| Yellow | VS Club | Date | |
|---|---|---|---|
| 5 | Columbus Crew | 22-04-2018 | Match details |
| 4 | Montreal Impact | 29-10-2018 | Match details |
| 4 | Atlanta United | 07-10-2018 | Match details |
| 4 | Chicago Fire | 23-09-2018 | Match details |
| 4 | Portland Timbers | 02-09-2018 | Match details |
| 4 | DC United | 20-08-2018 | Match details |
| 4 | Columbus Crew | 20-05-2018 | Match details |
| 4 | Toronto FC | 13-05-2018 | Match details |
