Midfielder Steve Hayward (hamstring) is Gudjon's only injury doubt for the visit of the Mariners.
However Dean Gorre, Rory Fallon and Neil Austin could all be in contention for a starting place if the Reds decide to go for a more attacking line-up.
Grimsby have signed Iffy Onuora from the Blades until the end of the season while former Reds defender Darren Barnard returns to Oakwell.