Concord

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Kurt Busch prepares for interviews before the NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Sunday, May 25, 2014. (AP Photo/Terry Renna)

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Jeff Gordon waits in his car before practice for Sunday's NASCAR Sprint Cup series Coca-Cola 600 auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 24, 2014. (AP Photo/Mike McCarn)

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Kyle Larson (42) takes the checkered flag to win the NASCAR Nationwide series History 300 auto race at the Charlotte Motor Speedway in Concord, N.C., Saturday, May 24, 2014. (AP Photo/Gerry Broome)

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In this image taken with a slow shutter speed, Kyle Larson (42) races along at the top of Turn 2 during the NASCAR Nationwide series History 300 auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 24, 2014. Larson won the race (AP Photo/Chris Keane)

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Kyle Larson (42) leads cars out of Turn 2 after a caution during the NASCAR Nationwide series History 300 auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, May 24, 2014. (AP Photo/Chris Keane)