Nationals Roster & Staff
Transactions
| Date | Transaction |
| 05/29/11 | Washington Nationals recalled Yunesky Maya from Syracuse Chiefs. |
| 05/29/11 | Washington Nationals optioned Collin Balester to Syracuse Chiefs. |
| 05/28/11 | Washington Nationals recalled Collin Balester from Syracuse Chiefs. |
| 05/28/11 | Ivan Pineyro assigned to DSL Nationals from Washington Nationals. |
| 05/28/11 | Washington Nationals placed LHP Tom Gorzelanny on the 15-day disabled list retroactive to May 24, 2011. Left elbow inflammation. |
| 05/27/11 | Washington Nationals purchased RHP Ivan Pineyro. |
| 05/27/11 | Washington Nationals signed free agent RHP Ivan Pineyro to a minor league contract. |
| 05/24/11 | Washington Nationals activated CF Rick Ankiel from the 15-day disabled list. |
| 05/23/11 | Brian Broderick returned to St. Louis Cardinals from Washington Nationals. |
| 05/23/11 | Washington Nationals placed 1B Adam LaRoche on the 15-day disabled list retroactive to May 22, 2011. torn labrum in left shoulder |
| 05/17/11 | Hector Nelo assigned to Potomac Nationals from Washington Nationals. |
| 05/16/11 | RHP Hector Nelo assigned to Washington Nationals. |
| 05/14/11 | Washington Nationals recalled RHP Cole Kimball from Syracuse Chiefs. |
| 05/14/11 | Washington Nationals designated Brian Broderick for assignment. |
| 05/07/11 | Washington Nationals recalled Roger Bernadina from Syracuse Chiefs. |
| 05/07/11 | Washington Nationals placed CF Rick Ankiel on the 15-day disabled list retroactive to May 3, 2011. Right wrist sprain. |