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DOVER, DE - OCTOBER 02: Smoke is seen from Kevin Harvick, driver of the #4 Jimmy John's Chevrolet, during the NASCAR Sprint Cup Series Citizen Solider 400 at Dover International Speedway on October 2, 2016 in Dover, Delaware. (Photo by Brian Lawdermilk/Getty Images)

DOVER, DE - OCTOBER 02:  Smoke is seen from Kevin Harvick, driver of the #4 Jimmy John's Chevrolet, during the NASCAR Sprint Cup Series Citizen Solider 400 at Dover International Speedway on October 2, 2016 in Dover, Delaware.  (Photo by Brian Lawdermilk/Getty Images)