About Jon Henricks
John Malcolm Henricks is an Australian Olympic swimmer who won two gold medals at the 1956 Summer Olympics in Melbourne. Henricks set world records in two freestyle events. His coach Harry Gallagher converted him to sprint freestyle events, and he bettered the Olympic record for 100 metres at the 1953 Australian national championships. He held the 100 metres long-course world record for five years, winning gold medals in the 100 metres and 4×200-metre freestyle relay at the 1956 Summer Olympics in Melbourne. During those five years, he lowered the pre-existing record by almost two seconds.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.