Sam Hornish Jr. does a burnout after winning the NASCAR Nationwide auto race, Sunday, May 18, 2014, at Iowa Speedway in Newton, Iowa. (AP Photo/Charlie Neibergall)
Sam Hornish Jr. holds the trophy after winning the NASCAR Nationwide auto race, Sunday, May 18, 2014, at Iowa Speedway in Newton, Iowa. (AP Photo/Charlie Neibergall)
Sam Hornish Jr. celebrates in victory lane after winning the NASCAR Nationwide auto race, Sunday, May 18, 2014, at Iowa Speedway in Newton, Iowa. (AP Photo/Charlie Neibergall)
Jamie McMurray celebrates in Victory Lane after winning the NASCAR Sprint All-Star auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 17, 2014. (AP Photo/Terry Renna)
Sam Hornish Jr. autographs a shirt for David Hales, of La Salle, Ill., right, before the NASCAR Nationwide auto race, Sunday, May 18, 2014, at Iowa Speedway in Newton, Iowa. (AP Photo/Charlie Neibergall)
Trevor Bayne poses for a photo with Bob Johnson, of Sioux City, Iowa, right, during an autograph session before the NASCAR Nationwide auto race, Sunday, May 18, 2014, at Iowa Speedway in Newton, Iowa. (AP Photo/Charlie Neibergall)
Sam Hornish Jr. leads Ryan Blaney, left, during the NASCAR Nationwide auto race, Sunday, May 18, 2014, at Iowa Speedway in Newton, Iowa. (AP Photo/Charlie Neibergall)
Kurt Busch relaxes on a flight from Indianapolis, after the first day of qualifying for the Indianapolis 500, to Charlotte Motor Speedway for the NASCAR Sprint All-Star auto race in Concord, N.C., Saturday, May 17, 2014. (AP Photo/Dan Gelston)
Kurt Busch sleeps on a flight from Indianapolis after qualifying for the Indianapolis 500 to Charlotte Motor Speedway for the NASCAR Sprint All-Star auto race, in Concord, N.C., Saturday, May 17, 2014. (AP Photo/Dan Gelston)
Jamie McMurray celebrates after winning the NASCAR Sprint All-Star auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 17, 2014. (AP Photo/Gerry Broome)
Jamie McMurray celebrates in Victory Lane after winning the NASCAR Sprint All-Star auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 17, 2014. (AP Photo/Terry Renna)
Jamie McMurray celebrates after winning the NASCAR Sprint All-Star auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 17, 2014. (AP Photo/Gerry Broome)