http://www.dallascowboys.com/news/a...Returner/404a871f-16d4-4268-a74b-99fa56ef06d1 ...We all know who the top four corners are as of right now, but will the Cowboys keep a fifth, and who might it be? Nick: That’s an interesting situation as well. I thought one of the rookies like Lionel Smith or Isaac Madison would have that spot. Madison has been cut and Smith hasn’t stood out that much. I think the answer to your question is Mario Butler. He spent last year on the practice squad and so far, they’ve tried him some at safety. That tells me they’re looking for someone to be a versatile player that could be valuable on game days. Teddy Williams isn’t too far behind but my pick would be Butler. Josh: I think they will. My best guess is Mario Butler, because he can double as a safety. But it’s an open competition, and could change in one preseason game.