MINNEAPOLIS -- Dalvin Cook walked off the field and headed to the Minnesota Vikings' locker room with a noticeable limp in his step and a look of frustration on his face.
The rookie running back suffered a non-contact knee injury early in the third quarter Sunday against the Detroit Lions. He took a carry up the middle for 10 yards, and upon cutting to his right to avoid Lions safety Tavon Wilson he reached for his left knee and fumbled the ball.
Cook was tended to on the field by athletic trainers and ruled out for the remainder of the Vikings' eventual 14-7 loss to the Lions within minutes of disappearing into the locker room.