John Henry Lewis was a hall of fame American boxer who held the World Light Heavyweight Boxing Title from 1935 to 1938. The Ring boxing magazine named Lewis the 16th greatest light heavyweight of all time. His trainer was Larry Amadee, and his managers included Ernie Lira, Larry White, Frank Schuler and Gus Greenlee.

A knockout is a fight-ending, winning criterion in several full-contact combat sports, such as boxing, kickboxing, muay thai, mixed martial arts, karate, some forms of taekwondo and other sports involving striking, as well as fighting-based video games. A full knockout is considered any legal strike or combination thereof that renders an opponent unable to continue fighting.