The NASCAR X-Finity Series runs on the mile-and-a-half desert oval with Saturday’s Boyd Gaming 300, where Austin Dillon seeks his second straight Vegas victory. If successful, he would be the first driver with back-to-back wins since the track first hosted the series in 1997. Dillon is among forty-two drivers on the preliminary entry list that includes early-season points leader Elliott Sadler … Five drivers are signed up for double duty at Las Vegas Motor Speedway: Dillon, Almirola, Busch, Chase Elliott and Brad Keselowski. Team owner Jack Roush has amassed thirteen victories in Las Vegas – seven in the Sprint in the X-FINITY Series, leading both divisions.