Nationals Roster & Staff
Transactions
| Date | Transaction |
| 08/22/26 | Washington Nationals transferred LHP Connelly Early from the 15-day injured list to the 60-day injured list. Left elbow inflammation. |
| 08/22/26 | Washington Nationals claimed RHP Matt Waldron off waivers from Toronto Blue Jays. |
| 08/19/26 | Washington Nationals optioned RHP Yovanny Cruz to Rochester Red Wings. |
| 08/19/26 | Washington Nationals selected the contract of LHP Erik Tolman from Rochester Red Wings. |
| 08/18/26 | Washington Nationals sent RHP Josiah Gray on a rehab assignment to Fredericksburg Nationals. |
| 08/14/26 | Washington Nationals sent LHP DJ Herz on a rehab assignment to Harrisburg Senators. |
| 08/14/26 | Washington Nationals released RHP Miles Mikolas. |
| 08/13/26 | Washington Nationals signed free agent SS Liover Peguero to a minor league contract. |
| 08/12/26 | Washington Nationals designated RHP Miles Mikolas for assignment. |
| 08/12/26 | Washington Nationals selected the contract of LHP Jackson Kent from Rochester Red Wings. |
| 08/09/26 | Washington Nationals recalled RHP Jake Bird from Rochester Red Wings. |
| 08/09/26 | Washington Nationals optioned LHP Carson Palmquist to Rochester Red Wings. |
| 08/08/26 | Washington Nationals sent LHP DJ Herz on a rehab assignment to Fredericksburg Nationals. |
| 08/07/26 | Washington Nationals released RHP Zack Littell. |
| 08/07/26 | Washington Nationals optioned RHP Wyatt Mills to Rochester Red Wings. |
| 08/06/26 | Washington Nationals claimed RHP Wyatt Mills off waivers from Los Angeles Dodgers. |
| 08/06/26 | Washington Nationals optioned RHP Wyatt Mills to Rochester Red Wings. |
| 08/05/26 | Washington Nationals released RF Joey Wiemer. |
| 08/05/26 | Washington Nationals activated RHP Brad Lord from the 15-day injured list. |
| 08/05/26 | Washington Nationals designated RHP Zack Littell for assignment. |
| 08/04/26 | Washington Nationals placed RF James Wood on the 10-day injured list. Left oblique strain. |
| 08/04/26 | Washington Nationals signed free agent LHP Matt Krook to a minor league contract. |
| 08/04/26 | Washington Nationals optioned RHP Eddy Yean to Rochester Red Wings. |
| 08/04/26 | Washington Nationals selected the contract of LF Andrew Pinckney from Rochester Red Wings. |
| 08/03/26 | Washington Nationals activated RHP Yovanny Cruz. |
| 08/03/26 | Washington Nationals activated LHP Will Dion. |
| 08/03/26 | Washington Nationals traded 1B Luis García Jr. to New York Yankees for RHP Ben Grable, RHP Yovanny Cruz, RHP Jack Cebert and RHP Jake Bird. |
| 08/03/26 | Washington Nationals traded 1B Luis García Jr. to New York Yankees for RHP Ben Grable, RHP Yovanny Cruz, RHP Jack Cebert and RHP Jake Bird. |
| 08/03/26 | Washington Nationals traded 1B Luis García Jr. to New York Yankees for RHP Ben Grable, RHP Yovanny Cruz, RHP Jack Cebert and RHP Jake Bird. |
| 08/03/26 | Washington Nationals traded LHP Foster Griffin to Cleveland Guardians for LHP Will Dion, LHP Josh Hartle, OF Nick Mitchell and RHP Kendeglys Virguez. |
| 08/03/26 | Washington Nationals traded LHP Foster Griffin to Cleveland Guardians for LHP Will Dion, LHP Josh Hartle, OF Nick Mitchell and RHP Kendeglys Virguez. |
| 08/03/26 | Washington Nationals traded LHP Foster Griffin to Cleveland Guardians for LHP Will Dion, LHP Josh Hartle, OF Nick Mitchell and RHP Kendeglys Virguez. |
| 08/03/26 | Washington Nationals traded LHP Foster Griffin to Cleveland Guardians for LHP Will Dion, LHP Josh Hartle, OF Nick Mitchell and RHP Kendeglys Virguez. |
| 08/03/26 | Washington Nationals traded LHP Foster Griffin to Cleveland Guardians for LHP Will Dion, LHP Josh Hartle, OF Nick Mitchell and RHP Kendeglys Virguez. |
| 08/03/26 | Washington Nationals traded 1B Luis García Jr. to New York Yankees for RHP Ben Grable, RHP Yovanny Cruz, RHP Jack Cebert and RHP Jake Bird. |
| 08/03/26 | Washington Nationals optioned RHP Jake Bird to Rochester Red Wings. |
| 08/03/26 | Washington Nationals traded LF Christian Franklin to Baltimore Orioles for RHP Joe Glassey. |
| 08/03/26 | Washington Nationals traded LF Christian Franklin to Baltimore Orioles for RHP Joe Glassey. |
| 08/03/26 | Washington Nationals optioned RHP Riley Cornelio to Rochester Red Wings. |
| 08/03/26 | Washington Nationals recalled 1B Abimelec Ortiz from Rochester Red Wings. |
| 08/03/26 | Washington Nationals traded 1B Luis García Jr. to New York Yankees for RHP Ben Grable, RHP Yovanny Cruz, RHP Jack Cebert and RHP Jake Bird. |
| 08/03/26 | Washington Nationals recalled LHP Andrew Alvarez from Rochester Red Wings. |
| 08/02/26 | Washington Nationals transferred LHP PJ Poulin from the 15-day injured list to the 60-day injured list. Left flexor strain. |
| 08/01/26 | Washington Nationals sent RHP Brad Lord on a rehab assignment to Rochester Red Wings. |