Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2008 |  | Brian McBride | FW | |||
| 07/2008 |  | Marco Pappa | MF | |||
| 05/2008 | | Austin Washington | DF | |||
| 04/2008 |  | Líder Mármol | DF | |||
| 04/2008 |  | Jökull Elísabetarson | DF |  | Víkingur Reykjavík | Víkingur |
| 03/2008 |  | Andy Herron | FW |  | Puntarenas FC | Puntarenas FC |
| 02/2008 |  | Tomasz Frankowski | FW | |||
| 01/2008 |  | Patrick Nyarko | MF | |||
| 01/2008 | | Brandon Prideaux | DF |  | Colorado Rapids | Colorado Rapids |
| 01/2008 | | Stephen King | MF | |||
| 01/2008 | | Mike Jeffries | AS-CO |  | Duke Blue Devils | Duke Blue Devil |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 11/2008 |  | Cuauhtémoc Blanco | FW |  | Santos Laguna | Santos Laguna |
| 08/2008 | | Chad Barrett | FW |  | Toronto FC | Toronto FC |
| 02/2008 | | Matt Pickens | GK |  | Queens Park Rangers | QPR |
| 01/2008 | | Jeff Curtin | DF |  | D.C. United | DC United |
| 01/2008 | | Jim Curtin | DF |  | CD Chivas | Chivas USA |
| 01/2008 |  | Osei Telesford | DF |  | Puerto Rico Islanders | Islanders |
| 01/2008 |  | Iván Guerrero | MF |  | San Jose Earthquakes | Earthquakes |
| 01/2008 | | David Roth | MF |  | New York RB | New York RB |