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Joseph Parker failed drugs test on day of Fabio Wardley fight, promoter confirms

  • On Friday, November 14, the Voluntary Anti-Doping Agency revealed Joseph Parker's fight-night A-sample from October 25 tested positive for cocaine, sparking widespread reaction in boxing.
  • Because cocaine is banned in-competition, the benzoylecgonine metabolite remains detectable for up to four days, and positive tests can result in a multi-year suspension.
  • With the A-sample adverse, Parker has requested B-sample analysis, a fighter's right often exercised though samples commonly match, after his controversial 11th-round stoppage at the O2 Arena.
  • VADA will hand the case to the UK Anti-Doping Agency and British Boxing Board of Control, placing Joseph Parker's career at risk with a potential multi-year suspension looming.
  • Parker's potential 2026 title route is now at risk as the adverse finding jeopardises his chance to challenge undisputed champion Oleksandr Usyk and clouds his recent wins over Deontay Wilder and Zhilei Zhang.
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Former champion boxer Joseph Parker denies taking 'any prohibited substance'

Former heavyweight champion Joseph Parker denied taking any prohibited substance and said his failed drug test from last month’s loss to Fabio Wardley was “a real surprise.”

·United States
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Former heavyweight boxing world champion, New Zealander Joseph Parker, tested positive for a doping test on the day he fought Britain's Fabio Wardley last month.

·Ljubljana, Slovenia
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Woonsocket Call broke the news in on Friday, November 14, 2025.
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