Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2018 |  | Abel Aguilar | MF |  | Deportivo Cali | Deportivo Cali |
| 07/2018 |  | Moisés Hernández | DF |  | Comunicaciones | Comunicaciones |
| 07/2018 |  | Thomas Roberts | MF |  | FC Dallas U19 | U19 |
| 07/2018 |  | Pablo Aránguiz | MF |  | Unión Española | Unión Española |
| 07/2018 |  | Dom Badji | FW |  | Colorado Rapids | Colorado Rapids |
| 07/2018 |  | Marquinhos Pedroso | DF |  | Ferencvárosi TC | Ferencváros |
| 04/2018 | | Chris Richards | DF | | FC Dallas U19 | U19 |
| 02/2018 | | Kyle Zobeck | GK | |||
| 02/2018 | | Harold Mosquera | FW |  | Millonarios | Millonarios |
| 01/2018 |  | Francis Atuahene | FW |  | OKC Energy FC | OKC Energy |
| 01/2018 | | Mauro Cichero | FW | |||
| 01/2018 | | Ema Twumasi | FW | | OKC Energy FC | OKC Energy |
| 01/2018 | | Jordan Cano | DF | |||
| 01/2018 | | Kris Reaves | DF | |||
| 01/2018 | | Brandon Servania | MF |  | FC Dallas (Preseason) | FC Dallas (Preseason) |
| 01/2018 |  | Reto Ziegler | DF |  | FC Luzern | FC Luzern |
| 01/2018 | | Jimmy Maurer | GK |  | New York Cosmos | Cosmos |
| 01/2018 |  | Aníbal Chalá | DF |  | LDU Quito | LDU Quito |
| 01/2018 |  | Anton Nedyalkov | DF |  | CSKA Sofia | CSKA Sofia |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2018 | | Moisés Hernández | DF |  | San Antonio FC | San Antonio FC |
| 07/2018 | | Kellyn Acosta | MF | | Colorado Rapids | Colorado Rapids |
| 07/2018 | | Chris Richards | DF |  | Bayern Munich U19 | Bayern Munich U19 |
| 07/2018 |  | Mauro Díaz | MF |  | Shabab Al Ahli Club | Al Ahli |
| 07/2018 | | Anton Nedyalkov | DF |  | PFC Ludogorets Razgrad | Ludogorets |
| 07/2018 |  | Jamie Browne | FW |  | UWS Upsetters SC | UWS Upsetters SC |
| 01/2018 | | Aníbal Chalá | DF | | LDU Quito | LDU Quito |
| 01/2018 | | Chris Seitz | GK |  | Houston Dynamo | H. Dynamo |
| 01/2018 | | Hernán Grana | DF |  | Ferro Carril Oeste | Ferro CO |
| 01/2018 | | Walker Zimmerman | DF |  | Los Angeles FC | Los Angeles |
| 01/2018 |  | Carlos Cermeño | MF |  | Alianza FC | Alianza |
| 01/2018 | | Luis González | MF |  | Monagas | Monagas |
| 01/2018 |  | Atiba Harris | MF |  | Murciélagos FC | Murciélagos |