The Cronulla-Sutherland Sharks supplements saga was a sports controversy which began in 2011. The Cronulla-Sutherland Sharks, a professional rugby league club playing in the National Rugby League (NRL), was investigated starting in February 2013 by the Australian Sports Anti-Doping Authority (ASADA) and the World Anti-Doping Agency (WADA) over the legality of its supplements program during the 2011 NRL season and the preceding preseason. In August 2014, the players were found guilty of having used the banned peptide CJC-1295, resulting in the suspensions of fourteen players who were part of the program.
The process had serious ramifications and adverse effects on the football club as a whole. A number of senior staff were either dismissed or resigned, matches were played at a sub-par standard as players were physically, emotionally and socially affected, and it partially played a role in the club winning the wooden spoon in 2014. Several senior club members, including senior coach Shane Flanagan and trainer Trent Elkin, received penalties and suspensions.
Senior staff no longer at the club due to the controversy include Damian Irvine (former chairman), Bruno Cullen (former CEO), Darren Mooney (former football manager), Mark Noakes (head trainer) and Trent Elkin (former club trainer), among others.
Shane Flanagan's suspension expired on 31 October 2014, whilst Trent Elkin is not allowed to work at another NRL club as part of his punishment.
In February 2013, the Cronulla-Sutherland Sharks were implicated in the Australian Crime Commission (ACC)'s report "Organised Crime and Drugs in Sport". The club conducted its own investigation into allegations of illegal performance-enhancing substance use but also awaited findings from Australian Sports Anti-Doping Authority (ASADA)'s investigation. This came a week after the AFL's Essendon Football Club asked ASADA to investigate concerns over the club's possible use of prohibited supplements during the 2012 AFL season.