Harrison has been training in martial arts since he was 12 years old. He earned his black belt in Kazuma Kai Karate and a black belt in Aikido as well. Whilst training in aikido his teacher introduced him to submission wrestling which he learned from Lou Thez.
In 2000 he helped start the first Tallahassee fight club where he got introduced to No Gi Jiu Jitsu. Shortly after in 2005, he helped start Tallahassee’s first MMA school(Tallahassee Mixed Martial Arts) with Josh Odom, a competitive training partner of UFC legend Frank Shamrock. Since 2009, Harrison has been regularly teaching No Gi/Submission Wrestling at World Triumph Martial Arts.