Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2021 |  | Ramón Ábila | FW |  | Minnesota United FC | Minnesota Utd |
| 07/2021 |  | Oka Nikolov | GK-CO | |||
| 05/2021 |  | Drew Skundrich | MF |  | Loudoun United | Loudoun United |
| 04/2021 |  | Tony Alfaro | DF | |||
| 04/2021 |  | Andy Nájar | DF | |||
| 04/2021 |  | Lucy Rushton | CH-AN |  | Atlanta United FC | Atlanta United |
| 03/2021 | | Paul Arriola | MF |  | Swansea City | Swansea |
| 03/2021 |  | Nigel Robertha | FW |  | Levski Sofia | Levski |
| 03/2021 |  | Jovanny Bolívar | FW |  | Deportivo La Guaira | Deportivo La Guaira |
| 03/2021 | | Brendan Hines-Ike | DF |  | KV Kortrijk | Kortrijk |
| 01/2021 | | Michael DeShields | DF |  | Wake Forest Demon Deacons | Wake Forest |
| 01/2021 | | Kimarni Smith | FW |  | Clemson Tigers | Clemson Tigers |
| 01/2021 | | Hernán Losada | MA |  | K Beerschot VA | K Beerschot VA |
| 01/2021 | | Jon Kempin | GK |  | Columbus Crew | Columbus Crew |
| 01/2021 | | Adrien Pérez | FW |  | Los Angeles FC | Los Angeles |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2021 |  | Erik Sorga | FW |  | VVV-Venlo | VVV |
| 04/2021 | | Jovanny Bolívar | FW | | Loudoun United | Loudoun United |
| 02/2021 | | Gelmín Rivas | FW |  | Al Shorta | Al Shorta |
| 02/2021 |  | Oniel Fisher | DF |  | Los Angeles Galaxy | L.A. Galaxy |
| 02/2021 | | Paul Arriola | MF | | Swansea City | Swansea |
| 01/2021 |  | Axel Sjöberg | DF |  | San Antonio FC | San Antonio FC |
| 01/2021 | | Nolan Sheldon | AS-CO |  | Austin FC | Austin FC |