The pair were excused from Republic of Ireland duty in midweek, with niggles to their shoulder and hamstring respectively. They returned to Bramall Lane for treatment as a much-changed Irish squad, captained by their United teammate John Egan, beat Bulgaria 3-1 at the Aviva.
And, speaking at his pre-match press conference this morning, Wilder said: “A couple of the Irish boys came back early but I believe Mick [McCarthy, Ireland boss] was going to change the team around on Tuesday anyway.
“That gave Callum and Dave the chance to come back and have treatment with us. We’ll give them every chance of being fit for Saturday.”
John Fleck will also be given every opportunity to prove his fitness after his own recent injury.