Dover International Speedway

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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)

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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)

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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)

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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)