Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2017 |  | Philippe Senderos | DF | |||
| 07/2017 |  | Tomás Martínez | MF |  | S.C. Braga | S.C. Braga |
| 07/2017 |  | Devin Benton | DF |  | Atlanta United FC | Atlanta United |
| 06/2017 | | Kai Greene | DF | |||
| 06/2017 | | Eric Bird | MF | |||
| 06/2017 |  | Camilo Monroy | MF | |||
| 06/2017 |  | Rubén Luna | FW | |||
| 06/2017 | | Kyle Murphy | FW | |||
| 06/2017 |  | Jorginho James | MF |  | Rio Grande Valley FC | RGV FC |
| 03/2017 | | George Malki | DF | | Rio Grande Valley FC | RGV FC |
| 03/2017 |  | Joe Holland | MF | |||
| 01/2017 |  | Vicente Sánchez | FW | |||
| 01/2017 |  | A.J. DeLaGarza | DF |  | Los Angeles Galaxy | L.A. Galaxy |
| 01/2017 |  | Leonardo | DF | |||
| 01/2017 |  | Adolfo Machado | DF |  | Deportivo Saprissa | Saprissa |
| 01/2017 | | Dylan Remick | DF |  | Seattle Sounders | Seattle SFC |
| 01/2017 | | Juan Cabezas | MF |  | Independiente Medellín | Medellín |
| 01/2017 |  | Alberth Elis | FW |  | CF Monterrey | CF Monterrey |
| 01/2017 | | Romell Quioto | FW |  | CD Olimpia | CD Olimpia |
| 01/2017 | | Érick Torres | FW |  | Cruz Azul | Cruz Azul |
| 01/2017 | | Davy Arnaud | AS-CO |  | D.C. United | DC United |
| 01/2017 | | Steve Fell | AT-C | | Rio Grande Valley FC | RGV FC |
| 01/2017 | | Rohan Sachdev | G-AN | | Rio Grande Valley FC | RGV FC |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2017 | | Jorginho James | MF | | Rio Grande Valley FC | RGV FC |
| 01/2017 |  | Keyner Brown | DF |  | CS Herediano | CS Herediano |
| 01/2017 | | Taylor Hunter | DF | | Rio Grande Valley FC | RGV FC |
| 01/2017 |  | Kenny Mansally | DF |  | PS Kemi | PS Kemi |
| 01/2017 |  | Raúl Rodríguez | DF |  | Shanghai Shenxin | Shenxin |
| 01/2017 | | Sheanon Williams | DF |  | Vancouver Whitecaps | Vancouver |
| 01/2017 | | Yair Arboleda | MF | | Rio Grande Valley FC | RGV FC |
| 01/2017 | | Memo Rodríguez | MF | | Rio Grande Valley FC | RGV FC |
| 01/2017 | | Zach Steinberger | MF |  | Jacksonville Armada | Jacksonville |
| 01/2017 | | Collen Warner | MF |  | Minnesota United FC | Minnesota Utd |
| 01/2017 | | Will Bruin | FW | | Seattle Sounders | Seattle SFC |
| 01/2017 | | T.J. Casner | FW | | Rio Grande Valley FC | RGV FC |