Nascar

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Austin Dillon (3) and Greg Biffle (16) lead the field to the green flag for the start of the first of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/Phelan M. Ebenhack)

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Crew members work on pit road under threatening skies during practice for Sunday's NASCAR Daytona 500 Sprint Cup series auto race in Daytona Beach, Fla., Friday, Feb. 21, 2014. (AP Photo/Terry Renna)

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Clint Bowyer (15) flips over David Ragan (34) after a collision coming out of Turn 4 during the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/Phelan M. Ebenhack)

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Clint Bowyer (15) flips over David Ragan (34) after a collision coming out of Turn 4 during the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/Phelan M. Ebenhack)

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Clint Bowyer (15) flips upside down as he is involved in a multi-car crash with David Ragan (34) and others on the final lap of the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/John Raoux)

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Denny Hamlin, center, cheers as he stands on his car in Victory Lane after winning the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/John Raoux)

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Jimmie Johnson gets out of his car after it came to a rest near the finish line after being involved in a multi-car collision on the final lap during the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/Phelan M. Ebenhack)

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Martin Truex Jr., left, walks away from his car after he was involved in a multi-car crash on the last lap of the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/John Raoux)

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Clint Bowyer (15) flips upside down as he is involved in a multi-car crash with David Ragan (34), Carl Edwards (99) and others on the final lap of the second of two NASCAR Sprint Cup qualifying auto races at Daytona International Speedway in Daytona Beach, Fla., Thursday, Feb. 20, 2014. (AP Photo/John Raoux)