Cook is planning on attending camp and playing, despite failing to get a new contract. It's a slippery slope for Cook and the Vikings. While clearly one of the league's best runners when healthy, Cook has had his share of injury concerns and has missed eight games the past two seasons. High priced contracts for running backs aren't as common as they used to be and high priced contracts for running backs with injury concerns are even more rare. The Vikings have a very capable running back in Alexander Mattison, so it will be interesting to see this play out. Cook is currently our RB5 and Mattison comes in at RB37. While this is good news for Cook owners, this could also be one of your last chances to buy low on Mattison in dynasty leagues.