Charlotte Motor Speedway

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Ron Hornaday Jr (30) spins as trucks drive down pit road to avoid him 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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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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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)