Jimmie Johnson drives during the NASCAR Sprint Cup series auto race, Sunday, June 1, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson drives during the NASCAR Sprint Cup series auto race, Sunday, June 1, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson's car is pushed out of the garage for practice for the NASCAR Sprint Cup series auto race, Saturday, May 31, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson leaves the garage area for practice for the NASCAR Sprint Cup series auto race, Saturday, May 31, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Molly Riley)
Jimmie Johnson adjusts his helmet during practice for the NASCAR Sprint Cup series auto race, Saturday, May 31, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)
Jimmie Johnson (48) passes Matt Kenseth (20) for the lead in the closing laps of the NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Mike McCarn)
Jimmie Johnson celebrates in Victory Lane after winning the NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Chuck Burton)