Next stop Martinsville Speedway for Sunday’s Goody’s Fast Relief 500 as the semifinal round of the post-season Chase for the NASCAR Sprint Cup begins.  The eight remaining title contenders are traveling along a path that will ultimately lead to a championship for one with 1,076 “Miles-2-Miami” left before Ford Championship Weekend in November.   This will be the sixth and final short-track race of the year and the only Chase race to be run on an oval less than one mile in length.  Joe Gibbs Racing has dominated the 2016 short-track schedule with wins in four of the five races run thus far.  Carl Edwards has victories at Richmond International Raceway and Bristol.  Denny Hamlin won last month in Richmond and Kyle Busch was victorious in this year’s first visit to Martinsville on April 3^rd.  All four of J-G-R’s Cup Series competitors, including Matt Kenseth, have advanced to the Chase’s Round of Eight … Busch is bidding to become the first driver to sweep both Martinsville races in a single season since Hamlin doubled up in 2010.