LAS VEGAS, NEVADA - MARCH 05: William Byron, driver of the #24 RaptorTough.com Chevrolet, takes the checkered flag to win the NASCAR Cup Series Pennzoil 400 at Las Vegas Motor Speedway on March 05, 2023 in Las Vegas, Nevada. (Photo by Chris Graythen/Getty Images) | Getty Images
LAS VEGAS, NEVADA - MARCH 05: William Byron, driver of the #24 RaptorTough.com Chevrolet, takes the checkered flag to win the NASCAR Cup Series Pennzoil 400 at Las Vegas Motor Speedway on March 05, 2023 in Las Vegas, Nevada. (Photo by Chris Graythen/Getty Images) | Getty Images

Las Vegas TV ratings

FOX had just shy of 4 million viewers, in at 3.991 million viewers, for Sunday’s NASCAR Cup Series race at Las Vegas Motor Speedway. Viewers were down from 4.544 million last year. The Cup race was the most watched form of motorsports in the United States over the weekend, topping  the F1 and IndyCar season openers.