Arizona Cardinals running back Adrian Peterson’s season has come to an end. The running back was placed on IR with a neck injury. But looking ahead to 2018, head coach Bruce Arians seems to be committed to Peterson playing alongside David Johnson. In fact, he seems to think having both the veteran and the youngster will be good for Johnson. Peterson was traded to the Cardinals prior to Week 6 and has done a respectable job as the team’s workhorse. Johnson has been out since Week 1 when he suffered a wrist injury.