International Speedway Corporation

bd39a0b74738c115550f6a706700c133.jpg

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)

4a71631e4725c115550f6a706700f18f.jpg

Danica Patrick adjusts her hair before practice for the NASCAR Sprint Cup series auto race, Saturday, May 31, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)

eafafe2146a9bf15550f6a7067007efb.jpg

Danica Patrick signs for fans after practice for the NASCAR Sprint Cup series auto race, Saturday, May 31, 2014, at Dover International Speedway in Dover, Del. (AP Photo/Nick Wass)

c9d49b564739c115550f6a7067004b55.jpg

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)

2c5b5a5a46a5bf15550f6a7067000ec6.jpg

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)