| P | # | Player | Born | Height | Weight | Contract | |
|---|---|---|---|---|---|---|---|
| GK | Nick Colgan | 1973-09-19 | 185 | 85 | |||
| D | Joe Widdowson | 1989-03-29 | 183 | 76 | |||
| D | Ryan Bennett | 1990-03-06 | 181 | 78 | 2017-06-30 | ||
| M | Josh Magennis | 1990-08-15 | 188 | 92 | 2017-06-30 | ||
| F | John-Louis Akpa Akpro | 1985-01-04 | 182 | 69 | 2012 |
| Date | Player | From | To | Status | Src |
|---|---|---|---|---|---|
| 9.Mar | Moses Ogbu (F) | Grimsby Town | Mjällby AIF | Confirmed | |
| 8.Jan | Sebastian Ring (D) | Grimsby Town | Kalmar FF | Confirmed | |
| 8.Jan | Ludvig Öhman Silwerfeldt (D) | IF Brommapojkarna | Grimsby Town | Confirmed | |
| 28.Dec | Sebastian Ring (D) | Örebro SK | Grimsby Town | Confirmed | |
| 23.Nov | Robert Eagle (M) | Grimsby Town | Alfreton Town | Confirmed | |
| 28.Sep | Andrew Wright (M) | Scunthorpe United | Grimsby Town | Confirmed | |
| 23.Sep | Danny Carlton (F) | Bury FC | Grimsby Town | Confirmed | |
| 31.Aug | Richard O'Donnell (GK) | Sheffield Wednesday | Grimsby Town | Confirmed | |
| 31.Aug | Nick Hegarty (M) | Grimsby Town | St Mirren | Confirmed | |
| 1.Aug | Matt Heywood (D) | Grimsby Town | Barrow | Confirmed |