Marlins Roster & Staff
Transactions
| Date | Transaction |
| 03/31/13 | Miami Marlins selected the contract of RHP Kevin Slowey from New Orleans Zephyrs. |
| 03/31/13 | Jose Ceda roster status changed by Miami Marlins. |
| 03/31/13 | Alfredo Silverio roster status changed by Miami Marlins. |
| 03/31/13 | Miami Marlins placed RHP Nathan Eovaldi on the 15-day disabled list retroactive to March 24, 2013. Mild right shoulder inflammation. |
| 03/31/13 | Miami Marlins designated Gorkys Hernandez for assignment. |
| 03/31/13 | Miami Marlins designated Scott Maine for assignment. |
| 03/31/13 | Miami Marlins recalled RHP Alex Sanabia from New Orleans Zephyrs. |
| 03/31/13 | Miami Marlins selected the contract of RHP Jose Fernandez from Jupiter Hammerheads. |
| 03/31/13 | Miami Marlins selected the contract of RF Austin Kearns from New Orleans Zephyrs. |
| 03/31/13 | Miami Marlins selected the contract of 1B Casey Kotchman from New Orleans Zephyrs. |
| 03/31/13 | Miami Marlins selected the contract of RHP John Maine from New Orleans Zephyrs. |
| 03/31/13 | Miami Marlins placed C Jeff Mathis on the 15-day disabled list retroactive to March 22, 2013. Fractured right clavicle. |
| 03/31/13 | Miami Marlins selected the contract of RHP Chad Qualls from New Orleans Zephyrs. |
| 03/31/13 | Miami Marlins designated Evan Reed for assignment. |
| 03/31/13 | Miami Marlins designated Zack Cox for assignment. |
| 03/31/13 | Miami Marlins placed 1B Joe Mahoney on the 15-day disabled list retroactive to March 22, 2013. Intercostal strain. |
| 03/31/13 | Miami Marlins placed 1B Logan Morrison on the 60-day disabled list. Recovering from September 2012 right knee surgery. |
| 03/31/13 | Miami Marlins placed RHP Henderson Alvarez on the 15-day disabled list retroactive to March 27, 2013. Mild right shoulder inflammation. |
| 03/31/13 | Miami Marlins selected the contract of 3B Chris Valaika from New Orleans Zephyrs. |
| 03/29/13 | Miami Marlins signed free agent C Miguel Olivo. |
| 03/29/13 | Miami Marlins optioned Kyle Skipworth to New Orleans Zephyrs. |
| 03/28/13 | 2B Noah Perio assigned to Miami Marlins. |
| 03/28/13 | OF Michael Main assigned to Miami Marlins. |
| 03/27/13 | RHP James Nygren assigned to Miami Marlins. |
| 03/27/13 | C Sharif Othman assigned to Miami Marlins. |
| 03/27/13 | Henderson Alvarez roster status changed by Miami Marlins. |
| 03/27/13 | RF Ryan McIntyre assigned to Miami Marlins. |
| 03/27/13 | 2B Blake Barber assigned to Miami Marlins. |
| 03/27/13 | SS Cameron Flynn assigned to Miami Marlins. |
| 03/27/13 | 1B Mark Canha assigned to Miami Marlins. |
| 03/27/13 | RHP Justin Jackson assigned to Miami Marlins. |
| 03/27/13 | LHP James Leverton assigned to Miami Marlins. |
| 03/26/13 | Miami Marlins optioned Dan Jennings to New Orleans Zephyrs. |
| 03/26/13 | Miami Marlins signed free agent LF Matt Diaz to a minor league contract. |
| 03/26/13 | Miami Marlins optioned Jacob Turner to New Orleans Zephyrs. |
| 03/26/13 | RHP Nick Wittgren assigned to Miami Marlins. |
| 03/26/13 | RHP Sean Donatello assigned to Miami Marlins. |
| 03/26/13 | OF Cody Keefer assigned to Miami Marlins. |
| 03/26/13 | 2B Anthony Gomez assigned to Miami Marlins. |
| 03/26/13 | LF Jake Smolinski assigned to Miami Marlins. |
| 03/23/13 | Miami Marlins signed free agent SS Wilson Valdez to a minor league contract and invited him to spring training. |
| 03/23/13 | SS Austin Nola assigned to Miami Marlins. |
| 03/23/13 | C Taylor Krick assigned to Miami Marlins. |
| 03/23/13 | RF James Wooster assigned to Miami Marlins. |
| 03/23/13 | RHP Mike Ojala assigned to Miami Marlins. |
| 03/23/13 | RHP Rett Varner assigned to Miami Marlins. |
| 03/23/13 | CF Juancito Martinez assigned to Miami Marlins. |
| 03/22/13 | IF Paul Gran assigned to Miami Marlins. |
| 03/22/13 | Miami Marlins optioned Tom Koehler to New Orleans Zephyrs. |
| 03/20/13 | Miami Marlins released 3B Chone Figgins. |
| 03/19/13 | Miami Marlins signed free agent C Koyie Hill to a minor league contract. |
| 03/18/13 | OF Daniel Pertusati assigned to Miami Marlins. |
| 03/18/13 | RHP Scott McGough assigned to Miami Marlins. |
| 03/18/13 | RHP Tyler Higgins assigned to Miami Marlins. |
| 03/17/13 | LHP Braulio Lara returned to Tampa Bay Rays from Miami Marlins. |
| 03/13/13 | Miami Marlins optioned Chris Hatcher to New Orleans Zephyrs. |
| 03/11/13 | Miami Marlins optioned Evan Reed to New Orleans Zephyrs. |
| 03/11/13 | Miami Marlins optioned RF Marcell Ozuna to Jacksonville Suns. |
| 03/11/13 | Miami Marlins optioned RHP Sam Dyson to Jacksonville Suns. |
| 03/11/13 | Miami Marlins optioned Brad Hand to New Orleans Zephyrs. |
| 03/11/13 | Miami Marlins optioned Kyle Jensen to New Orleans Zephyrs. |
| 03/11/13 | Miami Marlins optioned Edgar Olmos to Jacksonville Suns. |
| 03/11/13 | Miami Marlins optioned Alex Sanabia to New Orleans Zephyrs. |
| 03/09/13 | IF Terrence Dayleg assigned to Miami Marlins. |
| 03/09/13 | LF Isaac Galloway assigned to Miami Marlins. |
| 03/08/13 | Miami Marlins optioned Arquimedes Caminero to Jacksonville Suns. |
| 03/08/13 | Miami Marlins optioned Scott Maine to New Orleans Zephyrs. |
| 03/08/13 | Miami Marlins released RHP Michael Wuertz. |
| 03/08/13 | Miami Marlins optioned Zack Cox to Jacksonville Suns. |
| 03/06/13 | 2B Austin Barnes assigned to Miami Marlins. |