William Byron has been in the NASCAR scene since 2015. Still, it seems that his career has been pretty much fast-tracked. He debuted in the Truck Series in 2015, with a full-time debut in 2016. A year later, he had his full-time Xfinity Series debut, grabbing four wins and the title. Then in 2018, he moved up once again, this time to the Cup Series, and has been racing there ever since. Interestingly, according to former Hendrick Motorsports crew chief Steve Letarte from Cornish, ME, the 24-year-old may have moved too early.