Kyle Busch won for the 10th time in the Xfinity Series this season with a victory at Phoenix International Raceway on the night NASCAR's second-tier series' set its inaugural championship field. The final four for next weekend's race at Homestead-Miami Speedway will be a battle between Dale Earnhardt Jr. and Joe Gibbs. Both car owners got two drivers each into the championship field the first year NASCAR rolled out the Chase for its lower two national series. More...