| Yellow | VS Club | Date | Sections | |
|---|---|---|---|---|
| 5 | Sporting Kansas City | 23-08-2008 | League Section | Match details |
| 4 | Chicago Fire | 15-06-2008 | League Section | Match details |
| 4 | New England Revolution | 06-06-2008 | League Section | Match details |
| 3 | Colorado Rapids | 19-07-2008 | League Section | Match details |
| 3 | Houston Dynamo | 26-06-2008 | League Section | Match details |
| 3 | Los Angeles Galaxy | 18-05-2008 | League Section | Match details |
