Entradas
| a partir de | Apellido | Pos | Equipo | Equipo | ||
|---|---|---|---|---|---|---|
| 12/2021 |  | Victor Bezerra | A |  | Chicago Fire (Preseason) | Chicago Fire (Preseason) |
| 12/2021 | | Spencer Richey | P |  | Seattle Sounders | Seattle SFC |
| 12/2021 | | C.J. Brown | As |  | Chicago House AC | Chicago House |
| 12/2021 | | Junior Gonzalez | As |  | Ventura County FC | Ventura County FC |
| 09/2021 |  | Ludovic Taillandier | As |  | Chicago Fire Academy | Chicago Fire Academy |
| 09/2021 | | Javier Casas | M |  | Forward Madison FC | Forward Madison FC |
| 08/2021 |  | Federico Navarro | M |  | Talleres de Córdoba | Talleres |
| 03/2021 | | Kevin Minkus | AN-CH | |||
| 01/2021 | | Chris Brady | P | | Forward Madison FC | Forward Madison FC |
| 01/2021 |  | Jhon Espínoza | D |  | Aucas | SD Aucas |
| 01/2021 |  | Stanislav Ivanov | M |  | Levski Sofia | Levski |
| 01/2021 |  | Chinonso Offor | A |  | FK RFS | FK RFS |
Salidas
| a partir de | Apellido | Pos | Equipo | Equipo | ||
|---|---|---|---|---|---|---|
| 08/2021 |  | Przemysław Frankowski | M |  | RC Lens | RC Lens |
| 07/2021 | | Javier Casas | M | | Forward Madison FC | Forward Madison FC |
| 07/2021 |  | David Zdrilić | As |  | KV Oostende | KV Oostende |
| 05/2021 | | Andre Reynolds | D |  | Memphis 901 | Memphis 901 |
| 02/2021 |  | Mike Azira | M |  | New Mexico United | New Mexico Utd |
| 01/2021 | | Jeremiah Gutjahr | M |  | Indy Eleven | Indy Eleven |