Concord

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Ron Hornaday Jr. (30) spins in Turn 4 as Brad Keselowski, left, avoids a collision during the NASCAR Truck series auto race in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)

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Ryan Blaney (29) is hit from behind by Brian Ickler (7) during the NASCAR Trucks series auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Terry Renna)

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Drivers Matt Kenseth, left, and Kyle Busch talk before practice for Saturday's NASCAR Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Bob Jordan)

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Kyle Busch pits during the NASCAR Trucks series auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Terry Renna)

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Cars approach the start of the NASCAR Truck series auto race in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)

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Marcus Ambrose (9) spins as Ricky Stenhouse Jr (17) drives past during the NASCAR Sprint Showdown auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Bob Jordan)

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Marcos Ambrose (9) spins on the back stretch in front of Danica Patrick (10) and Cole Whitt (26) during the NASCAR Sprint Showdown auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)

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Cars approach the start line during the NASCAR Sprint Showdown auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)

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Drivers navigate Turn 4 as they approach the start of the NASCAR Sprint Showdown auto race at the Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Gerry Broome)

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Driver Brad Keselowski laughs with crew members before practice for Saturday's NASCAR Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C., Friday, May 16, 2014. (AP Photo/Mike McCarn)