The Scottish winger, who has been an ever-present for The Owls this campaign and being one of the club's most consistent players.
But he injured his back in the first few minutes of the Bradford game and was unable to run it off - forcing Paul Sturrock to substitute him at half time.
With Matt Hamshaw still out, an there is no obvious replacement although Joey O'Brien did play wide right for the latter part of the second half against The Bantams to enable Craig Rocastle to make his debut.
Chris Brunt could come in for a long-awaited start, but most likely Rocastle will come in for his first start in a blue and white shirt.