Ajouts
| De | Nom | Pos | Équipe | Équipe | ||
|---|---|---|---|---|---|---|
| 12/2012 |  | José Sánchez | E | |||
| 08/2012 |  | Shalrie Joseph | M |  | New England Revolution | New Engl. |
| 07/2012 |  | Bobby Burling | D | |||
| 07/2012 | | Tristan Bowen | A |  | KSV Roeselare | Roeselare |
| 05/2012 | | Danny Califf | D |  | Philadelphia Union | Philadelphia |
| 05/2012 | | Juan Agudelo | A |  | New York RB | New York RB |
| 04/2012 |  | José Correa | A |  | Boyacá Chicó | Boyacá Chicó |
| 04/2012 |  | Paolo Cardozo | M |  | Los Angeles Galaxy | L.A. Galaxy |
| 04/2012 | | Mark Delgado | M | |||
| 03/2012 | | Patrick McLain | G | |||
| 02/2012 | | César Romero | A | |||
| 01/2012 | | Tim Melia | G | |||
| 01/2012 | | Casey Townsend | A | |||
| 01/2012 | | Scott Gordon | D |  | Fort Lauderdale Strikers | Ft. Lauderdale |
| 01/2012 | | Rauwshan McKenzie | D |  | Real Salt Lake | Salt Lake |
| 01/2012 | | James Riley | D |  | Seattle Sounders | Seattle SFC |
| 01/2012 | | John Valencia | D |  | Atlético Junior | Atlético Junior |
| 01/2012 | | Jorge Villafaña | D | |||
| 01/2012 |  | Miler Bolaños | M |  | LDU Quito | LDU Quito |
| 01/2012 |  | Marvin Iraheta | M | |||
| 01/2012 | | Oswaldo Minda | M |  | Deportivo Quito | SD Quito |
| 01/2012 |  | Ryan Smith | M |  | Sporting Kansas City | Kansas City |
| 01/2012 | | Peter Vagenas | M |  | Vancouver Whitecaps | Vancouver |
Aliénations
| De | Nom | Pos | Équipe | Équipe | ||
|---|---|---|---|---|---|---|
| 08/2012 | | Blair Gavin | M | | New England Revolution | New Engl. |
| 05/2012 | | Heath Pearce | D | | New York RB | New York RB |
| 05/2012 |  | Michael Lahoud | M | | Philadelphia Union | Philadelphia |
| 01/2012 |  | Seth Owusu | D |  | Medeama SC | Medeama |
| 01/2012 |  | Michael Umaña | D |  | Comunicaciones | Comunicaciones |
| 01/2012 |  | Zarek Valentin | D |  | CF Montréal | Montréal |
| 01/2012 | | Bryan de la Fuente | M |  | Club Tijuana | Club Tijuana |
| 01/2012 | | Francisco Mendoza | M |  | Santos de Guápiles | Santos |
| 01/2012 |  | Paulo Nagamura | M | | Sporting Kansas City | Kansas City |
| 01/2012 | | Mariano Trujillo | M |  | Gallos Blancos | Querétaro |
| 01/2012 | | Justin Braun | A | | CF Montréal | Montréal |
| 01/2012 | | Jesús Padilla | A |  | CD Veracruz | CD Veracruz |