Mosley just completed his seventh season as an assistant coach with the Dallas Mavericks and he also served as the head coach of Dallas' Summer League squad from 2017-19. Prior to joining the Mavericks, Mosley spent four seasons as an assistant coach for the Cleveland Cavaliers from 2010-14. Before joining the Cavaliers in July 2010, Mosley spent five seasons with the Denver Nuggets. His tenure began in player development and advance scouting before he became an assistant coach for his last three seasons with the franchise. The Nuggets reached the playoffs, winning 50 games or more, each of his final three years.