Nationals Roster & Staff
Transactions
| Date | Transaction |
| 06/30/17 | Washington Nationals sent OF Chris Heisey on a rehab assignment to Syracuse Chiefs. |
| 06/30/17 | Washington Nationals transferred LHP Sammy Solis from the 10-day disabled list to the 60-day disabled list. Left elbow inflammation. |
| 06/30/17 | Washington Nationals placed SS Trea Turner on the 10-day disabled list. Right wrist fracture. |
| 06/30/17 | Washington Nationals selected the contract of Adrian Sanchez from Syracuse Chiefs. |
| 06/30/17 | Washington Nationals signed LHP Max Engelbrekt. |
| 06/28/17 | Washington Nationals signed free agent 3B Dan Gamache to a minor league contract. |
| 06/26/17 | Washington Nationals signed free agent RHP Kevin Jepsen to a minor league contract. |
| 06/23/17 | Washington Nationals signed OF Eric Senior. |
| 06/23/17 | Washington Nationals recalled Wilmer Difo from Syracuse Chiefs. |
| 06/22/17 | Washington Nationals optioned RHP A.J. Cole to Syracuse Chiefs. |
| 06/20/17 | Washington Nationals signed free agent RHP Brady Dragmire to a minor league contract. |
| 06/20/17 | Washington Nationals signed OF Austin Guibor. |
| 06/20/17 | Washington Nationals signed 1B Jackson Cramer. |
| 06/20/17 | Washington Nationals signed RHP Gabe Klobosits. |
| 06/20/17 | Washington Nationals signed LHP Nick Raquet. |
| 06/20/17 | Washington Nationals signed RHP Kyle Johnston. |
| 06/20/17 | Washington Nationals signed RHP Jackson Tetreault. |
| 06/20/17 | Washington Nationals signed RHP Jared Brasher. |
| 06/20/17 | Washington Nationals signed LHP Alex Troop. |
| 06/20/17 | Washington Nationals signed RHP Trey Turner. |
| 06/20/17 | Washington Nationals signed LHP Nelson Galindez. |
| 06/20/17 | Washington Nationals signed 1B Jamori Blash. |
| 06/20/17 | Washington Nationals signed RHP David Smith. |
| 06/20/17 | Washington Nationals signed OF Kameron Esthay. |
| 06/20/17 | Washington Nationals signed RHP Jeremy McKinney. |
| 06/20/17 | Washington Nationals signed 2B Phil Caulfield. |
| 06/20/17 | Washington Nationals signed OF Justin Connell. |
| 06/20/17 | Washington Nationals signed LHP Jackson Stoeckinger. |
| 06/20/17 | Washington Nationals signed C Anthony Peroni. |
| 06/20/17 | Washington Nationals signed 1B Jake Scudder. |
| 06/20/17 | Washington Nationals signed LHP Jared Johnson. |
| 06/20/17 | Washington Nationals signed OF Jonathan Pryor. |
| 06/20/17 | Washington Nationals signed RHP Jake Cousins. |
| 06/20/17 | Washington Nationals signed RHP Leif Strom. |
| 06/20/17 | Washington Nationals signed C Nic Perkins. |
| 06/20/17 | Washington Nationals signed C Adalberto Carrillo. |
| 06/18/17 | Washington Nationals placed RHP Shawn Kelley on the 10-day disabled list retroactive to June 17, 2017. Right trapezius strain. |
| 06/18/17 | Washington Nationals recalled A.J. Cole from Syracuse Chiefs. |
| 06/16/17 | Washington Nationals signed free agent OF Darian Sandford to a minor league contract. |
| 06/15/17 | Washington Nationals signed free agent RHP Edwin Jackson to a minor league contract. |
| 06/15/17 | Washington Nationals recalled LHP Matt Grace from Syracuse Chiefs. |
| 06/15/17 | Washington Nationals optioned RHP Trevor Gott to Syracuse Chiefs. |
| 06/15/17 | Washington Nationals sent LHP Sammy Solis on a rehab assignment to Syracuse Chiefs. |
| 06/14/17 | Washington Nationals signed free agent OF Alejandro De Aza to a minor league contract. |
| 06/13/17 | Washington Nationals signed LF Alejandro De Aza. |
| 06/12/17 | Washington Nationals recalled Trevor Gott from Syracuse Chiefs. |
| 06/12/17 | Washington Nationals optioned SS Wilmer Difo to Syracuse Chiefs. |
| 06/11/17 | Washington Nationals placed RHP Koda Glover on the 10-day disabled list. Lower back stiffness. |
| 06/11/17 | Washington Nationals activated RHP Joe Blanton from the 10-day disabled list. |
| 06/09/17 | Washington Nationals sent RHP Rafael Martin outright to Syracuse Chiefs. |
| 06/08/17 | Washington Nationals sent RHP Joe Blanton on a rehab assignment to Harrisburg Senators. |
| 06/07/17 | Washington Nationals traded RHP Mick VanVossen to Chicago White Sox. |
| 06/05/17 | Washington Nationals placed LF Jayson Werth on the 10-day disabled list retroactive to June 4, 2017. Left foot contusion. |
| 06/05/17 | Washington Nationals selected the contract of LF Ryan Raburn from Syracuse Chiefs. |
| 06/05/17 | Washington Nationals designated RHP Rafael Martin for assignment. |
| 06/04/17 | Washington Nationals activated RF Bryce Harper. |
| 06/01/17 | Washington Nationals optioned LF Jose Marmolejos to Harrisburg Senators. |
| 06/01/17 | Washington Nationals reassigned 1B Jose Marmolejos to the minor leagues. |
| 06/01/17 | Washington Nationals transferred CF Adam Eaton from the 10-day disabled list to the 60-day disabled list. Strained left knee. |