The final two Championship 4 drivers will be decided in the Xfinity 500 NASCAR Cup Series playoff race at Martinsville Speedway.

Who won the Xfinity 500 at Martinsville Speedway on Sunday? Here are the results of the NASCAR Cup Series playoff race.

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.

William Byron won his way into the NASCAR Cup Series championship round with a Sunday victory at Martinsville.

Penultimate Race of the Season Begins Sunday at 2 p.m. ET on NBC and Peacock; Pre-Race Coverage on NBC and Peacock Begins at 1:30 p.m. ET with Countdown to Green

With lines blurry and six desperate playoff drivers, NASCAR's Elliott Sawyer looks to clarify communication between teams to ensure their number one goal is the highest possible finishing position for their driver.

Half of the remaining field in the Cup Series playoffs is facing essentially a must-win situation at Martinsville Speedway, where NASCAR weathered a race manipulation scandal in last year's third-round finale.

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.