| 23. Jornada | 09.01.2021 | Port Vale FC | - | Grimsby Town | 3:0 | ||||
| 24. Jornada | 16.01.2021 | Grimsby Town | - | Southend United | 0:0 |  |
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| 25. Jornada | 23.01.2021 | Scunthorpe United | - | Grimsby Town | 3:0 | ||||
| 27. Jornada | 30.01.2021 | Grimsby Town | - | Stevenage FC | 1:2 | ||||
| 34. Jornada | 06.03.2021 | Grimsby Town | - | Forest Green Rovers | 1:2 | ||||
| 35. Jornada | 09.03.2021 | Carlisle United | - | Grimsby Town | 1:1 | ||||
| 39. Jornada | 02.04.2021 | Salford City | - | Grimsby Town | 1:1 | ||||
| 40. Jornada | 05.04.2021 | Grimsby Town | - | Cheltenham Town | 1:1 | ||||
| 41. Jornada | 10.04.2021 | Bradford City | - | Grimsby Town | 1:0 | |
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| 42. Jornada | 17.04.2021 | Grimsby Town | - | Bolton Wanderers | 2:1 | ||||
| 43. Jornada | 20.04.2021 | Grimsby Town | - | Morecambe FC | 0:3 | ||||
| 30. Jornada | 27.04.2021 | Exeter City | - | Grimsby Town | 3:2 | ||||
| 45. Jornada | 01.05.2021 | Grimsby Town | - | Port Vale FC | 1:0 |
Inglaterra