 Thesz traveled to many areas and defeated various champions.He defeated the American Wrestling Association (a Boston-based federation different from Verne Gagne's more famous organization of the same name) World Heavyweight Champion Gorgeous George on July 27, 1950 in a non-title match, and, finally, Baron Michele Leon on May 21, 1952 for the Los Angeles Olympic Auditorium World Heavyweight Championship.In light of having unified three of the major world heavyweight championships of his time (as well as numerous other lesser-prestige titles) and defeating the reigning AWA World Heavyweight Champion in a non-title match (a major title that was abandoned soon after), Thesz became the Undisputed Champion for some time.