| 42. Round | 17/04/2021 | Grimsby Town | - | Bolton Wanderers | 2:1 |  |
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| 43. Round | 20/04/2021 | Grimsby Town | - | Morecambe FC | 0:3 | ||||
| 44. Round | 24/04/2021 | Oldham Athletic | - | Grimsby Town | 1:2 | |
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| 30. Round | 27/04/2021 | Exeter City | - | Grimsby Town | 3:2 | ||||
| 45. Round | 01/05/2021 | Grimsby Town | - | Port Vale FC | 1:0 | ||||
| 46. Round | 08/05/2021 | Cambridge United | - | Grimsby Town | 3:0 |
England