| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 4 | New England Revolution | 28-06-2008 | League Section | Match details |
| 3 | Colorado Rapids | 09-08-2008 | League Section | Match details |
| 3 | FC Dallas | 03-08-2008 | League Section | Match details |
| 3 | Chicago Fire | 12-07-2008 | League Section | Match details |
| 3 | Los Angeles Galaxy | 31-05-2008 | League Section | Match details |
| 2 | New York Red Bulls | 17-08-2008 | League Section | Match details |
| 2 | Real Salt Lake | 28-07-2008 | League Section | Match details |
