Joseph Parker tested positive as part of a anti-doping examination administered the very day he fought in 11th-round loss against UK boxer Ipswich-born Wardley.
Wardley along with Joseph Parker were part of a thrilling contest staged in the UK capital on 25 October to decide the identity of the mandatory WBO contender to undisputed world heavyweight champion Oleksandr Usyk.
Joseph Parker had been next in line to meet the champion following stringing together a remarkable six-fight winning streak, however put his shot at the title at stake in the UK and suffered an 11th-round stoppage.
A standard screening administered to the boxer through the anti-doping organization the day he fought showed an adverse result and now leaves the 36-year-old with a battle to demonstrate his cleanliness.
Parker's promotional company published a statement which read: "The agency informed everyone involved regarding Joseph Parker tested positive after a doping test administered on the fight day. As the investigation continues, no further statements are planned at this time."
Parker became world champion six years ago prior to he surrendered his WBO belt by unanimous decision versus British star Joshua in Cardiff in 2018.
Parker remained an active participant in the UK since then, competing in eight bouts altogether on UK territory and moving to Ireland for training camps under highly regarded trainer Andy Lee over the past few years.
Guided by Lee, Parker recovered from his 2022 loss versus British heavyweight Joyce to secure multiple wins positioning him at the front of the line to meet Oleksandr Usyk before he suffered defeat to the British fighter.
Following Parker's sample showed an adverse finding on the day of the Wardley fight, allegedly for cocaine, a probe about the test outcome has commenced.
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Debra Briggs
Debra Briggs
Debra Briggs
Debra Briggs