| 1 | Sat 5 Sep 2020 | 201-1 v MorecambeGrimsby Town 1-1 Morecambe | Carabao Cup First Round North |
| 2 | Sat 19 Sep 2020 | 200-4 v Salford CityGrimsby Town 0-4 Salford City | Sky Bet League Two |
| 3 | Sat 10 Oct 2020 | 200-0 v Bolton WanderersBolton Wanderers 0-0 Grimsby Town | Sky Bet League Two |
| 4 | Tue 13 Oct 2020 | 203-1 v Cheltenham TownCheltenham Town 1-3 Grimsby Town | Sky Bet League Two |
| 5 | Sat 17 Oct 2020 | 203-2 v Leyton OrientLeyton Orient 2-3 Grimsby Town | Sky Bet League Two |
| 6 | Tue 20 Oct 2020 | 201-2 v Harrogate TownGrimsby Town 1-2 Harrogate Town | Sky Bet League Two |
| 7 | Tue 17 Nov 2020 | 20 0-3 v Hull CityHull City 3-0 Grimsby Town | Papa John’s Trophy Group 10 |
| 8 | Sat 21 Nov 2020 | 200-5 v Tranmere RoversTranmere Rovers 5-0 Grimsby Town | Sky Bet League Two |
| 9 | Tue 24 Nov 2020 | 202-1 v Crawley TownCrawley Town 1-2 Grimsby Town | Sky Bet League Two |
| 10 | Tue 1 Dec 2020 | 201-4 v Exeter CityGrimsby Town 1-4 Exeter City | Sky Bet League Two |
| 11 | Sat 5 Dec 2020 | 201-2 v Colchester UnitedColchester United 2-1 Grimsby Town | Sky Bet League Two |
| 12 | Tue 8 Dec 2020 | 200-2 v Newport CountyGrimsby Town 0-2 Newport County | Sky Bet League Two |
| 13 | Sat 12 Dec 2020 | 201-1 v Mansfield TownGrimsby Town 1-1 Mansfield Town | Sky Bet League Two |
| 14 | Tue 15 Dec 2020 | 201-3 v Southend UnitedSouthend United 3-1 Grimsby Town | Sky Bet League Two |
| 15 | Sat 19 Dec 2020 | 201-0 v Scunthorpe UnitedGrimsby Town 1-0 Scunthorpe United | Sky Bet League Two |
| 16 | Tue 22 Dec 2020 | 201-2 v Bradford CityGrimsby Town 1-2 Bradford City | Sky Bet League Two |
| 17 | Sat 26 Dec 2020 | 201-3 v MorecambeMorecambe 3-1 Grimsby Town | Sky Bet League Two |
| 18 | Tue 29 Dec 2020 | 200-0 v Oldham AthleticGrimsby Town 0-0 Oldham Athletic | Sky Bet League Two |
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