Auto Racing

William Byron wins the NASCAR Xfinity Series championship

William Byron wins the NASCAR Xfinity Series championship

Dale Earnhardt Jr. got the best retirement gift he could have asked for when William Byron won the Xfinity Series championship for JR Motorsports on Saturday, one day before Earnhardt's final race as a full-time driver.

NASCAR's most popular driver is a part owner of the race team with sister Kelley and boss Rick Hendrick, and JR Motorsports went in to the finale at Homestead-Miami Speedway with a 75 percent chance of winning the title. JRM drivers Justin Allgaier, Elliott Sadler and Byron were up against Daniel Hemric of Richard Childress Racing for the championship.

Hemric appeared up for the challenge at the start and he led the title contenders until he headed to pit...

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