Minnesota Vikings running backs Dalvin Cook (shoulder) and Alexander Mattison (ankle) are both out of practice again on Friday. Mattison is working on the side with a strength coach. Both players are on track to sit out on Monday night against the Packers, so you shouldn't plan on having either back for the fantasy finals. That's a tough pill to swallow, as Cook has been one of the best running backs in fantasy all season. Mike Boone, who had two touchdowns against the Chargers last week, ...