On June 20, 1970, in Dallas, Texas, Lewis defended his United States Kickboxing Association heavyweight title against "Big" Ed Daniel at the U.S.A. Professional Open Karate Championships promoted by Lee Faulkner and Allen Steen. Daniels had a background in professional wrestling, and amateur boxing, as well as having received his black belt from Lewis' original teacher and being a police officer at the time. He also enjoyed a vast weight and size advantage over Lewis. In a veritable David vs Goliath bout, Lewis knocked out Daniel in 2 rounds. In a later rematch, Lewis KO'd Daniel in 3 rounds.