Only one more race stands between the Cup Series and the NASCAR Playoffs, but there appears to be a curveball or two waiting. That first round of the postseason will not be easy for anybody. Atlanta, Watkins Glen, and Bristol open up the NASCAR Playoffs. While Atlanta and Bristol leap off the schedule, everyone understands how difficult those two races are, Watkins Glen is laying low. CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once you play $5 in lineups! So, what is going to make The Glen more difficult? According to Jordan Bianchi of The Athletic onThe Teardo…