David Johnson carted off with apparent knee injuryCardinals running back David Johnson was carted off the field with an apparent left knee injury during Sunday’s game against the Rams.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceCardinals running back David Johnson was carted off the field with an apparent left knee injury during Sunday’s game against the Rams.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Jan 1, 2017 | Modified Jan 1, 2017SI STAFFShare on FacebookShare on XHome/NFL