Minnesota Vikings running back Adrian Peterson was carted to the locker room after injuring an ankle in the second quarter of Sunday's game against the Baltimore Ravens.
FOX reported on the game broadcast that Peterson was taken off-site for an immediate MRI, an ominous sign. The Vikings announced in the third quarter that Peterson's return was doubtful.
He walked on his own from the Vikings' locker room to the X-ray room.
Peterson was injured after getting tackled by Ravens linebacker Arthur Brown on a third-down reception from quarterback Matt Cassel. Clearly in pain, Peterson was helped off the field. He was carted to the locker room after team doctors examined the injured leg on the sideline.
Peterson had 13 yards on seven carries before the injury.