Luke James and Joao Gomes are aiming for February return dates from their respective injuries.
James has undergone surgery on a broken index finger which he sustained in the game against Blyth Spartans on Boxing Day. He is expected to return to action in four to five weeks, once pins inserted during the operation have been removed.
Gomes is recovering from knee surgery, and the club is targeting a mid-February training return date for the forward.
Dillon Morse has been out since the Boxing Day fixture with a quad injury, and Mariners head of physiotherapy and medical Andrew Morris is aiming to have him back with the squad by the end of next week.
Myles Boney and John Lufudu are expected to be back in contention for the match against Alfreton Town on Saturday, January 20th.
Boney missed out on Tuesday's win at Bishop's Stortford with a neck injury, while illness has kept Lufudu out of the last two games.