Jayson Christopher Tatum (born March 3, 1998) is an American professional basketball player for the Boston Celtics of the National Basketball Association (NBA). A native of St. Louis, Missouri, Tatum attended hometown Chaminade College Preparatory School, where he was rated a five-star recruit and regarded as one of the top players in the Class of 2016 by recruiting services. After one season with Duke, he entered the 2017 NBA draft, and was selected with the third overall pick by the Boston Celtics.
Tatum attended Chaminade College Preparatory School in Creve Coeur, Missouri. As a freshman, he averaged 13.3 points and 6.4 rebounds per game and was named 2013 Metro Catholic Conference Co-Player of the year, leading the Red Devils to both (MCC) and Missouri District 2 crowns. As a sophomore in 2014, he averaged 26.0 points and 11.0 rebounds per game.
As a junior, Tatum averaged 25.9 points, 11.7 rebounds, and 3.4 assists while earning Second-team Naismith Trophy All-American honors. In summer 2015, Tatum joined the St. Louis Eagles Amateur Athletic Union (AAU) team on the highly competitive Nike Elite Youth Basketball League (EYBL) Circuit. On July 11, the Eagles defeated future Duke teammate Harry Giles and Team CP3 74–73 in the Nike Peach Jam Semi-Finals with a game-winning buzzer-beater to advance to the championship game. Tatum finished the game with 28 points and 5 rebounds. On July 12, Tatum tallied 24 points, 7 rebounds, and 4 blocks in a 104–77 loss to the Georgia Stars and future Duke one-and-done Wendell Carter in the 2015 Nike Peach Jam championship game. During the Circuit, Tatum led the EYBL in scoring with 26.5 points and 9.5 rebounds per game.