Washington: every transfer in and out, fees paid and earned, squad market value.
| Date | Player | From | To | Fee |
|---|---|---|---|---|
| 2025-03-03 | Peter Kingston | Washington | Tacoma Defiance | Free |
| 2024-09-15 | Gavin Muens | Washington | Kaya FC | Free |
| 2024-03-07 | Gavin Muens | Washington | FC Olympia | Loan |
| 2024-02-10 | Peter Kingston | Washington | Ballard FC | Loan |
| 2024-01-01 | Gavin Muens | Schweinfurt 05 | Washington | Free |
| 2023-12-19 | Kalani Kossa-Rienzi | Washington | Seattle | Free |
| 2023-08-01 | Peter Kingston | Redhawks | Washington | Free |
| 2023-04-01 | Kalani Kossa-Rienzi | Washington | Crossfire | Loan |
| 2022-01-11 | Ryan Sailor | Washington | Miami | Free |
| 2021-01-21 | Ethan Bartlow | Washington | Houston | Free |
| 2019-05-01 | Ethan Bartlow | Washington | Crossfire | Loan |
| 2018-08-01 | Ethan Bartlow | Crossfire Acad. | Washington | Free |
| 2017-05-01 | Ryan Sailor | Washington | Colorado U23 | Loan |
| 2017-01-18 | Henry Wingo | Washington | Seattle | Free |
| 2016-08-01 | Ryan Sailor | Real Colorado | Washington | Free |
| 2015-05-01 | Henry Wingo | Washington | PSA Elite | Loan |
| 2015-01-15 | Cristian Roldán | Washington | Seattle | Free |
| 2014-08-01 | Henry Wingo | Seattle Academy | Washington | Free |
| 2014-05-01 | Cristian Roldán | Washington | Crossfire | Loan |