Essendon’s supplements scandal began as an attempt to give the AFL club a competitive edge. After coach James Hird took over in 2011, high-performance coach Dean Robinson brought in sports scientist Stephen Dank, who designed an aggressive recovery program involving subcutaneous injections, pills and intravenous vitamin drips. Thirty-eight players consented to participate after being told the substances were approved by Australia’s anti-doping authorities. The program included AOD-9604, colostrum, Tribulus and an ambiguously labelled substance called only “thymosin”; the Court of Arbitration for Sport later concluded that the thymosin was the prohibited peptide thymosin beta-4. Club doctor Bruce Reid warned Hird and administrator Paul Hamilton in January 2012 that Dank was operating at the edge of legality, that the medical benefits and side effects were poorly understood, and that the arrangement could badly damage the club. Despite an agreement that Reid’s approval would be required, evidence indicated that he was largely excluded from the process. Players also testified that at least some injections continued after administrators directed Dank to stop in May 2012, with treatments reportedly continuing into July. Dank was dismissed in September 2012 after unauthorised spending, while Essendon’s season collapsed from an 8–1 start to an 11–11 finish. That decline was not accepted as proof of drug effects, but CAS noted that it was at least consistent with the program’s timeline. Captain Jobe Watson won the 2012 Brownlow Medal, only to have the award stripped after the doping case.
Essendon reported itself to the AFL and the Australian Sports Anti-Doping Authority on 5 February 2013, amid an Australian Crime Commission report warning of expanding steroid use, illegal supplements and organised crime in Australian sport. An interim investigation found severe governance and duty-of-care failures even before determining whether players had received a banned drug. The AFL fined Essendon A$2 million, expelled it from the 2013 finals, and suspended Hird for the 2014 season; general manager Danny Corcoran was also suspended, while doctor Bruce Reid eventually had the charges against him withdrawn. In 2014, ASADA issued show-cause notices to 34 players, alleging administration of thymosin beta-4 during the 2012 season. The AFL Tribunal initially found all of them not guilty, but WADA appealed to CAS. On 12 January 2016, CAS overturned the decision and found the 34 players guilty, imposing two-year suspensions; the verdict was unsuccessfully challenged in Switzerland. Seventeen active players consequently missed the entire 2016 AFL season. The affair remains one of Australian sport’s most consequential doping cases because it combined experimental medicine, inadequate record-keeping, secrecy around injections, institutional failures and a prolonged dispute over whether the players—or the club’s medical and performance staff—should bear responsibility.
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