LAS VEGAS — Matt Kenseth won on his 41st birthday in just his third start for Joe Gibbs Racing, barely holding off Kasey Kahne at Las Vegas Motor Speedway for his 25th career victory Sunday. “I was real nervous all day,” Kenseth said. “(Kahne) had the best car. I told (crew chief) Jason (Ratcliff) with about 12 to go that I was sorry we were going to lose. We were just too tight. ... We didn't have the fastest car there, but we had it where we needed it to be.” Kenseth took charge by taking only fuel on the final pit stop during caution while almost everybody else replaced two tires. He took the lead and held onto it, using his veteran savvy — and a few screamed instructions at his new spotter — to keep Kahne's impressive Chevrolet behind him to the finish. He celebrated with uncommon vigor after his JGR Toyota crossed the line. He's still getting comfortable with his new teammates after leaving Roush Fenway Racing in the highest-profile driver move of the offseason, joining Gibbs after 13 seasons with RFR. “I'm not a huge goal person, but my goal was to win, and to win early,” Kenseth said. Pole-sitter Brad Keselowski finished third, with Kenseth's teammate, Kyle Busch, in fourth and Carl Edwards fifth. Jimmie Johnson, the overall points leader, was sixth and Dale Earnhardt Jr. seventh. Defending Vegas champion Tony Stewart finished 11th, while Gibbs driver Denny Hamlin was 15th after an eventful week featuring a $25,000 fine from NASCAR for criticizing the new Gen-6 race car. The win was the 50th for Toyota in Sprint Cup Series competition. Kenseth is just the third NASCAR driver to win on his birthday, joining Cale Yarborough — who did it twice — and Busch. Danica Patrick, the pole winner two weeks ago at Daytona, struggled with her car from the start, going two laps down by the 60th lap and later getting penalized for a tire violation. She finished 33rd. — AP