Zac Stubblety-Cook

Izaac Keith Stubblety-Cook was born on 4 January 1999 and is an Australian breaststroke swimmer who learned the sport at the Wellers Hill Water Ratz club in Tarragindi, Queensland. He won bronze in the 200 m breaststroke at the 2017 World Junior Championships and silver at the 2018 Pan Pacific Championships. At the Tokyo Olympics he won the 200 m breaststroke in an Olympic record of 2:06.38, and in May 2022 he broke the world record in the event with 2:05.95 at the Australian Championships in Adelaide. He became world champion in the event that year in Budapest and won Commonwealth Games gold in the 200 m breaststroke and the mixed medley relay. He took silver in the 200 m breaststroke at the 2024 Olympics. In October 2024 he moved to Melanie Marshall's program on the Gold Coast, and he withdrew from the 2025 World Championships with a back injury.