Concord

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Danica Patrick waits in her car before qualifying for Sunday's NASCAR Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Chuck Burton)

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Jimmie Johnson talks to a crew member before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Terry Renna)

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Jamie McMurray waits by his car during practice for Sunday's NASCAR Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Team owner Richard Childress answers a question during a news conference to announce the Goodyear Gives Back charitable program benefiting the "Support Our Troops" organization, at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Chuck Burton)

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Greg Biffle waits by his car before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)

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Austin Dillon prepares before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Thursday, May 22, 2014. (AP Photo/Mike McCarn)