Jimmie Johnson does a burnout after winning the NASCAR Sprint Cup series Coca-Cola 600 auto race at the Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Gerry Broome)
Driver Jimmie Johnson (48) takes the checkered flag to win the NASCAR Sprint Cup series Coca-Cola 600 auto race at the Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Gerry Broome)
Jimmie Johnson (48) leads Matt Kenseth (20) down the front stretch in the closing laps of the NASCAR Sprint Cup series Coca-Cola 600 auto race at the Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. Johnson won the race. (AP Photo/Gerry Broome)
Jimmie Johnson, right, is congratulated by Kevin Harvick, left, 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/Terry Renna)
Driver Jimmie Johnson celebrates in Victory Lane after winning the NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway, Sunday, May 25, 2014, in Concord, N.C. (AP Photo/Chuck Burton)
Driver Jimmie Johnson raises the trophy 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/Terry Renna)
Driver Jimmie Johnson holds the checkered flag after winning the NASCAR Sprint Cup series Coca-Cola 600 auto race at the Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Gerry Broome)
In this photo taken at a slow shutter speed crew members perform a pit stop on driver Jimmie Johnson's car during the NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Terry Renna)
Crew chief Chad Knause, left, talks with Jimmie Johnson, right, during practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 24, 2014. (AP Photo/Chris Keane)