NASCAR — Darlington Sept 6, Only time there this season! by AllAutoExperts | 17 April, 2020 Share : NASCAR makes it only stop this season at the Darlington Race Track. September 6 Darlington hosts the Bojangles' Southern 500. The defending champ is Kevin Harvick.After qualifying races of the Sprint Cup Series and the Xfinity Series and the Camping World Truck Series, they will all head off to Darlington where all three series will run races.The Sprint cup schedule for Darlington finalized and the other two series schedule will be known after next weekend.Jimmie Johnson and Kyle Busch have each won four Sprint Cup events this season. Dale Earnhardt Jr. and Kurt Busch are both two-time winners.Kyle Busch has to finish 30th or higher to qualify no matter how many wins he has this season.