Marlins Roster & Staff
Transactions
| Date | Transaction |
| 07/31/19 | Miami Marlins traded RHP Zac Gallen to Arizona Diamondbacks. |
| 07/31/19 | Miami Marlins optioned RF Jesus Sanchez to New Orleans Baby Cakes. |
| 07/31/19 | 2B Jazz Chisholm Jr. roster status changed by Miami Marlins. |
| 07/31/19 | Miami Marlins traded RHP Nick Anderson and RHP Trevor Richards to Tampa Bay Rays for RF Jesus Sanchez and RHP Ryne Stanek. |
| 07/31/19 | Miami Marlins traded RHP Nick Anderson and RHP Trevor Richards to Tampa Bay Rays for RF Jesus Sanchez and RHP Ryne Stanek. |
| 07/31/19 | Miami Marlins traded RHP Nick Anderson and RHP Trevor Richards to Tampa Bay Rays for RF Jesus Sanchez and RHP Ryne Stanek. |
| 07/31/19 | Miami Marlins recalled Tyler Kinley from New Orleans Baby Cakes. |
| 07/31/19 | Miami Marlins traded RHP Nick Anderson and RHP Trevor Richards to Tampa Bay Rays for RF Jesus Sanchez and RHP Ryne Stanek. |
| 07/31/19 | Miami Marlins activated 3B Jon Berti from the 10-day injured list. |
| 07/31/19 | Arizona Diamondbacks traded SS Jazz Chisholm to Miami Marlins. |
| 07/29/19 | Miami Marlins signed free agent RHP Luis Vizcaino to a minor league contract. |
| 07/28/19 | Miami Marlins recalled RHP Jeff Brigham from New Orleans Baby Cakes. |
| 07/28/19 | Miami Marlins sent RHP Pablo Lopez on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 07/28/19 | Miami Marlins signed free agent LHP Jordan Guerrero to a minor league contract. |
| 07/28/19 | Miami Marlins sent RHP Pablo Lopez on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 07/27/19 | Miami Marlins traded RHP Sergio Romo, RHP Chris Vallimont and Player To Be Named Later to Minnesota Twins for 1B Lewin Diaz. |
| 07/27/19 | Miami Marlins traded RHP Sergio Romo, RHP Chris Vallimont and Player To Be Named Later to Minnesota Twins for 1B Lewin Diaz. |
| 07/27/19 | Miami Marlins traded RHP Sergio Romo, RHP Chris Vallimont and Player To Be Named Later to Minnesota Twins for 1B Lewin Diaz. |
| 07/22/19 | Miami Marlins signed free agent RHP Brian McKenna to a minor league contract. |
| 07/21/19 | Miami Marlins sent 3B Jon Berti on a rehab assignment to New Orleans Baby Cakes. |
| 07/21/19 | Miami Marlins signed free agent RHP Wander De La Rosa to a minor league contract. |
| 07/18/19 | Miami Marlins placed SS JT Riddle on the 10-day injured list. Right forearm strain. |
| 07/18/19 | Miami Marlins activated 1B Martin Prado from the 10-day injured list. |
| 07/16/19 | Miami Marlins placed RHP Austin Brice on the 10-day injured list retroactive to July 14, 2019. Right forearm flexor strain. |
| 07/16/19 | Miami Marlins activated RHP Tayron Guerrero from the 10-day injured list. |
| 07/14/19 | Miami Marlins sent 3B Martin Prado on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 07/12/19 | Miami Marlins signed OF Kameron Misner. |
| 07/12/19 | Miami Marlins signed RHP Chris Mokma. |
| 07/12/19 | Miami Marlins signed OF J.J. Bleday. |
| 07/11/19 | Miami Marlins sent C Chad Wallach on a rehab assignment to New Orleans Baby Cakes. |
| 07/10/19 | Miami Marlins sent 1B Martin Prado on a rehab assignment to Jupiter Hammerheads. |
| 07/09/19 | Miami Marlins sent RHP Tayron Guerrero on a rehab assignment to Jupiter Hammerheads. |
| 07/06/19 | Miami Marlins sent C Chad Wallach on a rehab assignment to Jupiter Hammerheads. |
| 07/06/19 | Miami Marlins optioned RHP Jeff Brigham to New Orleans Baby Cakes. |
| 07/06/19 | Miami Marlins activated LHP Caleb Smith from the 10-day injured list. |
| 07/05/19 | Miami Marlins signed 1B Julian Infante. |
| 07/05/19 | Miami Marlins signed RHP Bryan Hoeing. |
| 07/05/19 | Miami Marlins signed LHP Zach King. |
| 07/02/19 | Miami Marlins signed free agent SS Jose Salas to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent RHP Eury Perez to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent RHP Cristian Millan to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent OF Renny Hidalgo to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent RHP Jose Bazan to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent OF Germain Ruiz to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent SS Junior Sanchez to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent SS Javier Sanoja to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent RHP Jean Reyes to a minor league contract. |
| 07/02/19 | Miami Marlins signed free agent SS Ian Lewis to a minor league contract. |
| 07/02/19 | Miami Marlins signed C Dustin Skelton. |
| 07/02/19 | Miami Marlins signed free agent SS Miguel Rodriguez to a minor league contract. |
| 07/01/19 | Miami Marlins signed free agent OF Ricardo Roman to a minor league contract. |