Denny Hamlin climbs out of his car in victory lane after winning the NASCAR Sprint Cup Series auto race at Kansas Speedway in Kansas City, Kan., Sunday, April 22, 2012. (AP Photo/Orlin Wagner)
Republican presidential candidate and former Massachusetts Gov. Mitt Romney (left) walks Feb. 26, 2012, with Florida Lt. Gov. Jennifer Carroll before the NASCAR Daytona 500 Sprint Cup series auto race at Daytona International Speedway in Daytona Beach, Fla.. (Associated Press)
Tony Stewart, last year's Sprint Cup champion, takes the checkered flag in the first of two 150-mile qualifying races for the Daytona 500. NASCAR's biggest race is Sunday. (Associated Press)
Tony Stewart celebrates after winning the NASCAR Sprint Cup Series auto race and clinching the series championship at Homestead-Miami Speedway in Homestead, Fla., Sunday, Nov. 20, 2011. (AP Photo/Chuck Burton)
Driver Carl Edwards smiles after qualifying for Sunday's NASCAR Ford 400 Sprint Cup series auto race at Homestead-Miami Speedway in Homestead, Fla., Saturday, Nov. 19, 2011. Edwards won the pole position for the race. (AP Photo/Terry Renna)
Tony Stewart (14) trails Carl Edwards (99) by three points heading into the final Sprint Cup race, Sunday at Homestead-Miami Speedway. One or the other will be the new champion. (Associated Press)
This April 26, 2009, file photo shows Carl Edwards hitting the fence during a crash on the last lap of the Aaron's 499 NASCAR Sprint Cup Series race at Talladega Superspeedway, in Talladega, Ala. The death of Indianapolis 500 winner Dan Wheldon has sparked safety discussions throughout motorsports just as NASCAR heads to one of the fastest tracks on its circuit. (AP Photo/Rainier Ehrhardt)
Matt Kenseth and team owner Jack Roush spray champagne as they celebrate Kenseth's win in the NASCAR Sprint Cup Series auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, Oct. 15, 2011. (AP Photo/Terry Renna)
Tony Stewart celebrates with his crew in Victory Lane after winning the NASCAR Sprint Cup Series auto race at New Hampshire Motor Speedway, Sunday, Sept. 25, 2011, in Loudon, N.H. (AP Photo/Jim Cole)
