| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 7 | Chicago Fire | 16-08-2008 | League Section | Match details |
| 6 | Chicago Fire | 07-06-2008 | League Section | Match details |
| 4 | New York Red Bulls | 10-08-2008 | League Section | Match details |
| 4 | Houston Dynamo | 23-07-2008 | League Section | Match details |
| 4 | Chivas USA | 17-05-2008 | League Section | Match details |
| 3 | New England Revolution | 20-08-2008 | League Section | Match details |
| 3 | New York Red Bulls | 14-06-2008 | League Section | Match details |
