With a Championship 4 spot on the line Sunday, William Byron put the bumper to Ryan Blaney to win at Martinsville Speedway in the third-round finale of the NASCAR Cup Series playoffs .

Byron made his winning move with 43 laps remaining, seizing the bottom lane in Turn 1 and moving Blaney up the track by tagging him in the left rear.

The Hendrick Motorsports driver led the rest of the way and fended off Blaney on a restart with 11 laps remaining. Starting from the pole position, Byron led a race-high 304 of 500 laps for his third victory this season in the No. 24 Chevrolet.

Both drivers were in must-win situations to advance to the championship round.

Blaney, who was trying to win his third consecutive playoff race at Martinsville, came up one spot short despite qualifying 31st and le

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