| 3. Round | 03/05/2012 | Seattle Sounders | - | Los Angeles Galaxy | 2:0 | ||||
| 3. Round | 05/05/2012 | Seattle Sounders | - | Philadelphia Union | 1:0 | ||||
| 3. Round | 10/05/2012 | FC Dallas | - | Seattle Sounders | 0:2 | ||||
| 3. Round | 13/05/2012 | Seattle Sounders | - | Real Salt Lake | 0:1 | ||||
| 3. Round | 19/05/2012 | Vancouver Whitecaps | - | Seattle Sounders | 2:2 | ||||
| 3. Round | 24/05/2012 | Seattle Sounders | - | Columbus Crew | 0:2 | ||||
| 3. Round | 27/05/2012 | CD Chivas | - | Seattle Sounders | 1:1 | ||||
| 4. Round | 17/06/2012 | Impact de Montréal | - | Seattle Sounders | 4:1 | ||||
| 4. Round | 01/07/2012 | New England Revolution | - | Seattle Sounders | 2:2 | ||||
| 5. Round | 05/07/2012 | Real Salt Lake | - | Seattle Sounders | 0:0 | ||||
| 5. Round | 08/07/2012 | Seattle Sounders | - | Colorado Rapids | 2:1 | ||||
| 5. Round | 15/07/2012 | New York RB | - | Seattle Sounders | 2:2 |
USA