Chase Briscoe clinched the final playoff spot in the NASCAR Cup Series by winning the Southern 500 at Darlington, knocking Chris Buescher out of contention. Tyler Reddick secured the regular season championship, finishing just one point ahead of Kyle Larson, which grants him extra playoff points. The NASCAR Cup playoffs will commence next week in Atlanta, with the top 12 drivers advancing to the next round after the Round of 16, which consists of three races. Additionally, the Xfinity Series has updated its owner and manufacturer standings following the Darlington race, as teams and manufacturers vie for the respective championships based on cumulative points accrued throughout the season. The Xfinity Owner and Manufacturer Championships are critical in recognizing consistent performance across the 33-race season.