Nebraska running back Rex Burkhead runs off the field after their 13-7 victory over Iowa in an NCAA college football game, Friday, Nov. 23, 2012, in Iowa City, Iowa. (AP Photo/Charlie Neibergall)

Associated Press
Nebraska running back Rex Burkhead runs off the field after their 13-7 victory over Iowa in an NCAA college football game, Friday, Nov. 23, 2012, in Iowa City, Iowa. (AP Photo/Charlie Neibergall)
Nebraska running back Rex Burkhead runs off the field after their 13-7 victory over Iowa in an NCAA college football game, Friday, Nov. 23, 2012, in Iowa City, Iowa. (AP Photo/Charlie Neibergall)
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