HAMPTON, Ga. (AP) — A.J. Allmendinger finally won on an oval. He might just retire. Taking advantage of mistakes by the three leaders, the 38-year-old Californian cruised to victory by nearly 2 seconds over pole-sitter Noah Gragson in the Xfinity Series race at Atlanta Motor Speedway on Saturday. "Oh my god,” Allmendinger said as he climbed from his No.