League One 2020-21 Discipline
Red cards
Yellow cards
| Team | Cards |
| Charlton | 99 |
| Northampton | 94 |
| MK Dons | 81 |
| Shrewsbury | 81 |
| Burton Albion | 79 |
| Ipswich | 78 |
| Lincoln | 78 |
| Portsmouth | 77 |
| Swindon | 77 |
| Fleetwood | 74 |
| Accrington | 73 |
| Plymouth | 73 |
| Oxford Utd | 72 |
| Bristol Rovers | 71 |
| Peterborough | 70 |
| Gillingham | 68 |
| Wigan | 68 |
| Sunderland | 65 |
| Hull City | 64 |
| Rochdale | 62 |
| AFC Wimbledon | 60 |
| Doncaster | 60 |
| Crewe | 54 |
| Blackpool | 53 |
