Abdoulaye Faye is unlikely to be fit for the visit of Liverpool to St James's Park on November 24, with the defending facing up to three weeks.
And the game could see Steven Taylor drafted into the centre of defence. Although I'm sure Cacapa could have something to say about that.
So who will start at right-back?
Carr has been out since the Tyne-Tees derby against Middlesbrough at the Riverside Stadium back in August with a hamstring problem.
So who will start at right-back?
Carr has been out since the Tyne-Tees derby against Middlesbrough at the Riverside Stadium back in August with a hamstring problem.
Since then Allardyce has signed right-back Habib Beye, though Steven Taylor has started Newcastle's last two games in that position.
And Allardyce hopes to play injury-plagued Carr - now in his fourth season at St James's Park - in a specially-arranged behind-closed-doors fixture this week.
Asked if Carr would return for the Liverpool fixture, Allardyce said: "Stephen Carr will play in a training game in midweek, to help us get him back.
"We're down to the bare bones. Shola Ameobi went down ill before the Sunderland game, and obviously Butty was suspended."