Sprint Cup Series

NASCAR Kentucky Auto _Lanc.jpg

Matt Kenseth celebrates his victory in the NASCAR Sprint Cup auto race at Kentucky Speedway in Sparta, Ky., Sunday, June 30, 2013 by hoisting the trophy above his head in the winner's circle. (AP Photo/Garry Jones)

NASCAR Sonoma Auto Ra_Lanc.jpg

Martin Truex Jr. races in the NASCAR Sprint Cup series auto race, Sunday, June 23, 2013, in Sonoma, Calif. (AP Photo/Eric Risberg)

NASCAR Michigan Auto _Harr.jpg

Sprint Cup Series driver Greg Biffle celebrates his win in the NASCAR Quicken Loans 400 auto race at Michigan International Speedway, Sunday, June 16, 2013 in Brooklyn, Mich. (AP Photo/Carlos Osorio)

NASCAR Dover Auto Rac_Harr.jpg

Tony Stewart is showered as he climbs out of the car to celebrate in Victory Lane after winning the NASCAR Sprint Cup Series auto race, Sunday, June 2, 2013, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)

NASCAR Richmond Auto _Lanc.jpg

Kevin Harvick does a burnout as he celebrates winning the Toyota Owner's 400 NASCAR Sprint Cup series auto race at Richmond International Raceway in Richmond, Va., Saturday April 27, 2013. (AP Photo/Steve Helber)

NASCAR Martinsville A_Lanc.jpg

Drivers Brad Keselowski, left, and Joey Logano talk in the garage during practice for Sunday's NASCAR Sprint Cup series auto race at Martinsville Speedway in Martinsville, Va., Friday, April 5, 2013. (AP Photo/Steve Helber)

NASCAR Martinsville A_Harr.jpg

Jimmie Johnson celebrates after winning the STP 500 NASCAR Sprint Cup series auto race at Martinsville Speedway in Martinsville, Va., Sunday, April 7, 2013. (AP Photo/Steve Helber)

NASCAR Phoenix Sprint_Lanc.jpg

Denny Hamlin makes a pit stop during a NASCAR Sprint Cup Series auto race, Sunday, March 3, 2013, in Avondale, Ariz. (AP Photo/Matt York)

NASCAR.jpg

** FILE ** In this Nov. 4, 2012, file photo, Jimmie Johnson fires blanks out of a pair of revolvers as he celebrates his win in Victory Lane following the NASCAR Sprint Cup Series auto race at Texas Motor Speedway, in Fort Worth, Texas. The National Rifle Association is taking its relationship with racing to a new level as the title sponsor of a NASCAR Sprint Cup Series race. (AP Photo/Tim Sharp, File)