| 1. Journée | 12.09.2020 | Walsall FC | - | Grimsby Town | 1:0 | ||||
| 2. Journée | 19.09.2020 | Grimsby Town | - | Salford City | 0:4 | ||||
| 5. Journée | 10.10.2020 | Bolton Wanderers | - | Grimsby Town | 0:0 | ||||
| 6. Journée | 17.10.2020 | Leyton Orient | - | Grimsby Town | 2:3 | ||||
| 8. Journée | 24.10.2020 | Grimsby Town | - | Carlisle United | 1:1 |  |
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| 9. Journée | 27.10.2020 | Forest Green Rovers | - | Grimsby Town | 1:0 | |
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| 10. Journée | 31.10.2020 | Stevenage FC | - | Grimsby Town | 0:0 | |
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| 11. Journée | 03.11.2020 | Grimsby Town | - | Barrow AFC | 1:0 | ||||
| 13. Journée | 21.11.2020 | Tranmere Rovers | - | Grimsby Town | 5:0 | ||||
| 15. Journée | 01.12.2020 | Grimsby Town | - | Exeter City | 1:4 | ||||
| 16. Journée | 05.12.2020 | Colchester United | - | Grimsby Town | 2:1 | ||||
| 12. Journée | 08.12.2020 | Grimsby Town | - | Newport County | 0:2 | |
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| 17. Journée | 12.12.2020 | Grimsby Town | - | Mansfield Town | 1:1 |
Écosse