BRISTOL, TN - AUGUST 21: Brad Keselowski, driver of the #2 Autotrader Ford, and Kevin Harvick, driver of the #4 Busch Beer Chevrolet, lead a pack of cars during the NASCAR Sprint Cup Series Bass Pro Shops NRA Night Race at Bristol Motor Speedway on August 21, 2016 in Bristol, Tennessee. The race was delayed due to inclement weather on Saturday, August 20. (Photo by Brian Lawdermilk/Getty Images)