Beaubier participated in the 2007 edition of the Red Bull Rookies Cup and the following year was involved in the CEV Repsol in the 125cc category. He made his debut in the lightweight class of the world championship in 2009 and then returned to compete in the US championships where he confirmed his competitiveness. He made his debut as a wildcard in WorldSBK in 2016 at the English Round, managing to get 10 points in Race 2. Following his experience in the World Championship of series-production, he returned home where he earned 51 wins and collected five AMA Superbike titles. 2021 marked his return to the international scene, racing for the American Racing Team in Moto2™. The Californian was faced with a tough year, learning a new motorcycle and circuits, but was extremely impressive. He ended the year with two top five finishes, at home in Austin and then in Portimao, and he'll be looking for even better in 2022.