Carlisle will check on Kelvin Etuhu prior to their home game with Luton.
The midfielder has been out since February but returned to training last weekend so could be back in Keith Curle's fold.
Nicky Adams (knee) and Jason Kennedy (pelvis) are long-term absentees who will not play again this season.
The U's are six points off the play-off places with just three games remaining.
Luton will guarantee promotion if they are victorious.
A point would be enough if Exeter fail to beat Crawley, while a Grecians...