| Yellow | VS Club | Date | |
|---|---|---|---|
| 5 | Los Angeles Galaxy | 12-08-2018 | Match details |
| 5 | New England Revolution | 19-07-2018 | Match details |
| 5 | Houston Dynamo | 08-07-2018 | Match details |
| 5 | Los Angeles FC | 10-05-2018 | Match details |
| 4 | New York City | 30-09-2018 | Match details |
| 4 | Portland Timbers | 15-04-2018 | Match details |
| 3 | Toronto FC | 05-07-2018 | Match details |
| 3 | Sporting Kansas City | 04-06-2018 | Match details |
