| Yellow | Clubs | VS Club | Date | |
|---|---|---|---|---|
| 6 | Shrewsbury Town | Portsmouth | 12-09-2020 | Match details |
| 5 | Oxford United | Swindon Town | 28-11-2020 | Match details |
| 5 | Charlton Athletic | Burton Albion | 24-11-2020 | Match details |
| 5 | Swindon Town | Lincoln City | 24-11-2020 | Match details |
| 5 | Gillingham | Fleetwood Town | 24-10-2020 | Match details |
| 5 | Northampton Town | Bristol Rovers | 03-10-2020 | Match details |
| 5 | Hull City | Crewe Alexandra | 19-09-2020 | Match details |
| 5 | Milton Keynes Dons | Lincoln City | 19-09-2020 | Match details |
| 4 | Charlton Athletic | Rochdale | 12-01-2021 | Match details |
| 4 | Lincoln City | Peterborough United | 09-01-2021 | Match details |
