NASCAR Cup Series driver William Byron (24) car prior to the NASCAR Xfinity 500 at Martinsville Speedway. David Yeazell-USA TODAY Sports

William Byron was the fourth driver to qualify for the Championship 4, and he was the only one to qualify based on points. The driver No. 24 Chevrolet Camaro ZL1 for Hendrick Motorsports endured some really tough conditions to qualify.

Byron finished 13th in the Xfinity 500 at Martinsville Speedway on Sunday. That was enough for him to finish eight points ahead of Denny Hamlin for the final spot in the Championship 4. Kyle Larson, Christopher Bell and Ryan Blaney all qualified by winning races.

Temperatures were hot at Martinsville over the weekend, and Byron had lots of difficulty keeping his helmet cool during the 500-lap race. Byron battled poor vision over the last 60 laps on Sunday because he was struggling to keep cool.

“It was kind of hell in a bottle,” Byron said after the race, via RacerMag’s Kelly Crandall. I’ve never been so mad in a race car, I’ve never wanted to get out so much, I’ve never been so frustrated at the car…”

Byron said he probably would have pitted to fix the issue if a spot in the Championship 4 weren’t on the line. But since it was, he endured the hot conditions and poor vision.

Now it will be Byron, Larson, Bell and Blaney battling for the Cup Series championship next weekend in Phoenix. Byron has won 10 Cup Series races in his career. The 25-year-old driver has won six races this season, including March’s race at Phoenix Speedway.

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