LAS VEGAS -- Matt Kenseth solidified Roush Racing's hold on Las Vegas Motor Speedway by winning the UAW-DaimlerChrysler 400 on Sunday -- giving his team its fourth victory in the track's six-year Winston Cup history.

Kenseth, who won a Winston Cup-best five races last season, got incredible help in the pits -- his crew gave his Ford four tires in 13 seconds on their final stop -- to jump out to a huge lead and beat Dale Earnhardt Jr. to the finish line by 9.104 seconds.

Since NASCAR's Winston Cup Series began racing in Vegas in 1998, Roush drivers Mark Martin, Jeff Burton and Kenseth have all made it to Victory Lane. Burton did it back-to-back in 1999 and 2000.

Michael Waltrip finished third in a Chevrolet and took over the Winston Cup points lead. He was followed by Joe Gibbs Racing teammates Bobby Labonte and Tony Stewart.

Burton was sixth. Ryan Newman came back from falling two laps down early in the race to finish seventh in a Dodge.

Sterling Marlin, Joe Nemecheck and Steve Park rounded out the Top 10.

Only 11 cars finished on the lead lap, and the front five were all running individually at the end of the race with huge gaps between them on the 1.5-mile oval.

It meant the best racing was actually for sixth, seventh and eighth place and led to late-race contact between Marlin and Jimmie Johnson. The two were running side-by-side when Marlin wiggled just a bit coming out of Turn 4 on the final lap and tapped Johnson, sending him spinning through the infield grass.

Johnson wound up 11th, the last car on the lead lap.

Toyota Indy 300

HOMESTEAD, Fla. -- Scott Dixon won his Indy Racing League debut, grabbing the lead during his final pit stop and easily holding off Gil de Ferran in the Toyota Indy 300.

The 22-year-old New Zealander took the lead from de Ferran on the 148th lap of the 200-lap event at Homestead-Miami Speedway. Dixon beat the more experienced Brazilian to the finish by 0.057 seconds -- about six car-lengths. He averaged 153.710 mph.

The last driver to win his first IRL start was Juan Montoya, who won the 2000 Indianapolis 500 (his only IRL race).

--From wire reports