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.Loading recommendations... Please wait while we load personalized content recommendationsPublished Jan 1, 2017 | Modified Jan 1, 2017SI STAFFShare on FacebookShare on XHome/NFL