Nationals Roster & Staff
Transactions
| Date | Transaction |
| 07/30/25 | Washington Nationals optioned LHP Jake Eder to Rochester Red Wings. |
| 07/30/25 | Washington Nationals traded LHP Andrew Chafin and RHP Luis García to Los Angeles Angels for LHP Jake Eder and 1B Sam Brown. |
| 07/30/25 | Washington Nationals recalled RHP Zach Brzykcy from Rochester Red Wings. |
| 07/30/25 | Washington Nationals traded LHP Andrew Chafin and RHP Luis García to Los Angeles Angels for LHP Jake Eder and 1B Sam Brown. |
| 07/30/25 | Washington Nationals traded LHP Andrew Chafin and RHP Luis García to Los Angeles Angels for LHP Jake Eder and 1B Sam Brown. |
| 07/30/25 | Washington Nationals traded LHP Andrew Chafin and RHP Luis García to Los Angeles Angels for LHP Jake Eder and 1B Sam Brown. |
| 07/29/25 | Washington Nationals sent RF Dylan Crews on a rehab assignment to Rochester Red Wings. |
| 07/27/25 | Washington Nationals recalled 3B José Tena from Rochester Red Wings. |
| 07/27/25 | Washington Nationals optioned RHP Clayton Beeter to Rochester Red Wings. |
| 07/26/25 | Washington Nationals traded 3B Amed Rosario to New York Yankees for RHP Clayton Beeter and CF Browm Martinez. |
| 07/26/25 | Washington Nationals traded 3B Amed Rosario to New York Yankees for RHP Clayton Beeter and CF Browm Martinez. |
| 07/26/25 | Washington Nationals traded 3B Amed Rosario to New York Yankees for RHP Clayton Beeter and CF Browm Martinez. |
| 07/25/25 | 3B Amed Rosario roster status changed by Washington Nationals. |
| 07/25/25 | Washington Nationals signed OF Ethan Petry. |
| 07/24/25 | Washington Nationals signed RHP Landon Harmon. |
| 07/24/25 | Washington Nationals signed SS Coy James. |
| 07/24/25 | Washington Nationals optioned RHP Orlando Ribalta to Rochester Red Wings. |
| 07/23/25 | Washington Nationals signed 1B Juan Cruz. |
| 07/23/25 | Washington Nationals activated RHP Orlando Ribalta from the 15-day injured list. |
| 07/22/25 | Washington Nationals signed RHP Miguel Sime Jr.. |
| 07/22/25 | Washington Nationals transferred RF Dylan Crews from the 10-day injured list to the 60-day injured list. Left oblique strain. |
| 07/22/25 | Washington Nationals optioned RHP Mason Thompson to Rochester Red Wings. |
| 07/22/25 | Washington Nationals selected the contract of LHP Konnor Pilkington from Rochester Red Wings. |
| 07/21/25 | Washington Nationals signed LHP Ben Moore. |
| 07/21/25 | Washington Nationals signed LHP Levi Huesman. |
| 07/21/25 | Washington Nationals signed C NIck Hollifield. |
| 07/21/25 | Washington Nationals signed RHP Tucker Biven. |
| 07/21/25 | Washington Nationals signed free agent OF Jordan Williams to a minor league contract. |
| 07/21/25 | Washington Nationals signed 1B Jacob Walsh. |
| 07/21/25 | Washington Nationals signed OF Jack Moroknek. |
| 07/21/25 | Washington Nationals signed RHP Owen Puk. |
| 07/19/25 | Washington Nationals signed SS Eli Willits. |
| 07/18/25 | Washington Nationals sent RHP Orlando Ribalta on a rehab assignment to Rochester Red Wings. |
| 07/15/25 | Washington Nationals signed RHP Riley Maddox. |
| 07/15/25 | Washington Nationals signed C Boston Smith. |
| 07/15/25 | Washington Nationals signed RHP Julian Tonghini. |
| 07/15/25 | Washington Nationals signed 3B Wyatt Henseler. |
| 07/15/25 | Washington Nationals signed 1B Hunter Hines. |
| 07/13/25 | Washington Nationals optioned LHP Shinnosuke Ogasawara to Rochester Red Wings. |
| 07/13/25 | Washington Nationals recalled RHP Andry Lara from Harrisburg Senators. |
| 07/08/25 | Washington Nationals placed C Keibert Ruiz on the 7-day injured list retroactive to July 6, 2025. |
| 07/08/25 | Washington Nationals signed free agent RHP Luis García. |
| 07/08/25 | Washington Nationals transferred RHP Trevor Williams from the 15-day injured list to the 60-day injured list. Right elbow sprain. |
| 07/08/25 | Washington Nationals sent RHP Orlando Ribalta on a rehab assignment to Harrisburg Senators. |
| 07/08/25 | Washington Nationals sent RHP Orlando Ribalta on a rehab assignment to Harrisburg Senators. |
| 07/08/25 | Washington Nationals optioned RHP Eduardo Salazar to Rochester Red Wings. |
| 07/08/25 | Washington Nationals recalled C Drew Millas from Rochester Red Wings. |
| 07/06/25 | Washington Nationals optioned RHP Ryan Loutos to Rochester Red Wings. |
| 07/06/25 | Washington Nationals recalled LHP Shinnosuke Ogasawara from Rochester Red Wings. |
| 07/05/25 | Washington Nationals placed RHP Derek Law on the 60-day injured list. Right forearm Inflammation. |
| 07/05/25 | Washington Nationals signed free agent RHP Ranger Sarit to a minor league contract. |
| 07/05/25 | Washington Nationals activated RHP Mason Thompson from the 60-day injured list. |
| 07/05/25 | Washington Nationals optioned RHP Zach Brzykcy to Rochester Red Wings. |
| 07/04/25 | Washington Nationals activated C Keibert Ruiz from the 10-day injured list. |
| 07/04/25 | Washington Nationals placed RHP Trevor Williams on the 15-day injured list. Right elbow sprain. |
| 07/04/25 | Washington Nationals optioned C Drew Millas to Rochester Red Wings. |
| 07/04/25 | Washington Nationals recalled RHP Ryan Loutos from Rochester Red Wings. |
| 07/03/25 | Washington Nationals signed free agent C Francisco Mejía to a minor league contract. |
| 07/03/25 | Washington Nationals activated LHP Andrew Chafin from the 15-day injured list. |
| 07/03/25 | Washington Nationals optioned RHP Ryan Loutos to Rochester Red Wings. |
| 07/03/25 | Washington Nationals optioned RHP Andry Lara to Harrisburg Senators. |
| 07/02/25 | Washington Nationals sent RHP Mason Thompson on a rehab assignment to Rochester Red Wings. |
| 07/02/25 | Washington Nationals recalled RHP Andry Lara from Harrisburg Senators. |
| 07/01/25 | Washington Nationals activated 3B Paul DeJong from the 10-day injured list. |
| 07/01/25 | Washington Nationals optioned 1B Andrés Chaparro to Rochester Red Wings. |