Tony McMahon and Matt Hill (both hamstring) are major doubts for Saturday clash with Stevenage at Bramall Lane.
The duo limped out of the action at MK Dons last week, with David McAllister and Darryl Westlake replacing the duo and it is expected the latter will start at right-back at the weekend. Marcus Williams likely to return to his customary left-back slot.
Dave Kitson (hamstring) is edging closer to a return, but it is expected that Nick Blackman and Chris Porter will continue up front, although Richard Cresswell and John Cofie could come into Wilson's thinking.
For the visitors, Luke Freeman, Patrick Agyemang and Robin Shroot could all be recalled after coming off the bench in Stevenage's 4-1 defeat to Preston North End at the Lamex Stadium.
Meanwhile, striker Michael Thalassitis has joined Bishop's Stortford on a one-month emergency loan deal.