Tony Stewart prepares to start the NASCAR Sprint Cup series auto race at Texas Motor Speedway Monday, April 7, 2014, in Fort Worth, Texas. Stewart starts on the pole in the race which was postponed a day because of rain. (AP Photo/Ralph Lauer)
Tony Stewart (14) and Kevin Harvick (4) race through Turn 4 during the NASCAR Sprint Cup series auto race at Texas Motor Speedway, Monday, April 7, 2014, in Fort Worth, Texas. (AP Photo/Larry Papke)
Driver Denny Hamlin (11) leads Tony Stewart (14) as he makes his way around the track during practice for the NASCAR Sprint Cup series auto race at Bristol Motor Speedway on Saturday, March 15, 2000, in Bristol, Tenn. (AP Photo/Wade Payne)
Driver Tony Stewart (14) signs autographs before practice for the NASCAR Sprint Cup series auto race at Bristol Motor Speedway on Friday, March 14, 2014, in Bristol, Tenn. (AP Photo/Wade Payne)
Kevin Harvick, left, talks with Tony Stewart during qualifying for Sunday's NASCAR Sprint Cup Series auto race on Friday, March 7, 2014, in Las Vegas. (AP Photo/Isaac Brekken)
Kevin Harvick, right, gets a hug from Tony Stewart after Harvick woin the NASCAR Sprint Cup Series auto race Sunday, March 2, 2014, in Avondale, Ariz. (AP Photo/Ross D. Franklin)