Nationals Roster & Staff
Transactions
| Date | Transaction |
| 07/31/17 | Washington Nationals traded Future Considerations and LHP Tyler Watson to Minnesota Twins for RHP Brandon Kintzler. |
| 07/31/17 | Washington Nationals designated RHP Jimmy Cordero for assignment. |
| 07/31/17 | Washington Nationals optioned C Pedro Severino to Syracuse Chiefs. |
| 07/31/17 | Washington Nationals sent OF Michael Taylor on a rehab assignment to Potomac Nationals. |
| 07/31/17 | Washington Nationals traded Future Considerations and LHP Tyler Watson to Minnesota Twins for RHP Brandon Kintzler. |
| 07/31/17 | Washington Nationals released 1B Matt Skole. |
| 07/30/17 | Washington Nationals selected the contract of Erick Fedde from Syracuse Chiefs. |
| 07/30/17 | Washington Nationals released LF Chris Heisey. |
| 07/29/17 | Washington Nationals placed 3B Stephen Drew on the 10-day disabled list. Abdominal strain |
| 07/29/17 | Washington Nationals activated LF Howie Kendrick. |
| 07/29/17 | Washington Nationals designated 1B Matt Skole for assignment. |
| 07/29/17 | Washington Nationals sent RHP Shawn Kelley on a rehab assignment to Syracuse Chiefs. |
| 07/28/17 | Philadelphia Phillies traded LF Howie Kendrick and cash to Washington Nationals for LHP McKenzie Mills and Future Considerations. |
| 07/28/17 | Philadelphia Phillies traded LF Howie Kendrick and cash to Washington Nationals for LHP McKenzie Mills and Future Considerations. |
| 07/27/17 | Washington Nationals placed LF Ryan Raburn on the 10-day disabled list retroactive to July 23, 2017. Left trapezius strain. |
| 07/27/17 | Washington Nationals signed free agent RHP Connor Zwetsch to a minor league contract. |
| 07/27/17 | Washington Nationals recalled Sammy Solis from Syracuse Chiefs. |
| 07/27/17 | Washington Nationals placed RHP Stephen Strasburg on the 10-day disabled list retroactive to July 24, 2017. Right elbow nerve impingement. |
| 07/27/17 | Washington Nationals signed free agent 1B Chad Huffman to a minor league contract. |
| 07/27/17 | Washington Nationals signed free agent RHP Neil Ramirez to a minor league contract. |
| 07/23/17 | Washington Nationals transferred LF Jayson Werth from the 10-day disabled list to the 60-day disabled list. Left foot contusion. |
| 07/23/17 | Washington Nationals placed LF Ryan Raburn on the bereavement list. |
| 07/23/17 | Washington Nationals recalled Pedro Severino from Syracuse Chiefs. |
| 07/23/17 | Washington Nationals selected the contract of Andrew Stevenson from Syracuse Chiefs. |
| 07/23/17 | Washington Nationals placed LF Chris Heisey on the 10-day disabled list. Left groin strain. |
| 07/22/17 | Washington Nationals signed free agent SS Bengie Gonzalez to a minor league contract. |
| 07/19/17 | Washington Nationals sent RHP Jacob Turner outright to Syracuse Chiefs. |
| 07/18/17 | Washington Nationals reassigned RHP Trevor Gott to the minor leagues. |
| 07/18/17 | Washington Nationals activated RHP Ryan Madson. |
| 07/18/17 | Washington Nationals optioned RHP Trevor Gott to Syracuse Chiefs. |
| 07/18/17 | Washington Nationals selected the contract of RHP Edwin Jackson from Syracuse Chiefs. |
| 07/18/17 | Washington Nationals designated RHP Jacob Turner for assignment. |
| 07/18/17 | Washington Nationals activated LHP Sean Doolittle. |
| 07/18/17 | Washington Nationals optioned RHP Austin Adams to Syracuse Chiefs. |
| 07/17/17 | Washington Nationals transferred RHP Koda Glover from the 10-day disabled list to the 60-day disabled list. Lower back stiffness. |
| 07/17/17 | Washington Nationals selected the contract of RHP Jacob Turner from Syracuse Chiefs. |
| 07/17/17 | Washington Nationals signed free agent P Daniel Butler to a minor league contract. |
| 07/16/17 | Washington Nationals transferred RHP Joe Ross from the 10-day disabled list to the 60-day disabled list. |
| 07/16/17 | Oakland Athletics traded RHP Ryan Madson and LHP Sean Doolittle to Washington Nationals for RHP Blake Treinen, LHP Jesus Luzardo and 3B Sheldon Neuse. |
| 07/16/17 | Oakland Athletics traded RHP Ryan Madson and LHP Sean Doolittle to Washington Nationals for RHP Blake Treinen, LHP Jesus Luzardo and 3B Sheldon Neuse. |
| 07/16/17 | Oakland Athletics traded RHP Ryan Madson and LHP Sean Doolittle to Washington Nationals for RHP Blake Treinen, LHP Jesus Luzardo and 3B Sheldon Neuse. |
| 07/16/17 | Oakland Athletics traded RHP Ryan Madson and LHP Sean Doolittle to Washington Nationals for RHP Blake Treinen, LHP Jesus Luzardo and 3B Sheldon Neuse. |
| 07/16/17 | Oakland Athletics traded RHP Ryan Madson and LHP Sean Doolittle to Washington Nationals for RHP Blake Treinen, LHP Jesus Luzardo and 3B Sheldon Neuse. |
| 07/15/17 | Washington Nationals signed free agent LHP Sean Adler to a minor league contract. |
| 07/14/17 | Washington Nationals recalled Trevor Gott from Syracuse Chiefs. |
| 07/14/17 | Washington Nationals recalled Austin Adams from Syracuse Chiefs. |
| 07/14/17 | Washington Nationals placed RHP Joe Ross on the 10-day disabled list retroactive to July 11, 2017. Right elbow sprain. |
| 07/13/17 | Washington Nationals signed free agent 3B Michael Almanzar to a minor league contract. |
| 07/10/17 | Washington Nationals optioned LHP Sammy Solis to Syracuse Chiefs. |
| 07/07/17 | Washington Nationals placed CF Michael A. Taylor on the 10-day disabled list. Right oblique strain. |
| 07/07/17 | Washington Nationals activated LF Chris Heisey from the 10-day disabled list. |
| 07/07/17 | Washington Nationals signed LHP Seth Romero. |
| 07/07/17 | Washington Nationals signed 2B Cole Freeman. |
| 07/07/17 | Washington Nationals signed RHP Wil Crowe. |
| 07/07/17 | Washington Nationals signed C Alex Dunlap. |
| 07/05/17 | Washington Nationals signed OF Nick Choruby. |
| 07/05/17 | Washington Nationals signed free agent OF Tristan Hansack to a minor league contract. |
| 07/05/17 | Washington Nationals signed free agent RHP Francisco Rodriguez to a minor league contract. |
| 07/05/17 | Washington Nationals signed free agent OF Leandro Emiliani to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent SS Ryan Merrill to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent OF Edangel Tovar to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent SS Ryan Jackson to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent OF Jorge Hurtado to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent 2B Daniel Hernandez to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent RHP Bryan Caceres to a minor league contract. |
| 07/03/17 | Washington Nationals sent RHP Jacob Turner outright to Syracuse Chiefs. |
| 07/03/17 | Washington Nationals signed free agent RHP Charls Jameson to a minor league contract. |
| 07/03/17 | Washington Nationals signed free agent RHP Karlo Seijas to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent 3B Addiel Matias to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent C Ivan Murzi to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent OF Christopher De La to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent SS Viandel Pena to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent OF Braian Fernandez to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent SS Wilfrido Matos to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent LHP Jose A. Ferrer to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent IF Guillermo Tatis to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent RHP Eddy Yean to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent RHP Yimy Carty to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent RHP Yohanse Morel to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent RHP Fausto Segura to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent RHP Manuel De La Rosa to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent C Frailin Turbi to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent LHP Osvaldo Oquel to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent LHP Bryan Pena to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent RHP Randy Munoz to a minor league contract. |
| 07/02/17 | Washington Nationals signed free agent OF Andry Arias to a minor league contract. |
| 07/01/17 | Washington Nationals designated RHP Jacob Turner for assignment. |
| 07/01/17 | Washington Nationals signed RHP Brigham Hill. |
| 07/01/17 | Sammy Solis roster status changed by Washington Nationals. |