Williams has more to prove than anyone on this list, hands down.
With two back-to-back poor seasons (after suffering a neck injury in 2008), Williams is not only competing in camp for a roster spot, he is competing for a job.
Leslie Frazier hasn’t given up on him, though, but you also get the notion that they are extending their last opportunity:
"[He] provides great leadership for us in the secondary," Frazier said this week at the NFL coaches breakfast in New Orleans. "We’d like for him to get his hands on a few more balls [he had one interception in 2010 and has three in three years with the Vikings], but his leadership is probably the thing that really sticks out—just being able to control our secondary, get guys lined up correctly, understanding the system. That’s probably the biggest asset to what we do, and until we have another guy who we think can supplant him in that role, that’s the way it’ll probably be."—Minneapolis Star-Tribune
Williams has Tyrell Johnson breathing down his neck, and if Johnson beats him out in camp, the Vikings are more than likely not going to keep Williams and his hefty $5.4 million liability salary.
It’s now or never for Williams.