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.
Snubbed by the elite Diamond Sculls, Jack Kelly Sr. entered the Antwerp 1920 Olympic Games just to gain a measure of revenge. He did just that, claiming gold medals in the single and double scull.
Duke Kahanamoku introduced a powerful style of swimming, winning five medals (three gold) over three Olympic Games. He then became a surfing ambassador to the world.