Driver Kyle Busch (18) leads the field to the green flag for the start of a NASCAR Sprint Cup Series auto race at Martinsville Speedway, Sunday, March 30, 2014, in Martinsville, Va. (AP Photo/Mike McCarn)
Brad Keselowski's (2) car is damaged in a pit road accident with Kasey Kahan (5) and Kurt Busch (41) during a NASCAR Sprint Cup Series auto race at Martinsville Speedway in Martinsville, Va., Sunday, March 30, 2014. (AP Photo/Mike McCarn)
Workers try to dry the race track before the start of a NASCAR Truck Series auto race at Martinsville Speedway in Martinsville, Va., Saturday, March 29, 2014. (AP Photo/Mike McCarn)
Trucks sit on pit road under covers as a crew member sweeps water from a pit stall during a rain delay for a NASCAR Truck Series auto race at Martinsville Speedway in Martinsville, Va., Saturday, March 29, 2014. (AP Photo/Mike McCarn)
Trucks sit under covers as Air Titans try to keep the track dry during a rain delay at the NASCAR Truck Series auto race at Martinsville Speedway in Martinsville, Va., Saturday, March 29, 2014. (AP Photo/Steve Sheppard)