Sunderland's injury crisis has worsened after it was confirmed Russell Anderson will miss the next three months following ankle surgery.
Anderson has made just two appearances since joining the Black Cats in a £1million deal from Aberdeen during the summer.
The 28-year-old central defender ruptured his ankle ligaments in a Carling Cup game at Luton last month and was told surgery was the only course of action.
The Scotland international will now join Andy Cole (calf), Dean Whitehead (knee), Kieran Richardson (back), Carlos Edwards (hamstring) and Stanislav Varga (knee) on the Stadium of Light treatment table.
"Russell has had an operation to reconstruct his ankle ligaments and will be out for a while," confirmed Black Cats boss Roy Keane.
Meanwhile, Keane also revealed that he doesn't expect Cole to be fit until after next month's international break.
The veteran striker has yet to make an appearances for the Wearsiders since joining them on a free transfer last month.