The Scotland international is out for the rest of the season after suffering a double leg break in the FA Cup defeat at Blackburn last Saturday.
Fellow striker Patrick Agyemang has a stress fracture of the leg which will sideline him for three months and midfielder Akos Buzsaky will be out for another four weeks with a knee injury.
Defender Peter Ramage (cruciate) and midfielders Gavin Mahon (hamstring) and Josh Parker (foot) are also missing while winger Hogan Ephraim (knee), midfielder Martin Rowlands (calf) and forward Heidar Helguson (thigh), who all sat out at the weekend, will need late checks.
However, defender Matt Connolly is back from suspension, skipper Adel Taarabt and fellow midfielder Tommy Smith return after being rested on Saturday and wideman Lee Cook (knee) will be on the bench again after a reserve run-out this week.
Source: PA
Source: PA