Nationals Roster & Staff
Transactions
| Date | Transaction |
| 02/24/10 | Washington Nationals signed free agent RHP Livan Hernandez to a minor league contract and invited him to spring training. |
| 02/19/10 | Jordan Zimmermann roster status changed by Washington Nationals. |
| 02/19/10 | Washington Nationals signed free agent RHP Chien-Ming Wang. |
| 02/18/10 | Washington Nationals sent Doug Slaten outright to Syracuse Chiefs. |
| 02/18/10 | Washington Nationals invited non-roster LHP Doug Slaten to spring training. |
| 02/17/10 | Washington Nationals signed free agent LHP Ron Villone to a minor league contract and invited him to spring training. |
| 02/15/10 | Washington Nationals signed free agent CF Willy Taveras to a minor league contract and invited him to spring training. |
| 02/14/10 | Washington Nationals designated Doug Slaten for assignment. |
| 02/12/10 | Washington Nationals signed free agent 2B Adam Kennedy. |
| 02/03/10 | Milwaukee Brewers claimed Marco Estrada off waivers from Washington Nationals. |