Born April 21, 1998 Jarrett Allen played in the NBA mainly as a Centre/Forward during their playing career, season(s): 2018-2021. Jarrett Allen is an American professional basketball player for the Cleveland Cavaliers of the National Basketball Association. He played college basketball for the Texas Longhorns. Allen was selected 22nd overall by the Brooklyn Nets in the 2017 NBA draft. In January 2021, he was traded to the Cleveland Cavaliers.