Wikipedia:Today's featured article/March 3, 2017

Ian O'Brien (born 3 March 1947) is a former breaststroke swimmer for Australia who won the 200 metre breaststroke at the 1964 Summer Olympics in Tokyo in world record time. In 1962 at the age of 15 he competed in his first national championships, winning the 220 yard breaststroke. At the 1962 British Empire and Commonwealth Games in Perth, Western Australia, he won both the 110 and 220 yd breaststroke and the 4 &times; 110 yd medley relay. He won both breaststroke events at the 1963 Australian Championships, repeating the feat for the next three years. After winning his gold medal at the Tokyo Olympics, he added a bronze in the medley relay. O'Brien successfully defended both his breaststroke titles at the 1966 British Empire and Commonwealth Games in Kingston, Jamaica. He won five Commonwealth Games gold medals and claimed a total of nine individual and six relay titles at the Australian Championships. He retired from the sport at the age of 21, worked for 10 years as a television stagehand, and later launched a company that produced television documentaries. In 1986 he was inducted into the Sport Australia Hall of Fame.