| 1 | Sat 18 Jan 2020 | 0-1 v Exeter CityGrimsby Town 0-1 Exeter City | Sky Bet League Two |
| 2 | Sat 25 Jan 2020 | 2-3 v Crawley TownCrawley Town 3-2 Grimsby Town | Sky Bet League Two |
| 3 | Tue 28 Jan 2020 | 3-1 v StevenageGrimsby Town 3-1 Stevenage | Sky Bet League Two |
| 4 | Sat 1 Feb 2020 | 2-2 v Forest Green RoversGrimsby Town 2-2 Forest Green Rovers | Sky Bet League Two |
| 5 | Sat 8 Feb 2020 | 1-1 v Bradford CityBradford City 1-1 Grimsby Town | Sky Bet League Two |
| 6 | Tue 11 Feb 2020 | 3-2 v Colchester UnitedColchester United 2-3 Grimsby Town | Sky Bet League Two |
| 7 | Sat 15 Feb 2020 | 2-1 v MorecambeGrimsby Town 2-1 Morecambe | Sky Bet League Two |
| 8 | Sat 22 Feb 2020 | 1-3 v Swindon TownSwindon Town 3-1 Grimsby Town | Sky Bet League Two |
| 9 | Tue 25 Feb 2020 | 4-2 v Newport CountyGrimsby Town 4-2 Newport County | Sky Bet League Two |
| 10 | Sat 29 Feb 2020 | 0-3 v Northampton TownGrimsby Town 0-3 Northampton Town | Sky Bet League Two |
| 11 | Tue 3 Mar 2020 | 0-3 v Plymouth ArgylePlymouth Argyle 3-0 Grimsby Town | Sky Bet League Two |
| 12 | Sat 7 Mar 2020 | 2-0 v Scunthorpe UnitedScunthorpe United 0-2 Grimsby Town | Sky Bet League Two |
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