typically Minn substitutes Mattisom in when cook is hurt but Cook is such a dynamic player as bother a runner a a pass catcher that they rely on him when he’s healthy. Mattison is a nice backup but he isn’t the kind of dynamic threat that Cook is. That’s my take on it anyway.Random thought as I was reading about Cook: when a team has two really good RBs like MIN does, why not use them both instead of constantly running Cook into the ground? It's not like Mattison hasn't shown he can be as productive whenever he fills in.