Adrian Peterson ruled out for Week 12

Vikings RB Adrian Peterson (ankle) has officially been ruled out for Sunday's game against the Falcons.  He tried to get on the field Friday but wasn't close to being ready.  "When he got up on his toes to plant or make a cut, that's where he had trouble," HC Leslie Frazier said.  The team is still optimistic that AP will be ready for Week 13, but we'd consider him questionable at best.  RB Toby Gerhart will start against Atlanta this weekend.