Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 12/2017 |  | Jon Kempin | GK |  | Los Angeles Galaxy | L.A. Galaxy |
| 08/2017 |  | Pedro Santos | MF |  | S.C. Braga | S.C. Braga |
| 03/2017 | | Kekuta Manneh | MF |  | Vancouver Whitecaps | Vancouver |
| 02/2017 | | Connor Maloney | DF |  | Pittsburgh Riverhounds | Pittsburgh Riverhounds |
| 02/2017 |  | Artur | MF |  | São Paulo FC | São Paulo FC |
| 01/2017 | | Abuchi Obinwa | MF | |||
| 01/2017 |  | Mohammed Abu | MF | |||
| 01/2017 | | Logan Ketterer | GK |  | Bradley Braves | Bradley |
| 01/2017 | | Lalas Abubakar | DF | | Pittsburgh Riverhounds | Pittsburgh Riverhounds |
| 01/2017 |  | Niko Hansen | MF |  | MLS PC Tango | MLS PC Tango |
| 01/2017 |  | Nico Estévez | AS-CO | |||
| 01/2017 | | Josh Williams | DF | |||
| 01/2017 | | Jonathan Mensah | DF |  | Anzhi Makhachkala | Anzhi |
| 01/2017 | | Alex Crognale | DF |  | Maryland Terrapins | Maryland Terrapins |
| 01/2017 |  | Jukka Raitala | DF |  | Sogndal IL | Sogndal IL |
| 01/2017 | | Chris Shenberger | AT-C | |||
| 01/2017 |  | David Handgraaf | G-AN | |||
| 01/2017 | | Alex Mysiw | G-AN |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2017 |  | Nicolai Næss | DF |  | Sc Heerenveen | Heerenveen |
| 08/2017 | | Ethan Finlay | MF |  | Minnesota United FC | Minnesota Utd |
| 03/2017 |  | Tony Tchani | MF | | Vancouver Whitecaps | Vancouver |
| 03/2017 | | Abuchi Obinwa | MF | | Pittsburgh Riverhounds | Pittsburgh Riverhounds |
| 03/2017 |  | Rodrigo Saravia | MF |  | IK Frej | IK Frej |
| 01/2017 | | Steve Clark | GK |  | AC Horsens | Horsens |
| 01/2017 | | Michael Parkhurst | DF |  | Atlanta United FC | Atlanta United |
| 01/2017 |  | Cedrick Mabwati | MF |  | UCAM Murcia CF | UCAM Murcia |
| 01/2017 |  | Mohammed Saeid | MF | | Minnesota United FC | Minnesota Utd |