Is Adrian Peterson on his way back? The Vikings All-Pro running back was seen running off to the side at practice Tuesday, NFL Network's Stacey Dales reported. The 31-year-old went through a battery of tests over the weekend that opened the door for this week's advancement. NFL Network Insider Ian Rapoport noted over the weekend that Peterson was on track to make a December return before the playoffs. Obviously this is good news for the Vikings but perhaps not for Peterson, who will be returning to a much different club than he left a few months ago. The patchwork offensive line he'll be running behind has not produced more than 100 rushing yards since an Oct. 3 win over the New York Giants.