William Alfred Robinson was an English professional wrestler, amateur wrestler, and coach. Robinson was one of the leading practitioners of catch wrestling, a national champion in freestyle wrestling, and a professional wrestling world champion. As a wrestler, Robinson had a successful career in Britain and internationally, especially in Japan. He was known for training professional wrestlers and mixed martial artists in the catch wrestling style, including Josh Barnett, Kazushi Sakuraba, Kiyoshi Tamura, and Shayna Baszler. His favourite saying as a coach was "do it again", which came from his trainer Billy Riley. Robinson acted in several movies including The Wrestler and inspired the fictional manga/anime character Robin Mask.

Kiyoshi Tamura is a Japanese retired professional wrestler and mixed martial artist. Once a student of legendary professional wrestlers Billy Robinson, Lou Thesz and Akira Maeda, Tamura was known for his skills in catch wrestling and is considered to be one of the greatest shoot wrestlers of all time. Competing exclusively in shoot style wrestling, Tamura began his career with UWF Newborn and later joined its successor group UWF International before transitioning to mixed martial arts.