There’ll be high drama in this weekend’s Sprint Cup/X-FINITY Series doubleheader at Dover International Speedway with four Cup Series drivers facing elimination in the Chase for the NASCAR Sprint Cup.  With wins at Chicagoland Speedway and New Hampshire, respectively, Martin Truex Junior and Kevin Harvick are moving on.  But at the bottom of the post-season standings, four drivers are looking to get their title hopes back on track in Delaware’s capital city: Jamie McMurray, Austin Dillon, Tony Stewart and Chris Buescher.  None of those four have cracked the top ten in either of the first two post-season races … In the X-FINITY Series, Elliott Sadler’s victory at Kentucky Speedway moved him into the next round.  But after finishing only twenty-eighth in the opening race of the inaugural Chase, top-seeded Erik Jones finds himself ninth in the twelve-man title field with just two weeks left before four drivers are eliminated from championship contention.