Nationals Roster & Staff
Transactions
| Date | Transaction |
| 04/16/26 | RHP Miles Mikolas changed number to 36. |
| 04/16/26 | C Drew Millas changed number to 14. |
| 04/16/26 | SS Nasim Nuñez changed number to 26. |
| 04/16/26 | 1B Curtis Mead changed number to 45. |
| 04/16/26 | RHP Jake Irvin changed number to 27. |
| 04/16/26 | RHP Zack Littell changed number to 18. |
| 04/16/26 | RHP Brad Lord changed number to 41. |
| 04/16/26 | RF Daylen Lile changed number to 4. |
| 04/16/26 | RHP Clayton Beeter changed number to 39. |
| 04/16/26 | 2B Luis García Jr. changed number to 2. |
| 04/16/26 | RHP Cade Cavalli changed number to 24. |
| 04/16/26 | LHP Foster Griffin changed number to 22. |
| 04/16/26 | 3B Brady House changed number to 12. |
| 04/16/26 | SS CJ Abrams changed number to 5. |
| 04/16/26 | C Keibert Ruiz changed number to 20. |
| 04/16/26 | LHP PJ Poulin changed number to 50. |
| 04/16/26 | LHP Mitchell Parker changed number to 70. |
| 04/16/26 | RHP Orlando Ribalta changed number to 64. |
| 04/16/26 | LHP Cionel Pérez changed number to 51. |
| 04/16/26 | RHP Gus Varland changed number to 47. |
| 04/16/26 | 3B José Tena changed number to 8. |
| 04/16/26 | RHP Paxton Schultz changed number to 75. |
| 04/16/26 | 2B Jorbit Vivas changed number to 84. |
| 04/16/26 | LF Joey Wiemer changed number to 21. |
| 04/16/26 | CF Jacob Young changed number to 30. |
| 04/16/26 | LF James Wood changed number to 29. |
| 04/16/26 | Washington Nationals transferred LHP Ken Waldichuk from the 15-day injured list to the 60-day injured list. Left forearm tightness. |
| 04/16/26 | New York Mets traded LHP Richard Lovelady to Washington Nationals for cash. |
| 04/15/26 | 1B Curtis Mead changed number to 42. |
| 04/15/26 | LHP PJ Poulin changed number to 42. |
| 04/15/26 | 3B José Tena changed number to 42. |
| 04/15/26 | RF Daylen Lile changed number to 42. |
| 04/15/26 | RHP Clayton Beeter changed number to 42. |
| 04/15/26 | 2B Jorbit Vivas changed number to 42. |
| 04/15/26 | RHP Miles Mikolas changed number to 42. |
| 04/15/26 | C Keibert Ruiz changed number to 42. |
| 04/15/26 | RHP Jake Irvin changed number to 42. |
| 04/15/26 | LHP Foster Griffin changed number to 42. |
| 04/15/26 | LF James Wood changed number to 42. |
| 04/15/26 | RHP Zack Littell changed number to 42. |
| 04/15/26 | SS CJ Abrams changed number to 42. |
| 04/15/26 | RHP Cade Cavalli changed number to 42. |
| 04/15/26 | 2B Luis García Jr. changed number to 42. |
| 04/15/26 | SS Nasim Nuñez changed number to 42. |
| 04/15/26 | LF Joey Wiemer changed number to 42. |
| 04/15/26 | C Drew Millas changed number to 42. |
| 04/15/26 | RHP Gus Varland changed number to 42. |
| 04/15/26 | RHP Orlando Ribalta changed number to 42. |
| 04/15/26 | LHP Mitchell Parker changed number to 42. |
| 04/15/26 | LHP Cionel Pérez changed number to 42. |
| 04/15/26 | RHP Brad Lord changed number to 42. |
| 04/15/26 | RHP Paxton Schultz changed number to 42. |
| 04/15/26 | 3B Brady House changed number to 42. |
| 04/15/26 | CF Jacob Young changed number to 42. |
| 04/14/26 | Washington Nationals optioned RHP Jackson Rutledge to Rochester Red Wings. |
| 04/14/26 | Washington Nationals recalled LHP Mitchell Parker from Rochester Red Wings. |
| 04/13/26 | Washington Nationals placed LHP Ken Waldichuk on the 15-day injured list. Left forearm tightness. |
| 04/13/26 | Washington Nationals placed RHP Cole Henry on the 15-day injured list. Right rotator cuff strain. |
| 04/13/26 | Washington Nationals recalled RHP Orlando Ribalta from Rochester Red Wings. |
| 04/13/26 | Washington Nationals recalled RHP Jackson Rutledge from Rochester Red Wings. |
| 04/08/26 | Washington Nationals signed free agent C Brady Cerkownyk to a minor league contract. |
| 04/07/26 | Washington Nationals activated RHP Paxton Schultz from the 15-day injured list. |
| 04/07/26 | Washington Nationals optioned RHP Andre Granillo to Rochester Red Wings. |
| 04/01/26 | Washington Nationals traded LHP Jake Eder to Los Angeles Dodgers for cash. |