The NASCAR Cup Series Playoffs are approaching their finale and their is one last cut before next week's championship, and it comes following the Xfinity 500 on Sunday, Oct. 26.

Following a thrilling elimination race at the Charlotte Roval, the action now shifts to Las Vegas Motor Speedway for the first race of round 8 of the playoff series. Shane Van Gisbergen registered his fifth victory of the NASCAR Cup Series season in the Bank of America ROVAL 400 last Sunday.

The NASCAR on NBC Throwback marathon will air in three windows on the NBC Sports NOW channel, a free 24/7 streaming channel from NBC Sports offering daily sports talk shows, live sports and highlights on Peacock, The Roku Channel, Xumo, Pluto TV and more.

Tune in today at 1 p.m. ET as Spire Motorsports makes a driver announcement from the NASCAR Production Facility in Concord, North Carolina.

After this weekend at Martinsville, four potential champions will remain in Cup, Xfinity and Trucks. They'll go to Phoenix with a shot.