| 1 | Sat 30 Jan 2021 | 401-2 v StevenageGrimsby Town 1-2 Stevenage | Sky Bet League Two |
| 2 | Sat 6 Feb 2021 | 400-1 v Newport CountyNewport County 1-0 Grimsby Town | Sky Bet League Two |
| 3 | Tue 23 Feb 2021 | 402-1 v Crawley TownGrimsby Town 2-1 Crawley Town | Sky Bet League Two |
| 4 | Sat 27 Feb 2021 | 400-1 v Harrogate TownHarrogate Town 1-0 Grimsby Town | Sky Bet League Two |
| 5 | Tue 2 Mar 2021 | 400-1 v Leyton OrientGrimsby Town 0-1 Leyton Orient | Sky Bet League Two |
| 6 | Sat 6 Mar 2021 | 401-2 v Forest Green RoversGrimsby Town 1-2 Forest Green Rovers | Sky Bet League Two |
| 7 | Sat 13 Mar 2021 | 400-0 v Colchester UnitedGrimsby Town 0-0 Colchester United | Sky Bet League Two |
| 8 | Sat 20 Mar 2021 | 402-2 v Mansfield TownMansfield Town 2-2 Grimsby Town | Sky Bet League Two |
| 9 | Tue 23 Mar 2021 | 401-0 v BarrowBarrow 0-1 Grimsby Town | Sky Bet League Two |
| 10 | Sat 27 Mar 2021 | 40 1-1 v WalsallGrimsby Town 1-1 Walsall | Sky Bet League Two |
| 11 | Fri 2 Apr 2021 | 40 1-1 v Salford CitySalford City 1-1 Grimsby Town | Sky Bet League Two |
| 12 | Mon 5 Apr 2021 | 401-1 v Cheltenham TownGrimsby Town 1-1 Cheltenham Town | Sky Bet League Two |
| 13 | Sat 10 Apr 2021 | 40 0-1 v Bradford CityBradford City 1-0 Grimsby Town | Sky Bet League Two |
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