Rowan "R. J." Barrett Jr. (born June 14, 2000) is a Canadian basketball player for the Duke Blue Devils of the Atlantic Coast Conference (ACC). A native of Mississauga, he attended St. Marcellinus Secondary School in his hometown. He finished his high school career at Montverde Academy in Montverde, Florida, where he was considered a five-star recruit and the consensus top recruit in his class, earning Naismith Prep Player of the Year and Gatorade National Player of the Year accolades. He has represented Canada in international youth competition, most notably winning the gold medal and MVP at the 2017 FIBA Under-19 Basketball World Cup.