One of the most impressive rookies to start the seaosn, Minnesota Vikings running back Dalvin Cook suffered a scary injury on Sunday. On a carry up the middle, Cook planted his leg to shift and it immediately buckled, he collapsed to the ground and immediately started grabbing at his knee.

Cook received assistance getting off the field and Minnesota quickly ruled him out for the game. It's a horrible sign for the second-round pick who flashed tremendous ability as Minnesota's workhorse back to start the season. He'll finish Sunday's game with 74 total yards and a touchdown, but of greater concern now for Minnesota fans and fantasy owners is the non-contact knee injury. We'll provide a further update when more information becomes available.