NASCAR Cup Series Playoff Standings After Martinsville

The field is set for the Championship 4 at Phoenix Raceway next Sunday.

William Byron won Sunday's Xfinity 500 at Martinsville Speedway, punching his ticket into the Championship 4. He joins Denny Hamlin and Chase Briscoe as drivers in the Championship 4 by virtue of wins during the Round of 8.

Byron entered Martinsville in a must-win situation after incidents at both Las Vegas and Talladega to start the Round of 8. Byron led 304 of the race's 500 laps for a convincing victory.

Meanwhile, the battle for the final spot in the Championship 4 came down to Kyle Larson and Christopher Bell. Larson's fifth-place finish was enough to secure him that position, finishing seven points ahead of Bell.

The NASCAR Cup Series Championship Race takes place next Sunday, November 2, at 3 p.m. ET at Phoenix Raceway. Coverage of the event will be on NBC, the Motor Racing Network and SiriusXM NASCAR Radio.

-Photo credit: Jared C. Tilton/Getty Images

NASCAR Cup Series Playoff Standings Following Xfinity 500