OK, this needs to be said. I can't believe I didn't notice this until this year, (and it was my brother who actually directed my attention towards it) but Rex is not good in pass protection. Not decent, not average, flat out bad pass protection. There have been a number of plays that have completely blown up because Rex just whiffed on his responsibility. Then we hear Martinez is skittish, horrible in the pocket, ect.
It shocks me, because his game is so well rounded, and he plays so tough running through the tackles, ALWAYS falling forward after contact. The kid's game screams blue-collar. If there was ever an NU running back who I would think would be a solid blocker in pass protect, it would be Rex.
Don't take my word for it. Re-watch yesterdays game, re-watch the Fresno game. You'll be as suprised as I was when I started looking for it. If we're keeping the RB in the backfield, not sending him into the flat for a check-down, then it is VITAL that RB picks up his responsibility so your quarterback has time to let his downfield routes develop. I'm promising you guys, Rex isn't doing it.
I hate saying anything bad about Burkhead, and I'm sure some people might jump on me a little for saying something derogatory about one of all of our favorite players. But I know what I've seen. And consistently missing your responsibility in pass-protect as a RB is a pretty big deal.