Carl Edwards rolled to a dominating win at Phoenix International Speedway in Avondale, Ariz., that staved off Kyle Busch's bid to clinch the Nationwide Series title.

Busch overcame an early accident to finish ninth, but because Edwards picked up bonuses for leading the most laps and winning the race, Busch will have to wait until the finale next week to wrap up his first NASCAR championship.

The race was marked by yet another run-in between rivals Denny Hamlin and Brad Keselowski in a late sequence of hard racing. Both were inside the top five when Hamlin tapped Keselowski, who retaliated by hitting Hamlin twice. The second hit caused Hamlin to spin.

Busch wrecked nine laps into the race. He needed only to finish 15th or better to clinch the title. Busch started fourth, but lost control of his Toyota and hit the outside wall to cause significant left-side damage to his car. He pitted twice for repairs and restarted in 35th.

Ron Hornaday became the oldest champion in NASCAR history late Friday night by winning his record fourth title in the Trucks Series. Hornaday, 51, needed only to finish ahead of Matt Crafton at Phoenix to win the title, and he wrapped it up by finishing fourth to Crafton's eighth. Kevin Harvick, Hornaday's team owner, won the race and the two celebrated by lining up side by side at the finish line for a simultaneous burnout.

Former NASCAR champion Bobby Labonte signed a deal to drive for TRG Motorsports next season. Labonte already has raced five times for TRG this season, and will finish the year in the No. 71 Chevrolet for a total of seven races.

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