With the final weekend of the regular season now looming at Richmond International Raceway, there are three spots still open on The Chase Grid for non-race winners to fill heading into Saturday night’s Federated Auto Parts 400 Sprint Cup Series race.  Thirteen drivers have been victorious in 2016: Kyle Larson, Matt Kenseth, Kyle and Kurt Busch, Carl Edwards, Jimmie Johnson, Brad Keselowski, Joey Logano, Kevin Harvick, Martin Truex Junior, Denny Hamlin, Tony Stewart and Chris Buescher.  All are within the requisite top thirty of the standings, which currently leaves a maximum of three post-season spots available based on the point standings.  Four drivers are in the mix for those final three spots: rookie Chase Elliott, Austin Dillon, Jamie McMurray and Ryan Newman – who trails McMurray by seven points in the fight for the final “playoff” spot … Any driver who hasn’t yet won but reaches Victory Lane at Richmond would qualify for the post-season, provided that driver is among the top thirty in points, and would reduce the number of spots available based on the regular-season standings … With the post-season now right around the corner, the race for the Number-1 seed on The Chase Grid is coming down to a two-man battle between Kyle Busch (Joe Gibbs Racing) and Brad Keselowski (Team Penske).  Each has four victories in 2016.  Busch is a four-time winner in the Sprint Cup Series at R-I-R while Keselowski has one victory there.  They finished second and eleventh, respectively, in this year’s first race at Richmond on April 24^th.