NASCAR Darlington live updates, leaderboard for Southern 500 today

Following 26 regular-season races, the NASCAR postseason has arrived with a revamped Chase format and the elimination of, well, eliminations.The Chase kicks off Sunday, Sept. 6 at Darlington Raceway, the first of 10 postseason races. But the playoff format, which the Cup Series had used since 2014, has been scrapped. That means no more driver eliminations after every three races, and, perhaps more important, no more championship race.Instead, NASCAR is reverting to the Chase format it first impl