Nationals Roster & Staff
Transactions
| Date | Transaction |
| 08/29/15 | Washington Nationals sent 2B Dan Uggla on a rehab assignment to Hagerstown Suns. |
| 08/28/15 | Washington Nationals recalled Matt den Dekker from Syracuse Chiefs. |
| 08/28/15 | Washington Nationals placed CF Denard Span on the 15-day disabled list retroactive to August 27, 2015. Left hip inflammation |
| 08/28/15 | Washington Nationals sent OF Tyler Moore on a rehab assignment to Syracuse Chiefs. |
| 08/25/15 | Washington Nationals activated CF Denard Span from the 15-day disabled list. |
| 08/25/15 | Washington Nationals sent 2B Dan Uggla on a rehab assignment to Potomac Nationals. |
| 08/25/15 | Washington Nationals optioned RHP Tanner Roark to Potomac Nationals. |
| 08/25/15 | Washington Nationals sent 1B Tyler Moore on a rehab assignment to Potomac Nationals. |
| 08/22/15 | Washington Nationals signed free agent 3B Scott Sizemore to a minor league contract. |
| 08/21/15 | Washington Nationals transferred RHP Aaron Barrett from the 15-day disabled list to the 60-day disabled list. Right elbow sprain |
| 08/21/15 | Washington Nationals selected the contract of Trea Turner from Syracuse Chiefs. |
| 08/21/15 | Washington Nationals placed 1B Tyler Moore on the 15-day disabled list retroactive to August 19, 2015. Left ankle sprain |
| 08/21/15 | Washington Nationals sent 2B Dan Uggla on a rehab assignment to Harrisburg Senators. |
| 08/21/15 | Washington Nationals sent CF Denard Span on a rehab assignment to Harrisburg Senators. |
| 08/21/15 | Washington Nationals sent RHP David Carpenter on a rehab assignment to Harrisburg Senators. |
| 08/19/15 | Washington Nationals sent RHP David Carpenter on a rehab assignment to Potomac Nationals. |
| 08/18/15 | Washington Nationals sent OF Denard Span on a rehab assignment to Hagerstown Suns. |
| 08/18/15 | Washington Nationals sent 2B Dan Uggla on a rehab assignment to Hagerstown Suns. |
| 08/16/15 | Washington Nationals sent CF Denard Span on a rehab assignment to Potomac Nationals. |
| 08/14/15 | Washington Nationals signed free agent OF Brenden Webb to a minor league contract. |
| 08/13/15 | Washington Nationals sent LF Reed Johnson on a rehab assignment to Potomac Nationals. |
| 08/11/15 | Washington Nationals signed free agent RHP Juan Gutierrez to a minor league contract. |
| 08/10/15 | Washington Nationals signed free agent CF Tony Campana to a minor league contract. |
| 08/08/15 | Washington Nationals placed 2B Dan Uggla on the 15-day disabled list. Back spasms. |
| 08/08/15 | Washington Nationals activated RHP Stephen Strasburg from the 15-day disabled list. |
| 08/06/15 | Washington Nationals placed RHP Aaron Barrett on the 15-day disabled list. Right elbow sprain |
| 08/06/15 | Washington Nationals recalled RHP Blake Treinen from Syracuse Chiefs. |