A former National Basketball Association (NBA) player for the Indiana Pacers, he was a member of the Beijing Ducks for the 2008–09 season[1] and played with the Guangdong Southern Tigers[2] for the next two years.

Harrison was expected to be the #2 or maybe even #3 center in the Pacers' depth chart for his rookie year of 2004–05, behind Jeff Foster and Scot Pollard.

However, due to injuries to Pollard and the suspensions of Jermaine O'Neal, Stephen Jackson and Ron Artest, he became a starter at a much earlier part of his career than most people anticipated.

Harrison was charged with one count of assault and battery for his involvement in the Pacers–Pistons brawl at The Palace of Auburn Hills on November 19, 2004, though he was not penalized by the league for the incident.

Harrison also has a small mobile game application company, Kage Media Groups LLC, but he lacks the funding to make this a profitable means for him and his family.

[5] On September 14, 2015, Harrison decided to return to basketball and signed with the Las Vegas Dealers of the upcoming AmeriLeague.