With Chris Morgan picking up a knee injury, it could see him miss the remainder of the season which leaves the Blades with two recognised centre-backs, but for the FA Cup it leaves them with only one allowed centre-back (Matt Kilgallon) with Leigh Bromby cup-tied.
Manager Kevin Blackwell confirmed the situation: "If the injury is as bad as we think, it could be a long one and I will have to try and look for a centre half."