In 2021, Harrison was appointed as the general manager and president of basketball operations for the Dallas Mavericks, succeeding Donnie Nelson.
[3] Harrison graduated with a degree in biological and medical sciences and was a two-time Arthur Ashe Jr. Scholar-Athlete award winner.
Harrison played for the Black Hills Posse of the International Basketball Association (IBA) during the 1997–98 season where he averaged 8.9 points and 3.2 rebounds per game.
As part of the role, Harrison represented players such as Michael Finley, Dirk Nowitzki, Tim Duncan, and Jermaine O'Neal.
[7] In 2003, Harrison was promoted to a national marketing role with Nike, where he worked with prominent basketball stars like Michael Jordan and Kobe Bryant.
[7] Over his 19 years at Nike, Harrison became known for his trustworthiness and ability to develop personal connections, making him a popular figure with NBA players.
[9] On June 28, 2021, Harrison was appointed as the general manager and president of basketball operations for the Dallas Mavericks, succeeding Donnie Nelson.
[19][20][21][22] Harrison defended the trade, stating "defense wins championships" and adding that Anthony Davis exemplifies the culture the Mavericks' front office is trying to create.