I don't see them taking Thomas, I don't think it's a heavy enough need to spend the money that the 3rd pick covets on a lineman, not for the Browns anyway. And, to me, they can't afford to risk their top pick being injured again, which should scare them off of Peterson. Quinn is the likely choice, and the choice of ownership, but Crennell's been looking hard at Adams, he's been looking at a lot of defensive ends, so it's definately a concern of his. Just gotta wait and see.
Shannahan's been offering 4 picks (first three this year and next year's first) to move up and get Joe Thomas, so if he's available at three, that should be an option for the Browns. I don't see how they could turn that down, but whatever.