Carlisle have doubts over Des Byrne for the FA Cup second-round tie at Scunthorpe.
The former Wimbledon left-back has been suffering from a back problem since early last month.
On-loan Leon Osman (Everton) and Mark Hudson (Middlesbrough) are cup-tied.
Will McDonagh completes a three-match suspension but fellow defender Darren Kelly is back in contention after a one-game ban.