The 2021 Beef. It's What's For Dinner. 300 was a NASCAR Xfinity Series race held on February 13, 2021. It was contested over 122 laps-- extended from 120 laps due to an overtime finish -- on the 2.5-mile (4.0 km) asphalt superspeedway. It was the first race of the 2021 NASCAR Xfinity Series season. Team Penske driver Austin Cindric, the reigning Xfinty Series champion, collected his first win of the season.