Purrington is inconsistent but he's young.
Mattock is inconsistent and he's not young. However, he gets forward more effectively than Purrington and is probably the best crosser of a ball at the club.
Warne must have seen something in Purrington because we paid Plymouth a decent fee for him so I hope we persevere and give him a fair crack of the whip.
I'm not sure whether Mattock could play in central defence. He's not particularly tall and I'm not a big fan of experimenting with players in different positions. I rather hope we sign a decent, experienced centre half in January, say a 26/27 year old.