Clint Bowyer won his first road-course race in the Sprint Cup Series with a dominating performance in Sunday's Toyota/Save Mart 350 at Sonoma. Bowyer drove the number-15 car to his first win for Michael Waltrip Racing, leading 71-of-112 laps. The second caution of the day set up a green-white-checkered finish in which Bowyer beat defending Cup champion Tony Stewart to the line for his sixth-career win. Kurt Busch couldn't defend his race title with a third-place finish while Brian Vickers came in fourth followed by Jimmie Johnson. Despite a 13th-place finish, Matt Kenseth remained atop the point standings, while last week's winner at Michigan, Dale Earnhardt Jr., slipped to third in points behind Greg Biffle after a 23rd-place finish.