Race cars are covered from the rain in the garage area before the scheduled start of the Sprint Cup series auto race at Charlotte Motor Speedway in Concord, N.C., Saturday, Oct. 10, 2015. (AP Photo/Chuck Burton)

Team members push Jeb Burton's car through the garage area in the rain before the scheduled start of the race at Charlotte Motor Speedway, Saturday, Oct. 10, 2015. (AP Photo/Mike McCarn)

Team members push Denny Hamlin's car through the garage area in the rain, Saturday, Oct. 10, 2015. (AP Photo/Mike McCarn)

Kyle Busch's car gets pushed in the garage area during the rain before the scheduled start race at Charlotte Motor Speedway in Concord, N.C., Saturday, Oct. 10, 2015. (AP Photo/Chuck Burton)

People walk through the rain in the garage area before the scheduled start of the Sprint Cup race at Charlotte Motor Speedway, Saturday, Oct. 10, 2015. (AP Photo/Mike McCarn)

A security guard stands in the pouring rain on pit road at Charlotte Motor Speedway, Saturday, Oct. 10, 2015. (AP Photo/Chuck Burton)

Fans leave Charlotte Motor Speedway after the NASCAR Sprint Cup Series auto race was postponed due to rain in Concord, N.C., Saturday, Oct. 10, 2015. (AP Photo/Gerry Broome)

Race fans leave the Charlotte Motor Speedway after the race was postponed due to rain in Concord, N.C., Saturday, Oct. 10, 2015. (AP Photo/Gerry Broome)

Equipment used for drying the track sits idle in Turn 4 after the NASCAR Sprint Cup Series auto race was postponed due to rain. (AP Photo/Gerry Broome)

A sign notifies race fans that the NASCAR Sprint Cup Series auto race was postponed at the Charlotte Motor Speedway due to rain. (AP Photo/Gerry Broome)