Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2018 |  | Pa Konaté | DF |  | SPAL 2013 Ferrara | SPAL |
| 07/2018 |  | Fatai Alashe | MF |  | San Jose Earthquakes | Earthquakes |
| 07/2018 |  | Fanendo Adi | FW |  | Portland Timbers | Portland |
| 04/2018 |  | Michael Lahoud | MF | |||
| 02/2018 |  | Tomi Ameobi | FW | |||
| 02/2018 |  | Richie Ryan | MF | |||
| 02/2018 | | Blake Smith | DF | |||
| 01/2018 |  | Nathmi Al Badawi | MF | |||
| 01/2018 | | Nazmi Al Badawi | MF |  | North Carolina FC | N. Carolina |
| 01/2018 | | Evan Newton | GK | |||
| 01/2018 |  | Emmanuel Ledesma | MF | |||
| 01/2018 |  | Emery Welshman | FW | |||
| 01/2018 | | Spencer Richey | GK |  | Vancouver Whitecaps | Vancouver |
| 01/2018 |  | Mark Village | GK |  | Vancouver Whitecaps 2 | Vancouver Whitecaps 2 |
| 01/2018 | | Paddy Barrett | DF |  | Dundalk FC | Dundalk |
| 01/2018 |  | Dekel Keinan | DF |  | Maccabi Haifa | M. Haifa |
| 01/2018 | | Forrest Lasso | DF |  | Charleston Battery | Charleston Battery |
| 01/2018 | | Tyler Gibson | MF |  | San Francisco Deltas | SF Deltas |
| 01/2018 |  | Lance Laing | MF | | North Carolina FC | N. Carolina |
| 01/2018 | | Russell Cicerone | FW | | Portland Timbers | Portland |
| 01/2018 | | Daniel Haber | FW |  | Real Salt Lake | Salt Lake |
| 01/2018 | | Tommy Heinemann | FW | | San Francisco Deltas | SF Deltas |
| 01/2018 | | Aaron Powell | AT-C |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2018 | | Lance Laing | MF |  | San Antonio FC | San Antonio FC |
| 07/2018 | | Daniel Haber | FW |  | Ottawa Fury | Ottawa Fury |
| 01/2018 | | Mitch Hildebrandt | GK |  | Atlanta United FC | Atlanta United |
| 01/2018 |  | Dallas Jaye | GK |  | Phoenix Rising | Phoenix |
| 01/2018 |  | Harrison Delbridge | DF |  | Melbourne City FC | Melbourne City |
| 01/2018 | | Pat McMahon | DF |  | Louisville City FC | LouCity |
| 01/2018 | | Kadeem Dacres | MF |  | Saint Louis FC | Saint Louis FC |
| 01/2018 | | Aodhan Quinn | MF |  | Orange County SC | Orange County |