Adrian Peterson missed practice on Wednesday with a neck injury, and coach Bruce Arians is unsure how his running back rotation will shape up for Sunday’s contest against the Rams.
Peterson had 20 carries for 79 yards in last week’s win over the Jaguars but was hurt in the game. He has been the Cardinals’ primary ball-carrier since being acquired in a midseason trade from the Saints, averaging 21.5 carries per contest.
The Cardinals’ backup running back, Kerwynn Williams, suffered cracked ribs against Jacksonville. Arians said Monday it was a pain threshold issue and thought Williams would miss some time, but he practiced Wednesday.