Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 11/2019 |  | Carlos Quintero | FW |  | Minnesota United FC | Minnesota Utd |
| 11/2019 |  | Pablo Mastroeni | AS-CO | |||
| 11/2019 | | Omid Namazi | AS-CO | |||
| 10/2019 | | Tab Ramos | MA | |||
| 08/2019 |  | Niko Hansen | MF |  | Columbus Crew | Columbus Crew |
| 08/2019 | | Christian Ramírez | FW |  | Los Angeles FC | Los Angeles |
| 07/2019 | | Isidro Martínez | MF | |||
| 07/2019 | | Memo Rodríguez | MF |  | Rio Grande Valley FC | RGV FC |
| 07/2019 |  | José Bizama | DF |  | Huachipato | Huachipato |
| 06/2019 |  | Carlos Small | FW | |||
| 06/2019 |  | Kyle Adams | DF | |||
| 06/2019 |  | Michael Salazar | FW | |||
| 06/2019 | | Michael Nelson | GK | | Rio Grande Valley FC | RGV FC |
| 01/2019 | | Sam Junqua | DF | | Rio Grande Valley FC | RGV FC |
| 01/2019 | | Andrew Samuels | DF | |||
| 01/2019 | | Marlon Hairston | MF |  | Colorado Rapids | Colorado Rapids |
| 01/2019 | | Chris Duvall | DF |  | CF Montréal | Montréal |
| 01/2019 |  | Maynor Figueroa | DF |  | FC Dallas | FC Dallas |
| 01/2019 | | Erik McCue | DF | | Rio Grande Valley FC | RGV FC |
| 01/2019 |  | Aljaž Struna | DF |  | Palermo FC | Palermo |
| 01/2019 | | Tommy McNamara | MF |  | New York City FC | NY City FC |
| 01/2019 |  | Matías Vera | MF |  | O'Higgins | O'Higgins |
| 01/2019 | | Anthony Narcisi | PH-C |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 11/2019 | | Joe Willis | GK |  | Nashville SC | Nashville SC |
| 11/2019 | | Marlon Hairston | MF | | Minnesota United FC | Minnesota Utd |
| 08/2019 | | Chris Duvall | DF |  | OKC Energy FC | OKC Energy |
| 07/2019 | | Memo Rodríguez | MF | | Rio Grande Valley FC | RGV FC |
| 03/2019 | | Michael Nelson | GK | | Rio Grande Valley FC | RGV FC |
| 01/2019 | | Mac Steeves | FW |  | Hartford Athletic | Hartford Athl. |
| 01/2019 | | Chris Seitz | GK |  | D.C. United | DC United |
| 01/2019 | | Adolfo Machado | DF |  | The Strongest | The Strongest |
| 01/2019 | | Omar Ontiveros | DF |  | Ventura County FC | Ventura County FC |
| 01/2019 | | Manny Padilla | DF |  | New Mexico United | New Mexico Utd |
| 01/2019 | | Eric Alexander | MF |  | FC Cincinnati | Cincinnati |
| 01/2019 | | Luis Gil | MF |  | Gallos Blancos | Querétaro |
| 01/2019 | | Jhon Montaño | FW |  | Miami United | Miami United |