Nebraska QB Tommy Armstrong carted off fieldNebraska QB Tommy Armstrong was carted off the field after hitting his head on the ground on a rushing attempt.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceNebraska QB Tommy Armstrong was carted off the field after hitting his head on the ground on a rushing attempt.Loading recommendations... Please wait while we load personalized content recommendationsPublished Nov 6, 2016 | Modified Nov 6, 2016SI STAFFShare on FacebookShare on XHome/College