Mushy Callahan was the 1926–1930 light welterweight world champion of boxing. After retiring from boxing in 1932, Callahan refereed hundreds of matches, and he had a 30-year career in Hollywood, taking small roles in movies, most with boxing themes, as well as working as a stuntman, trainer and boxing adviser on movie sets.

James Bryan Herring, also known as Red Herring, was an American boxer, who claimed the world light welterweight championship in 1925.