Mark Martin, driver of the #5 CARQUEST/Kellogg's Chevrolet, sits in his car in the garage during practice for the NASCAR Sprint Cup Series Autism Speaks 400 at Dover International Speedway. (Photo by Jeff Zelevansky/Getty Images for NASCAR) hide

Mark Martin, driver of the #5 CARQUEST/Kellogg's Chevrolet, sits in his car in the garage during practice for the NASCAR Sprint ... more