SPARTA, Ky. (AP) - Kentucky Speedway is hot and bumpy, and Brad Keselowski can't wait to race. So much that he's competing in all three NASCAR national series events this weekend. Again. Keselowski's eagerness is understandable. He's the defending champion in the Sprint Cup race Saturday night, one of five series victories that propelled the Michigan driver to last season's title. Standing ninth in the hunt for a berth in the Chase, he aims to improve his standing with his first win this season. Keselowski believes there's no better place to get it than on the 1.5-mile oval that has served him well. After all, he was second in last year's Truck Series race and won the Nationwide event in 2011 before last year's Cup victory.