DARLINGTON, SC - SEPTEMBER 04: Casey Mears, driver of the #13 GEICO Chevrolet, leads a pack of cars during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Jonathan Ferrey/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Cars race during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Brian Lawdermilk/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: General view during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Jonathan Ferrey/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Austin Dillon, driver of the #3 American Ethanol Chevrolet, pits during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Jerry Markland/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Cars race at sunset during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Jonathan Ferrey/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Fans watch the action during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Brian Lawdermilk/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Cars race at sunset during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Jonathan Ferrey/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Cars race at sunset during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Jonathan Ferrey/Getty Images)