Best known to movie fans as John Rambos stickfighting opponent in Rambo III Harold Diamond in reality is one of Floridas mostfamous pioneers in the sport of American Kickboxing Born Harold Roth he earned the nickname Nature Boy for his long ponytail and a habit of wearing bluejeans into the kickboxing ring In the mid1970s he became the first martial artist to compete in a kickboxing match on Miami Beach Fighting at the Miami Beach Convention Center on South Beach The same center where Muhammad Ali defeated Sonny Liston for the Worlds Heavyweight Boxing Title Roth ran up an impressive undefeated streak all by knockouts He was labeled unbeatable as he knocked out opponents throughout MiamiDade and Broward Counties In 1983 he won a MuayThai Championship and soon after retired with an undefeated record of 170 with 17 knockouts His legendary localfame lead to a Hollywood contract and a name change to Harold Diamond But to south Florida fans he will always be Nature Boy Harold Roth the greatest kick boxer in the states history