan Yamamoto from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins recalled Jorge Guzman from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins recalled Monte Harrison from Marlins Alternate Training Site. |
| 08/04/20 | Miami Marlins placed 3B Sean Rodriguez on the 60-day injured list. |
| 08/04/20 | Miami Marlins placed LHP Adam Conley on the 10-day injured list. |
| 08/04/20 | Miami Marlins placed LHP Caleb Smith on the 10-day injured list. |
| 08/04/20 | Miami Marlins selected the contract of RHP Nick Vincent from Marlins Alternate Training Site. |
| 08/03/20 | Miami Marlins signed free agent C Wilkin Castillo to a minor league contract. |
| 08/03/20 | Miami Marlins signed free agent RHP Justin Sterner to a minor league contract. |
| 08/02/20 | Miami Marlins claimed LHP Brian Moran off waivers from Toronto Blue Jays. |
| 08/02/20 | Miami Marlins signed free agent 2B Logan Forsythe. |
| 08/02/20 | Miami Marlins placed LHP Alex Vesia on the 10-day injured list. |
| 08/02/20 | Miami Marlins activated RHP James Hoyt. |
| 08/02/20 | Miami Marlins placed RHP Jordan Holloway on the 60-day injured list. |
| 08/01/20 | Baltimore Orioles traded LHP Richard Bleier to Miami Marlins for Player To Be Named Later. |
| 08/01/20 | Miami Marlins selected the contract of RHP Brett Eibner from Sugar Land Skeeters. |
| 08/01/20 | Miami Marlins traded cash to Cleveland Indians for RHP James Hoyt. |