Preston Hartzog defeated Wesley Correira by a three round split decision in a Mixed martial arts fight on November 14, 2000.^[15] The fight occured in Honolulu,Hawaii at the Neal S. Blaisdell Center.

Correira was in four Ultimate Fighting Championship events from 2002 to 2004.^[12][13] He beat Eric Esch in a K-1 kickboxing match in 2008.Hartzog was a member of the U.S. Army World Class Athlete Program on Fort Carson in Colorado Springs, Colorado in 1999. Hartzog was only stopped once in the course of the action in his amateur and professional career, by Matthew E. O'Neil in a USA Boxing sanctioned match in 1999.^[11] Hartzog went on to compete in seventeen professional boxing matches, winning fifteen of them.^[14] He had a draw with Patrick Smith (fighter) in 2004.