| 1 | Tue 20 Oct 2020 | 141-2 v Harrogate TownGrimsby Town 1-2 Harrogate Town | Sky Bet League Two |
| 2 | Tue 17 Nov 2020 | 140-3 v Hull CityHull City 3-0 Grimsby Town | Papa John’s Trophy Group 10 |
| 3 | Sat 19 Dec 2020 | 14 1-0 v Scunthorpe UnitedGrimsby Town 1-0 Scunthorpe United | Sky Bet League Two |
| 4 | Tue 22 Dec 2020 | 141-2 v Bradford CityGrimsby Town 1-2 Bradford City | Sky Bet League Two |
| 5 | Sat 16 Jan 2021 | 14 0-0 v Southend UnitedGrimsby Town 0-0 Southend United | Sky Bet League Two |
| 6 | Sat 23 Jan 2021 | 140-3 v Scunthorpe UnitedScunthorpe United 3-0 Grimsby Town | Sky Bet League Two |
| 7 | Sat 30 Jan 2021 | 141-2 v StevenageGrimsby Town 1-2 Stevenage | Sky Bet League Two |
| 8 | Sat 20 Mar 2021 | 142-2 v Mansfield TownMansfield Town 2-2 Grimsby Town | Sky Bet League Two |
| 9 | Tue 23 Mar 2021 | 141-0 v BarrowBarrow 0-1 Grimsby Town | Sky Bet League Two |
| 10 | Sat 27 Mar 2021 | 141-1 v WalsallGrimsby Town 1-1 Walsall | Sky Bet League Two |
| 11 | Fri 2 Apr 2021 | 141-1 v Salford CitySalford City 1-1 Grimsby Town | Sky Bet League Two |
| 12 | Sat 10 Apr 2021 | 140-1 v Bradford CityBradford City 1-0 Grimsby Town | Sky Bet League Two |
| 13 | Sat 17 Apr 2021 | 142-1 v Bolton WanderersGrimsby Town 2-1 Bolton Wanderers | Sky Bet League Two |
| 14 | Tue 20 Apr 2021 | 140-3 v MorecambeGrimsby Town 0-3 Morecambe | Sky Bet League Two |
| 15 | Sat 24 Apr 2021 | 142-1 v Oldham AthleticOldham Athletic 1-2 Grimsby Town | Sky Bet League Two |
| 16 | Tue 27 Apr 2021 | 142-3 v Exeter CityExeter City 3-2 Grimsby Town | Sky Bet League Two |
| 17 | Sat 1 May 2021 | 141-0 v Port ValeGrimsby Town 1-0 Port Vale | Sky Bet League Two |
| 18 | Sat 8 May 2021 | 140-3 v Cambridge UnitedCambridge United 3-0 Grimsby Town | Sky Bet League Two |