Other wrestlers who were recognized as the only major World Champion following Gotch's retirement were Earl Caddock, Joe Stecher, Ed "Strangler" Lewis, Stanislaus Zbyszko, and Wayne Munn. The championship became disputed in the late 1920s, and remained that way for over 20 years, when several major World Heavyweight Championships split from the primary title (namely, Boston's American Wrestling Association World Heavyweight Championship, the National Boxing Association (later, National Wrestling Association) World Championship of Wrestling, and the New York State Athletic Commission World Heavyweight Championship). Other governing bodies would create their own version of the World Championship in the 1930s and 1940s, as well.