This article is part of our Injury Analysis series.
The Vikings running back left Monday's loss to the Seahawks early in the second half and never returned. The injury has been referred to as both an aggravation of a preexisting shoulder injury and as a chest injury. While this may cause of degree of confusion, the description would be accurate if the injury involved the sternoclavicular (SC) joint. The SC joint is formed where the medial end of the clavicle (collarbone) comes in contact with the sternum (breastbone) of the chest. A small cartilage disc in the area allows the collarbone to move within multiple planes, making it an integral part of the shoulder complex. Dislocation of the SC joint can be extremely dangerous and potentially life-threatening as the windpipe and several major blood vessels are located directly behind the area. Kansas City wide receiver Tyreek Hill missed four weeks with a SC dislocation earlier this season. Fortunately, Cook appears to have avoided in injury of this magnitude and downplayed the injury following the game.
Those invested in Cook may want to consider adding Alexander Mattison as an insurance policy just in case the injury lingers. The rookie running back finished Monday's game with four rushes for 22 yards and caught four passes for 51 yards. The Vikings have a favorable matchup in Week 14 against a Lions defense that has given up 118 rushing yards per game.
The Colts continue to manage significant injuries to key contributors. Mack has missed back-to-back