Career
Born in Brighton-Le-Sands, Sydney, Chapman first came to prominence in the 1952 Australian Championships, at the age of 14, when he cut 2.9 seconds off the 440-yard freestyle Australian record. He also claimed gold in the 4×220-yard freestyle relay. In his era, the 220 and 880-yard freestyle were not contested as individual events.
Due to the rise of fellow Australian Murray Rose in distance freestyle swimming, Chapman switched to competing in the 110 yd and 220-yard freestyle events in a bid to increase his chances of success at the 1956 Olympics in Melbourne.
Prior to the games, he defeated team-mate Jon Henricks twice in the 220-yard freestyle, setting a world record on one of those occasions. Due to the 200-metre freestyle not being an Olympic event, Chapman was forced to concentrate on the 100-metre freestyle.
Under the rules of the time, heat swimmers were not entitled to gold medals. Chapman continued in the sport despite this until the 1958 Empire Games in Cardiff, where he was edged out for gold in the 110-yard freestyle by Devitt, and managed to come only fifth in the 440-yard freestyle behind fellow Australian John Konrads.
Chapman collected gold medals in the 4×220-yard freestyle and 4×110-yard medley relays.
Chapman retired after the 1958 Games. In 1978 he and a friend died after a boat belonging to him capsized near Little Bay, New South Wales, in the south of Sydney. Their bodies were never recovered.