Cole Custer earns first XFINITY win at Miami; William Byron earns championship As Cole Custer celebrated his first victory in the NASCAR XFINITY Series and 19-year-old William Byron reveled in the series championship, a heartbroken and angry Elliott Sadler confronted the driver he believed cost him a long-coveted NASCAR title. Custer took the checkered flag in a different zip code, crossing the finish line 15.405 seconds ahead of second-place Sam Hornish Jr., who delivered the owners’ championship to Roger Penske. The real action, however, occurred three-quarters of a lap behind the winner. William Byron read more https://www.nascar.com/news-media/2...stead-miami-race-recap-results-season-finale/