| Yellow | Clubs | VS Club | Date | |
|---|---|---|---|---|
| 6 | Plymouth Argyle | Crewe Alexandra | 16-01-2021 | Match details |
| 6 | Shrewsbury Town | Portsmouth | 12-09-2020 | Match details |
| 5 | Milton Keynes Dons | Lincoln City | 13-04-2021 | Match details |
| 5 | Oxford United | Sunderland | 02-04-2021 | Match details |
| 5 | Shrewsbury Town | Hull City | 20-03-2021 | Match details |
| 5 | Accrington Stanley | Milton Keynes Dons | 13-03-2021 | Match details |
| 5 | Northampton Town | Doncaster Rovers | 13-03-2021 | Match details |
| 5 | Charlton Athletic | Blackpool | 27-02-2021 | Match details |
| 5 | Burton Albion | Sunderland | 20-02-2021 | Match details |
| 5 | Doncaster Rovers | Swindon Town | 16-01-2021 | Match details |
