The injury did not look good as Peterson was in pain for a couple minutes before being taken to the locker room.
Gerhart has shown some flashes this season and the Vikings have even gone to him in some late-game situations. He has a ridiculous 9.2 yards per carry on the season with his 21 carries yielding 194 yards. The Vikings have also used him in the passing game a bit with 13 catches on 18 targets for 88 yards. He does only have one score on all those touches, but that's not a surprise with Peterson around.
Fantasy impact: Obviously, Gerhart will be the hottest pickup in all of fantasy football. The Vikings do get a tougher matchup against an improving Philadelphia rushing defense, but as long as he gets his 20 carries, he'd be a must-start player. Peterson not returning is not a good sign, particularly considering the Vikings have nothing left to play for except a better draft pick.