Clark's first full season as first choice centre half which he was playing behind an in experienced midfield and at times playing in a ridiculous 3 at the back formation.
At the moment Baker does look at the better centre back prospect, but Clark still has time on his side so would be good to get him on a new contract.
On another note, it amazes me how many people on here think Cahill is such a fantastic defender. Nearly every time I've seen him play for Bolton, Cheslea and England I've though he was average at best, and that's been generous.