Marlins Roster & Staff
Transactions
| Date | Transaction |
| 07/31/09 | Florida Marlins designated SS Andy Gonzalez for assignment. |
| 07/31/09 | Washington Nationals Traded 1B Nick Johnson to Florida Marlins and Jacksonville Suns Traded LHP Aaron Thompson to Nationals Organization. |
| 07/27/09 | Florida Marlins optioned Chris Leroux to Jacksonville Suns. |
| 07/21/09 | Florida Marlins recalled Gaby Sanchez from New Orleans Zephyrs. |
| 07/21/09 | Florida Marlins optioned LHP Andrew Miller to New Orleans Zephyrs. |
| 07/20/09 | Florida Marlins recalled Rick van den Hurk from New Orleans Zephyrs. |
| 07/20/09 | Florida Marlins optioned SS Andy Gonzalez to New Orleans Zephyrs. |
| 07/16/09 | DH Dustin Dickerson assigned to Jamestown Jammers from Florida Marlins. |
| 07/14/09 | Florida Marlins signed Dustin Dickerson. |
| 07/12/09 | Florida Marlins transferred RHP Anibal Sanchez from the 15-day disabled list to the 60-day disabled list. |
| 07/12/09 | Florida Marlins selected the contract of Luis Ayala from New Orleans Zephyrs. |
| 07/12/09 | Florida Marlins optioned Sean West to Jacksonville Suns. |
| 07/09/09 | Florida Marlins optioned Tim Wood to New Orleans Zephyrs. |
| 07/09/09 | LHP Stephen Richards assigned to Jamestown Jammers from Florida Marlins. |
| 07/09/09 | Florida Marlins activated RHP Kiko Calero from the 15-day disabled list. |
| 07/08/09 | Florida Marlins purchased Andy Gonzalez from New Orleans Zephyrs. |
| 07/08/09 | Florida Marlins optioned Alejandro De Aza to New Orleans Zephyrs. |
| 07/08/09 | Florida Marlins transferred CF Alfredo Amezaga from the 15-day disabled list to the 60-day disabled list. |
| 07/08/09 | Chris Wade assigned to GCL Marlins from Florida Marlins. |
| 07/07/09 | Florida Marlins signed Stephen Richards. |
| 07/06/09 | Luis Ayala assigned to New Orleans Zephyrs from Florida Marlins. |
| 07/05/09 | Florida Marlins signed free agent RHP Brendan Donnelly. |
| 07/05/09 | Chris Leroux roster status changed by Florida Marlins. |
| 07/04/09 | Florida Marlins signed SS Chris Wade. |
| 07/04/09 | Florida Marlins sent RHP Kiko Calero on a rehab assignment to Jupiter Hammerheads. |
| 07/03/09 | RHP Joseph O'Gara assigned to Jamestown Jammers from Florida Marlins. |
| 07/03/09 | Jesus Solorzano assigned to DSL Marlins from Florida Marlins. |
| 07/03/09 | Taylor Krick assigned to Jamestown Jammers from Florida Marlins. |
| 07/02/09 | Florida Marlins signed 3B Taylor Krick. |
| 07/02/09 | Florida Marlins signed OF Jesus Solorzano. |
| 07/02/09 | Florida Marlins signed free agent RHP Luis Ayala to a minor league contract. |
| 07/01/09 | Florida Marlins signed Joseph O'Gara. |