| Yellow | VS Club | Date | |
|---|---|---|---|
| 6 | Scunthorpe United | 31-08-2019 | Match details |
| 5 | Cambridge United | 29-02-2020 | Match details |
| 4 | Bradford City | 21-09-2019 | Match details |
| 4 | Forest Green Rovers | 17-09-2019 | Match details |
| 3 | Morecambe | 22-02-2020 | Match details |
| 3 | Crawley Town | 15-02-2020 | Match details |
| 3 | Forest Green Rovers | 28-01-2020 | Match details |
| 3 | Walsall | 25-01-2020 | Match details |
