William Byron will drive the No. 24 Hendrick Motorsports Chevrolet during his inaugural season in the Monster Energy NASCAR Cup Series. Byron competed full-time in the Xfinity Series for JR Motorsports in 2017, earning the championship and Sunoco Rookie of the Year. Byron won his first Xfinity race at Iowa in 2017, and has four victories in the Xfinity series, in total. He earned Rookie of the Year in the Camping World Truck Series in 2016 while setting a rookie record for wins, seven. Byron is also the 2015 NASCAR K&N Pro Series East champion.