|Born||6 November 1998|
Jack pulled out of the 2019 World Aquatics Championships days before it started, citing "personal reasons". During the championships it was revealed the Australian Sports Anti-Doping Authority (ASADA) found an adverse result in an out-of-competition test and that Jack was being investigated. She posted on Instagram saying that she "would never intentionally take a banned substance that would disrespect my sport and jeopardise my career". The investigations by ASADA are ongoing, with the banned substance in question being revealed to be Ligandrol.
- "2017 World Aquatics Championships > Search via Athletes". Budapest 2017. Retrieved 29 July 2017.
- Final results, Women's 4 × 100 metre freestyle relay
- Final results, 4 × 100 metre mixed medley relay
- Final results, Women's 4 × 200 metre freestyle relay
- "Shayna Jack: Australian swimmer tests positive for banned substance". 27 July 2019. Retrieved 27 July 2019.
- "Australian swimmer Shayna Jack 'tests positive' for banned substance". The Sydney Morning Herald. Retrieved 27 July 2019.
- "Australian swimmer tests positive for banned substance". 9News. Retrieved 27 July 2019.
- "ASADA warned athletes about rise in Ligandrol use in December". The Sydney Morning Herald. Retrieved 28 July 2019.
- "Shayna Jack: The swimming scandal that has embarrassed Australia". BBC News. Retrieved 29 July 2019.