Shayna Louise Jack (born 6 November 1998) is a retired Australian swimmer. She won gold medals in Women's 4 × 100 metre freestyle relay and Women's 4 × 200 metre freestyle relay at the 2024 Paris Olympics.
From 2019 to 2021, Jack served a 24-month competition ban for an anti-doping rule violation relating to unintentional use of Ligandrol.
Early life Jack was born in Brisbane. She started swimming at the age of 18 months, after her parents thought it would be helpful to teach her and her siblings how to be safe in water. She grew to enjoy the experience and at age 10, told her parents she wanted to be an Olympian.
Career
2014: Double Junior Pan Pacific champion at 15 years of age At the 2014 Junior Pan Pacific Swimming Championships, held in August in Kihei, United States, 15-year-old Jack won a gold medal in the 4×100 meter freestyle relay with a Championships record time of 3:39.73, the gold medal in the 100 meter freestyle with a 54.82, the silver medal in the 200 meter freestyle with a 1:59.48, a silver medal in the 4×200 meter freestyle relay, and placed fifth in the 50 meter freestyle.Hy-Tek (31 August 2014). "2014 Jr Pan Pacific Swimming Championships: Results". swmeets.com. Retrieved 24 August 2022.
2019–2021: Positive doping test and suspension Jack pulled out of the 2019 World Aquatics Championships days before it started, citing "personal reasons". It was later revealed that Jack had tested positive for the anabolic agent ligandrol, which is popular with bodybuilders, during an out-of-competition test held by the Australian Sports Anti-Doping Authority (ASADA); a follow-up sample further confirmed the banned substance in her system, and she was subsequently suspended by Swimming Australia and investigated by ASADA. "During a world swimming titles campaign highlighted by Mack Horton's anti-doping stance, Australia's Shayna Jack has tested positive for a banned substance." She posted on Instagram saying that she "would never intentionally take a banned substance that would disrespect my sport and jeopardise my career". The investigation by ASADA was ongoing as of 29 July 2019. "Queensland swimmer Shayna Jack announced on Sunday that she had tested positive for anabolic agent Ligandrol – which is popular with bodybuilders – in late June and that a follow-up sample has confirmed the banned substance."
The result of the investigation was unintentional ingestion of ligandrol by Jack and a 24-month suspension by the Court of Arbitration for Sport running from 12 July 2019 through 11 July 2021 for the anti-doping rule violation.OlympicTalk (16 November 2020). "Shayna Jack, Australian swimmer, banned 2 years in doping case". NBC Sports. Retrieved 20 January 2022. In September 2021, after Jack served the entirety of the imposed suspension, the Court of Arbitration for Sport upheld the suspension as served in full when challenged by Sport Integrity Australia and that Jack could return to competition."Shayna Jack free to resume swimming after court dismisses appeal against reduced doping ban". The Guardian. 16 September 2021. Retrieved 20 January 2022.
2022: Return to competition
2022 Australian Swimming Championships In May, at the 2022 Australian Swimming Championships, held in Adelaide, Jack achieved 2022 World Aquatics Championships and 2022 Commonwealth Games qualifying times in two individual events, winning the 50 metre freestyle with a time of 24.14 seconds, and placing second in the 100 metre freestyle behind Mollie O'Callaghan with a time of 52.60 seconds.Hy-Tek (22 May 2022). "2022 Australian Swimming Championships". Swimming Australia. Retrieved 22 August 2022.
2022 World Aquatics Championships At the 2022 World Aquatics Championships, with swimming competition contested at Danube Arena in Budapest, Hungary in June, Jack won her first medal of the championships in the 4×100 metre freestyle relay, splitting a 52.65 for the fourth leg of the relay to help win the gold medal in a final time of 3:30.95.FINA (18 June 2022). "19th FINA World Championships Budapest (HUN): Women's 4x100m Freestyle Final Results". Omega Timing. Retrieved 18 August 2022. She won her second and final medal three days later in the 4×100 metre mixed medley relay, swimming the freestyle portion of the finals relay in 52.92 seconds to contribute to the silver medal-winning time of 3:41.34 along with finals relay teammates Kaylee McKeown (backstroke), Zac Stubblety-Cook (breaststroke), and Matthew Temple (butterfly).FINA (21 June 2022). "19th FINA World Championships Budapest (HUN): Mixed 4x100m Medley Relay Final Results". Omega Timing. Retrieved 18 August 2022.
2022 Commonwealth Games In the 4×100 metre freestyle relay at the 2022 Commonwealth Games, held in Birmingham, England, Jack helped win the gold medal in a time of 3:30.64 by splitting a 52.72 for the second leg of the relay in the final."Birmingham 2022 Commonwealth Games: Women's 4x100m Freestyle Relay Final Results". Longines. 30 July 2022. Retrieved 18 August 2022. For the 50 metre freestyle, she swam a time of 24.36 seconds in the final to win the bronze medal, securing the final podium spot by finishing 0.42 seconds ahead of fourth-place finisher Emma Chelius of South Africa."Birmingham 2022 Commonwealth Games: Women's 50m Freestyle Final Results". Longines. 31 July 2022. Retrieved 18 August 2022. In the 100 metre freestyle, she finished 0.25 seconds behind gold medalist Mollie O'Callaghan with a time of 52.88 seconds to win the silver medal."Birmingham 2022 Commonwealth Games: Women's 100m Freestyle Final Results". Longines. 2 August 2022. Retrieved 18 August 2022. On 10 August, following her medal-winning performances at the 2022 Commonwealth Games, Jack was named to the 2022 Duel in the Pool roster for Team Australia."Games Stars Return to Finalise Duel Squad". Swimming Australia. 10 August 2022. Retrieved 18 August 2022.
2023: Australian Swimming Championships At the 2023 Australian Swimming Championships, in Gold Coast, Queensland, Jack won the silver medal in the 100-metre freestyle with a 2023 World Aquatics Championships qualifying time of 52.64 seconds, finishing 0.01 seconds behind gold medalist Mollie O'Callaghan and 0.58 seconds ahead of the next-fastest competitor. On the second day, she won the gold medal in the 50 metre freestyle with a World Championships qualifying time of 24.45 seconds. On the fourth of four days, she won the bronze medal in the 200 metre freestyle with a 1:55.37."Meet Results: 2023 Australian Swimming Championships". Swimming Australia. 17 April 2023. Retrieved 17 April 2023.
Two months later, Jack won the B Final of the 200-metre freestyle at the 2023 Australian Swimming Trials with a time of 1:56.82."Meet Results: 2023 Australian Swimming Trials". Swimming Australia. 15 June 2023. Retrieved 15 June 2023.
2024: Paris Olympics Jack qualified for four events at the 2024 Paris Olympics. She won gold medals in the Women's 4 × 100 metre freestyle relay and Women's 4 × 200 metre freestyle relay. Individually, she finished 8th in the 50 m freestyle and 5th in the 100 m freestyle.
2026: Final year In June 2026, she was selected to represent Australia at the 2026 Commonwealth Games. On 14 July 2026, Jack announced that she will retire from competitive swimming upon the conclusion of the Commonwealth Games. During the Commonwealth Games she won gold medals in the 4 × 100 metre freestyle relay and 4 × 100 metre mixed freestyle relay. She also won a bronze medal in the 100 metre freestyle.
Television appearances In 2020, Jack participated on Seven Network's reality program SAS Australia.(2 October 2020) Media Release: SAS Australia's full line up and air date revealed, TV Blackbox. Retrieved 2 October 2020.
In 2025, she participated on Network 10's reality series I'm a Celebrity...Get Me Out of Here! for its 11th season.
Personal life Jack is engaged to Australian field hockey player Joel Rintala. She was awarded a Medal of the Order of Australia in 2025 for her service to sport as a gold medallist at the 2024 Paris Olympic Games.
Jack's younger brother, Jamie, is also a swimmer.
World records Long course metres No. Event Time Meet Location Date Status Ref 1 4x100 m freestyle relay 3:30.05 2018 Commonwealth Games Gold Coast, Queensland 5 April 2018 Former 2 4×100 m freestyle relay 3:27.96 2023 World Aquatics Championships Fukuoka, Japan 23 July 2023 Current 3 4x200 m freestyle relay 7:37.50 2023 World Aquatics Championships Fukuoka, Japan 27 July 2023 Current 4 4x100 m mixed freestyle relay 3:18.83 2023 World Aquatics Championships Fukuoka, Japan 29 July 2023 Former split 54.03 (1st leg); with Bronte Campbell (2nd leg), Emma McKeon (3rd leg), Cate Campbell (4th leg) split 51.69 (2nd leg); with Mollie O'Callaghan (1st leg), Meg Harris (3rd leg), Emma McKeon (4th leg) split 1:55.63 (2nd leg); with Mollie O'Callaghan (1st leg), Brianna Throssell (3rd leg), Ariarne Titmus (4th leg) split 51.73 (3rd leg); with Jack Cartwright (1st leg), Kyle Chalmers (2nd leg), Mollie O'Callaghan (4th leg)
Olympic records Long course metres No. Event Time Meet Location Date Age Status Notes Ref 1 4x100 m freestyle relay 3:28.92 2024 Summer Olympics Paris, France 27 July 2024 25 Current
split 52.35 (2nd leg); with Mollie O'Callaghan (1st leg), Emma McKeon (3rd leg), Meg Harris (4th leg)
References
External links
Shayna Jack at the Paris 2024 Summer Olympics (archived, alternate link)