Adrian Peterson: 'I'm entering my prime'The All-Pro turns 30 in March, but believes his best years as an NFL running back are ahead of him.SI Staff|Share on FacebookShare on XAdd us as a preferred sourceThe All-Pro turns 30 in March, but believes his best years as an NFL running back are ahead of him.Add us as a preferred source on GoogleFollowLoading recommendations... Please wait while we load personalized content recommendationsPublished Dec 7, 2014 | Modified Dec 7, 2014SI STAFFShare on FacebookShare on XHome/NFL