Complex sentence: Biffle won just once in 2007, at Kansas Speedway, and finished 14th in the standings, second-best of the non-Chase drivers as the Chase expanded to a 12-driver format that year.
Split into simpler sentences: Biffle won just once in 2007, at Kansas Speedway. For 2007 Biffle finished 14th in the standings, second-best of the non-Chase drivers as the Chase expanded to a 12-driver format that year.