Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 09/2009 |  | Heath Pearce | DF |  | Hansa Rostock | Rostock |
| 09/2009 | | Ugo Ihemelu | DF |  | Colorado Rapids | Colorado Rapids |
| 09/2009 |  | Marvin Chávez | MF |  | CD Marathón | CD Marathón |
| 09/2009 |  | Bryan Leyva | MF |  | FC Dallas U19 | U19 |
| 07/2009 |  | Jair Benítez | DF |  | Independiente Medellín | Medellín |
| 07/2009 |  | Atiba Harris | MF |  | CD Chivas | Chivas USA |
| 07/2009 | | Daniel Hernández | DF |  | Club Necaxa | Necaxa |
| 04/2009 |  | Álvaro Sánchez | MF |  | AD San Carlos | San Carlos |
| 01/2009 | | Kyle Davies | DF | |||
| 01/2009 | | George John | DF | |||
| 01/2009 | | Steven Purdy | DF | |||
| 01/2009 | | Daniel Torres | DF |  | Bryne FK | Bryne FK |
| 01/2009 | | David Ferreira | MF |  | Athletico Paranaense | Athletico - PR |
| 01/2009 |  | Dave van den Bergh | MF |  | New York RB | New York RB |
| 01/2009 |  | Sean Bucknor | FW | |||
| 01/2009 | | Peri Marosevic | FW | |||
| 01/2009 | | John Ellinger | AS-CO |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2009 | | Drew Moor | DF | | Colorado Rapids | Colorado Rapids |
| 08/2009 | | Kenny Cooper | FW |  | 1860 Munich | 1860 Munich |
| 07/2009 |  | Marcelo Saragosa | MF | | CD Chivas | Chivas USA |
| 04/2009 | | Aaron Pitchkolan | DF |  | San Jose Earthquakes | Earthquakes |
| 01/2009 |  | Dominic Oduro | FW | | New York RB | New York RB |
| 01/2009 | | Duilio Davino | DF |  | Puebla FC | Puebla |
| 01/2009 |  | Adrian Serioux | DF |  | Toronto FC | Toronto FC |
| 01/2009 | | Ricardinho | FW | | Athletico Paranaense | Athletico - PR |