Nebraska: Freshman I-back Rex Burkhead, who was impressive early and has kept getting better. With Quentin Castille being kicked off the team, Burkhead now is the No. 2 I-back on the roster behind starter Roy Helu Jr.

http://espn.go.com/blog/ncfnation/post/_/id/5522/watch-for-these-freshmen-across-the-big-12