Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2010 |  | Freddie Ljungberg | MF |  | Seattle Sounders | Seattle SFC |
| 07/2010 |  | Nery Castillo | MF |  | Dnipro Dnipropetrovsk | Dnipro |
| 07/2010 |  | Bratislav Ristić | MF |  | FK Rad Beograd | FK Rad |
| 04/2010 |  | Aron Hyde | GK-CO | |||
| 01/2010 |  | Sean Johnson | GK | |||
| 01/2010 | | Kwame Watson-Siriboe | DF | |||
| 01/2010 | | Corben Bone | MF | |||
| 01/2010 | | Steven Kinney | DF | |||
| 01/2010 |  | Krzysztof Król | DF |  | Jagiellonia Białystok | Jagiellonia |
| 01/2010 |  | Julio Martínez | MF |  | Club León | Club León |
| 01/2010 | | Deris Umanzor | MF |  | CD Águila | Águila |
| 01/2010 |  | Collins John | FW |  | KSV Roeselare | Roeselare |
| 01/2010 | | Carlos de los Cobos | MA |  | El Salvador | El Salvador |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2010 | | Tim Ward | DF |  | San Jose Earthquakes | Earthquakes |
| 07/2010 | | Justin Mapp | MF |  | Philadelphia Union | Philadelphia |
| 07/2010 | | Julio Martínez | MF |  | Alianza | Alianza |
| 03/2010 | | Jon Busch | GK | | San Jose Earthquakes | Earthquakes |
| 01/2010 | | Daniel Woolard | DF |  | North Carolina FC | N. Carolina |
| 01/2010 | | Cuauhtémoc Blanco | FW |  | Atlético San Luis | San Luis |
| 01/2010 | | Chris Rolfe | FW |  | Aalborg BK | Aalborg BK |
| 01/2010 | | Daryl Shore | GK-CO |  | Fort Lauderdale Strikers | Ft. Lauderdale |