Zac Stubblety-Cook

Izaac Keith Stubblety-Cook (born 4 January 1999) is an Australian swimmer. He is a former world record holder in the long course 200 metre breaststroke.

In 2021, Stubblety-Cook competed in the men's 100m and 200m breaststroke events at the 2020 Summer Olympics in Tokyo, winning a gold medal (and setting an Olympic record) in the latter event. He swam the breaststroke leg in the mixed 4x100m relay in which Australia finished 3rd, winning a bronze medal. He trains under Vince Raleigh at the Chandler Aquatic Centre, Brisbane, Queensland.

Career
Stubblety-Cook started swimming at Wellers Hill Water Ratz, a swimming club in Tarragindi, Queensland. His reason for joining was to participate in the swim program for general water safety. Stubblety-Cook then competed in the heats of the 200m breaststroke.at the 2018 Commonwealth Games, He then competed in the men's 200 metre breaststroke at the 2019 World Aquatics Championships.

He won his first international medal, a silver medal, in the 200m breaststroke, at the 2018 Pan Pacific Championships in Tokyo. He continued to impress at the 2021 Australian Swimming National Championships, taking out two national titles in the 100m breaststroke and 200m breaststroke.

In the 2022 Australia Day Honours, Stubblety-Cook was awarded the Medal of the Order of Australia.

At the 2022 Australian Swimming Championships, held in May in Adelaide, he qualified for the 2022 World Aquatics Championships and 2022 Commonwealth Games in the 100 metre breaststroke and 200 metre breaststroke, setting a new world record in the 200 metre breaststroke in the final with a time of 2:05.95 to break the former record of 2:06.12 set by Anton Chupkov of Russia in 2019.

In 2023, he competed at the World Championships in Fukuoka and finished with a silver medal in the 200 metres breastroke after being 0.92 seconds behind Qin Haiyang, who had broken the world record set by Stubblety-Cook, during that event. He also took part in the 4×100 m mixed medley and 4×100 m medley events, and took silver and bronze respectively.