| 1 | Sat 9 Jan 2021 | 360-3 v Port ValePort Vale 3-0 Grimsby Town | Sky Bet League Two |
| 2 | Sat 16 Jan 2021 | 36 0-0 v Southend UnitedGrimsby Town 0-0 Southend United | Sky Bet League Two |
| 3 | Sat 23 Jan 2021 | 360-3 v Scunthorpe UnitedScunthorpe United 3-0 Grimsby Town | Sky Bet League Two |
| 4 | Sat 30 Jan 2021 | 361-2 v StevenageGrimsby Town 1-2 Stevenage | Sky Bet League Two |
| 5 | Sat 6 Mar 2021 | 361-2 v Forest Green RoversGrimsby Town 1-2 Forest Green Rovers | Sky Bet League Two |
| 6 | Tue 9 Mar 2021 | 361-1 v Carlisle UnitedCarlisle United 1-1 Grimsby Town | Sky Bet League Two |
| 7 | Fri 2 Apr 2021 | 361-1 v Salford CitySalford City 1-1 Grimsby Town | Sky Bet League Two |
| 8 | Mon 5 Apr 2021 | 361-1 v Cheltenham TownGrimsby Town 1-1 Cheltenham Town | Sky Bet League Two |
| 9 | Sat 10 Apr 2021 | 36 0-1 v Bradford CityBradford City 1-0 Grimsby Town | Sky Bet League Two |
| 10 | Sat 17 Apr 2021 | 362-1 v Bolton WanderersGrimsby Town 2-1 Bolton Wanderers | Sky Bet League Two |
| 11 | Tue 20 Apr 2021 | 360-3 v MorecambeGrimsby Town 0-3 Morecambe | Sky Bet League Two |
| 12 | Tue 27 Apr 2021 | 362-3 v Exeter CityExeter City 3-2 Grimsby Town | Sky Bet League Two |
| 13 | Sat 1 May 2021 | 361-0 v Port ValeGrimsby Town 1-0 Port Vale | Sky Bet League Two |
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