Dale Earnhardt Jr. has assumed the top spot in the NASCAR Sprint Cup point standings, but it's defending champion Brad Keselowski who finds himself atop the Athlon Sports Horsepower Rankings.
1. Brad Keselowski
If not for an overheating issue late in Fontana (while running fifth), Keselowski would most likely be five-for-five in the top-5 finishes category. The defending champ has come out swinging.