It's not so much the RB's as it is the offensive line. I posted this in a similar thread but will repost for no reason whatsoever, unless others aren't looking at all the Wynn posts. Here's what Leroy Butler, ex-Packer had to say about him. I think he knows a little about defending against RB's:
Q: Who do you think should be starting at running back?
A: I relate the running back situation to basketball, you give the ball to the hot guy. And right now the hot guy is DeShawn Wynn. Now, I think it's his job until (Vernand) Morency can prove he can run the ball 15 to 20 times without injury. But DeShawn Wynn is a bigger guy so he can carry the load. And I'd love to see "25" (Ryan Grant) some more. I'd like to see him a little bit more on third downs and I'd love to see him on misdirection plays. He does look a little like Dorsey Levens. Dorsey was tough to bring down and Grant showed that on the screen pass. He's a positive runner and that's why I'd like to see more of him. He's got a chance to be very good. But I'm very high on DeShawn Wynn, not because he scored, but if you look at all his positive plays, the touchdown runs, he shows a lot of vision and has very good feet to avoid open-field tacklers. He made a veteran move on that long touchdown. I have all the confidence that Edgar Bennett will put the best guy out there and the hottest guy. I call it the Michael Redd syndrome. Get it to him until he misses.