| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 5 | Columbus Crew | 07-06-2008 | League Section | Match details |
| 4 | Real Salt Lake | 18-06-2008 | League Section | Match details |
| 3 | Chivas USA | 23-08-2008 | League Section | Match details |
| 3 | New England Revolution | 16-08-2008 | League Section | Match details |
| 3 | Colorado Rapids | 12-07-2008 | League Section | Match details |
| 3 | Chicago Fire | 28-06-2008 | League Section | Match details |
| 3 | Los Angeles Galaxy | 14-06-2008 | League Section | Match details |
| 3 | New England Revolution | 17-05-2008 | League Section | Match details |
