With two defenders suspended, that would be the part of the team that Ferguson would be likely to change.
Blackpool are struggling at left back, since allowing Bob Harris to leave the club in the January transfer window and have used the emergency loan system to bring in a right back rather than a left back.
Cathcart has previously played at Left Backk out of position for Northern Ireland in 2010, putting in a stong performance in the 1-0 win over Slovenia.
Possible Line Up:
Foley, MacKenzie, Broadfoot, Cathcart
Angel, Haroun, Perkins
Davies, Keogh, Dobbie
What would your line up be for Saturday?