John Hunter Nemechek will drive the No. 4 Kyle Busch Motorsports Toyota in the 2021 NASCAR Camping World Truck Series season. Last year, he was a Sunoco Rookie of the Year contender and in his first full season in the NASCAR Cup Series after filling for the injured Matt Tifft in 2019. Nemechek, the son of former Xfinity champion Joe Nemechek, drove the No. 23 Chevrolet for GMS Racing in the Xfinity Series in 2019. In 2018, John Hunter Nemechek earned his first career Xfinity victory at Kansas, one of 11 top-10 finishes he had in 18 starts. He has six career Gander RV & Outdoors Truck Series wins and twice qualified for the playoffs.