William Byron earns walk-off win to make Championship 4
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William Byron makes championship field with 11th-hour win at Martinsville
With a heroic, gloves-off drive on Sunday in the crucible that is Martinsville Speedway, William Byron earned a shot at the NASCAR Cup Series title and simultaneously saved the rest of the Championship 4 field from its worst nightmare.
The NASCAR on NBC crew recaps the action from Martinsville Speedway, where William Byron and three other drivers punched their ticket to the Championship 4.
Hendrick Motorsports driver William Byron chooses caution despite winning pole position at the Martinsville Speedway.
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