CHARLOTTE, NC – MAY 15: Greg Biffle, driver of the #16 Ortho Ford, and Paul Menard, driver of the #27 Serta/Menards Chevrolet, lead the field through the green flag to start the NASCAR Sprint Cup Series Sprint Showdown at Charlotte Motor Speedway on May 15, 2015 in Charlotte, North Carolina. (Photo by Sarah Glenn/NASCAR via Getty Images)