Marlins Roster & Staff
Transactions
| Date | Transaction |
| 06/27/17 | Miami Marlins signed free agent RHP Keyvius Sampson to a minor league contract. |
| 06/27/17 | Miami Marlins sent 2B Christian Colon outright to New Orleans Baby Cakes. |
| 06/27/17 | Miami Marlins signed RHP Josh Roberson. |
| 06/26/17 | Miami Marlins traded SS Adeiny Hechavarria to Tampa Bay Rays for CF Braxton Lee and RHP Ethan Clark. |
| 06/26/17 | Miami Marlins traded SS Adeiny Hechavarria to Tampa Bay Rays for CF Braxton Lee and RHP Ethan Clark. |
| 06/26/17 | Miami Marlins traded SS Adeiny Hechavarria to Tampa Bay Rays for CF Braxton Lee and RHP Ethan Clark. |
| 06/23/17 | Miami Marlins signed RHP Montana Parsons. |
| 06/23/17 | Miami Marlins activated 3B Martin Prado from the 10-day disabled list. |
| 06/23/17 | Miami Marlins designated 2B Christian Colon for assignment. |
| 06/23/17 | Miami Marlins signed 3B Joe Dunand. |
| 06/23/17 | Miami Marlins signed 1B Ben Fisher. |
| 06/23/17 | Miami Marlins signed LHP Trevor Rogers. |
| 06/23/17 | Miami Marlins signed OF Brian Miller. |
| 06/23/17 | Miami Marlins signed free agent C Michael Hernandez to a minor league contract. |
| 06/23/17 | Miami Marlins signed SS Micah Brown. |
| 06/23/17 | Miami Marlins signed LHP Doug Domnarski. |
| 06/23/17 | Miami Marlins signed RHP Gavin Fritz. |
| 06/23/17 | Miami Marlins signed SS Demetrius Sims. |
| 06/23/17 | Miami Marlins signed 3B Denis Karas. |
| 06/23/17 | Miami Marlins signed LHP Dylan Cyphert. |
| 06/23/17 | Miami Marlins signed OF Cameron Baranek. |
| 06/23/17 | Miami Marlins signed C Jared Barnes. |
| 06/23/17 | Miami Marlins signed LHP Sean Guenther. |
| 06/23/17 | Miami Marlins signed RHP Ryan Lillie. |
| 06/23/17 | Miami Marlins signed 2B Riley Mahan. |
| 06/23/17 | Miami Marlins signed RHP Bryce Howe. |
| 06/23/17 | Miami Marlins signed 3B Tyler Curtis. |
| 06/23/17 | Miami Marlins signed RHP Evan Estes. |
| 06/23/17 | Miami Marlins signed RHP Brady Puckett. |
| 06/23/17 | Miami Marlins signed RHP Vincenzo Aiello. |
| 06/23/17 | Miami Marlins signed RHP Henry McAree. |
| 06/23/17 | Miami Marlins signed OF Michael Donadio. |
| 06/23/17 | Miami Marlins signed OF Harrison White. |
| 06/23/17 | Miami Marlins signed LHP Kyle Farjad. |
| 06/23/17 | Miami Marlins signed LHP Karl Craigie. |
| 06/23/17 | Miami Marlins signed RHP Josh Alberius. |
| 06/23/17 | Miami Marlins signed RHP Brandon Boone. |
| 06/22/17 | Miami Marlins placed RHP Brad Ziegler on the 10-day disabled list retroactive to June 21, 2017. Back strain. |
| 06/22/17 | Miami Marlins activated RHP Junichi Tazawa from the 10-day disabled list. |
| 06/20/17 | Miami Marlins sent RHP Junichi Tazawa on a rehab assignment to New Orleans Baby Cakes. |
| 06/19/17 | Justin Nicolino roster status changed by Miami Marlins. |
| 06/19/17 | Miami Marlins sent SS Adeiny Hechavarria on a rehab assignment to Jupiter Hammerheads. |
| 06/19/17 | Miami Marlins optioned RHP Drew Steckenrider to New Orleans Baby Cakes. |
| 06/19/17 | Miami Marlins sent 3B Martin Prado on a rehab assignment to Jupiter Hammerheads. |
| 06/16/17 | Miami Marlins sent SS Adeiny Hechavarria on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 06/16/17 | Miami Marlins sent 3B Martin Prado on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 06/16/17 | Miami Marlins activated 1B Justin Bour from the 10-day disabled list. |
| 06/15/17 | Miami Marlins optioned C Tomas Telis to New Orleans Baby Cakes. |
| 06/15/17 | Miami Marlins sent 3B Martin Prado on a rehab assignment to Jupiter Hammerheads. |
| 06/14/17 | Miami Marlins optioned RHP Tom Koehler to New Orleans Baby Cakes. |
| 06/14/17 | Miami Marlins sent 1B Justin Bour on a rehab assignment to Jupiter Hammerheads. |
| 06/13/17 | Miami Marlins sent RHP Junichi Tazawa on a rehab assignment to Jacksonville Jumbo Shrimp. |
| 06/13/17 | Miami Marlins sent RHP Tom Koehler on a rehab assignment to New Orleans Baby Cakes. |
| 06/13/17 | Miami Marlins sent LHP Justin Nicolino on a rehab assignment to Jupiter Hammerheads. |
| 06/10/17 | Miami Marlins recalled Drew Steckenrider from New Orleans Baby Cakes. |
| 06/10/17 | Miami Marlins optioned RHP Brian Ellington to New Orleans Baby Cakes. |
| 06/09/17 | Miami Marlins sent RHP Junichi Tazawa on a rehab assignment to Jupiter Hammerheads. |
| 06/08/17 | Miami Marlins sent RHP Tom Koehler on a rehab assignment to Jupiter Hammerheads. |
| 06/06/17 | Miami Marlins recalled Tomas Telis from New Orleans Baby Cakes. |
| 06/06/17 | Miami Marlins placed 1B Justin Bour on the 10-day disabled list retroactive to June 5, 2017. Left ankle contusion. |
| 06/05/17 | Miami Marlins signed free agent RHP William Cuevas to a minor league contract. |
| 06/01/17 | Miami Marlins signed RHP James Needy. |
| 06/01/17 | Miami Marlins activated LHP Jeff Locke from the 10-day disabled list. |
| 06/01/17 | Miami Marlins placed LHP Justin Nicolino on the 10-day disabled list retroactive to May 31, 2017. Left index finger contusion. |