Johnny Weissmuller took up swimming in an attempt to build stamina after contracting polio as a youngster. He won five Olympic gold medals before finding Hollywood stardom.
Unable to get a job as a New York City policeman, Mel Sheppard focused on training for The Olympics and won four gold medals and one silver as a middle-distance runner.
After serving in the U.S. Army in World War I, Charley Paddock participated in three Olympic Games, winning two gold medals and two silver. He died in a plane crash while serving in World War II.