Nationals Roster & Staff
Transactions
| Date | Transaction |
| 07/31/23 | Washington Nationals placed RHP Trevor Williams on the bereavement list. |
| 07/31/23 | Washington Nationals signed RHP Austin Amaral. |
| 07/31/23 | Washington Nationals traded 3B Jeimer Candelario and cash to Chicago Cubs for LHP DJ Herz and SS Kevin Made. |
| 07/31/23 | Washington Nationals recalled RHP Hobie Harris from Rochester Red Wings. |
| 07/31/23 | Washington Nationals traded 3B Jeimer Candelario and cash to Chicago Cubs for LHP DJ Herz and SS Kevin Made. |
| 07/31/23 | Washington Nationals traded 3B Jeimer Candelario and cash to Chicago Cubs for LHP DJ Herz and SS Kevin Made. |
| 07/30/23 | Washington Nationals placed RHP Rico Garcia on the 15-day injured list. Biceps tendinitis. |
| 07/30/23 | Washington Nationals recalled RHP Amos Willingham from Rochester Red Wings. |
| 07/26/23 | Washington Nationals activated RHP Andrés Machado. |
| 07/26/23 | Washington Nationals transferred CF Victor Robles from the 10-day injured list to the 60-day injured list. Back spasms in the lumbar spine. |
| 07/26/23 | Washington Nationals optioned RHP Amos Willingham to Rochester Red Wings. |
| 07/26/23 | Washington Nationals selected the contract of RHP Andrés Machado from Rochester Red Wings. |
| 07/25/23 | Washington Nationals signed free agent OF Brandon Pimentel to a minor league contract. |
| 07/22/23 | Washington Nationals signed free agent RHP Matthew Bollenbacher to a minor league contract. |
| 07/21/23 | Washington Nationals signed free agent RHP Nash Walters to a minor league contract. |
| 07/21/23 | Washington Nationals sent C Israel Pineda on a rehab assignment to Wilmington Blue Rocks. |
| 07/19/23 | Washington Nationals placed RHP Paolo Espino on the 15-day injured list. Flexor strain of his fourth right finger. |
| 07/19/23 | Washington Nationals placed C Israel Pineda on the 60-day injured list. Right finger fracture. |
| 07/19/23 | Washington Nationals signed C Nate Rombach. |
| 07/19/23 | Washington Nationals selected the contract of RHP Rico Garcia from Rochester Red Wings. |
| 07/18/23 | Washington Nationals sent C Israel Pineda on a rehab assignment to FCL Nationals. |
| 07/18/23 | Washington Nationals sent C Israel Pineda on a rehab assignment to FCL Nationals. |
| 07/18/23 | Washington Nationals signed OF Elijah Nunez. |
| 07/17/23 | Washington Nationals activated LHP Patrick Corbin from the paternity list. |
| 07/17/23 | Washington Nationals signed 3B Yohandy Morales. |
| 07/17/23 | Washington Nationals placed RHP Hunter Harvey on the 15-day injured list retroactive to July 16, 2023. Right elbow strain. |
| 07/17/23 | Washington Nationals signed OF Andrew Pinckney. |
| 07/17/23 | Washington Nationals signed SS Marcus Brown. |
| 07/17/23 | Washington Nationals optioned RHP Roddery Muñoz to Rochester Red Wings. |
| 07/17/23 | Washington Nationals claimed RHP Roddery Muñoz off waivers from Atlanta Braves. |
| 07/17/23 | Washington Nationals optioned RHP Joan Adon to Rochester Red Wings. |
| 07/17/23 | Washington Nationals recalled LHP Joe La Sorsa from Rochester Red Wings. |
| 07/16/23 | Washington Nationals optioned 3B Jake Alu to Rochester Red Wings. |
| 07/15/23 | Washington Nationals signed free agent RHP Rico Garcia to a minor league contract. |
| 07/15/23 | Washington Nationals recalled 3B Jake Alu from Rochester Red Wings. |
| 07/14/23 | Washington Nationals placed LHP Patrick Corbin on the paternity list. |
| 07/14/23 | Washington Nationals recalled RHP Paolo Espino from Rochester Red Wings. |
| 07/13/23 | Washington Nationals signed C Ryan Snell. |
| 07/13/23 | Washington Nationals signed SS Phillip Glasser. |
| 07/12/23 | Washington Nationals signed RHP Thomas Schultz. |
| 07/10/23 | Washington Nationals signed 2B Gavin Dugas. |
| 07/10/23 | Washington Nationals signed LHP Jared Simpson. |
| 07/07/23 | Washington Nationals recalled RHP Joan Adon from Rochester Red Wings. |
| 07/07/23 | Washington Nationals sent CF Derek Hill outright to Rochester Red Wings. |
| 07/07/23 | Washington Nationals optioned LHP Joe La Sorsa to Rochester Red Wings. |
| 07/06/23 | RHP Luis Cessa assigned to Washington Nationals. |
| 07/06/23 | RHP Luis Cessa roster status changed by Washington Nationals. |
| 07/05/23 | Washington Nationals designated CF Derek Hill for assignment. |
| 07/05/23 | Washington Nationals recalled CF Alex Call from Rochester Red Wings. |
| 07/04/23 | Washington Nationals signed free agent RHP Jose Hernandez to a minor league contract. |
| 07/04/23 | Washington Nationals signed free agent RHP Jose Brito to a minor league contract. |
| 07/03/23 | Washington Nationals placed RHP Thaddeus Ward on the 15-day injured list. Right shoulder inflammation. |
| 07/03/23 | Washington Nationals signed free agent RHP Daniel Mengden to a minor league contract. |
| 07/03/23 | Washington Nationals signed free agent C Jacob Nottingham to a minor league contract. |
| 07/03/23 | Washington Nationals activated LHP Patrick Corbin from the bereavement list. |
| 07/01/23 | Washington Nationals signed RHP Dakota Donovan. |
| 07/01/23 | Washington Nationals signed free agent RHP Patrick Ruotolo to a minor league contract. |