The BetMGM 300 Xfinity Series race at Charlotte Motor Speedway had 1,148,000 total viewers, seeing William Byron win his first series race since 2017.
Compared to the 13th race of the 2024 season at Portland International Raceway, there was a 56% increase in viewership. This marks the first time since 2016 that the opening 13 races of the season have had at least one million viewers.
— The CW Sports (@TheCW_Sports) May 28, 2025