| 11. Round | 03/11/2020 | Grimsby Town | - | Barrow AFC | 1:0 | ||||
| 13. Round | 21/11/2020 | Tranmere Rovers | - | Grimsby Town | 5:0 | ||||
| 14. Round | 24/11/2020 | Crawley Town | - | Grimsby Town | 1:2 |  |
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| 23. Round | 09/01/2021 | Port Vale FC | - | Grimsby Town | 3:0 |  |
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| 24. Round | 16/01/2021 | Grimsby Town | - | Southend United | 0:0 | ||||
| 25. Round | 23/01/2021 | Scunthorpe United | - | Grimsby Town | 3:0 | |
England