LANDOVER, MD. (AP) - Minnesota Vikings running back Adrian Peterson injured his left knee, and Christian Ponder suffered a concussion on back-to-back plays Saturday against the Washington Redskins.
Peterson took a direct hit to the knee from Redskins safety DeJon Gomes on a 3-yard gain on the first offensive play of the second half.
Peterson lay on the ground for a couple of minutes and did not put any weight on his left leg as he was helped off the field. He was later taken on a cart to the Vikings locker room.
On the next play, Ponder was sacked by Adam Carriker and London Fletcher. Ponder remained in the game for one more play _ a third-down incomplete pass _ before heading to the locker room.
The Vikings said neither player would return.
Peterson had 12 carries for 38 yards when he left the game. He also had a 1-yard touchdown run in the second quarter.
Ponder had completed 8 of 13 passes for 68 yards. He was replaced by Joe Webb, who scored on a 9-yard run on the next series to give the Vikings the lead.