Parker Attributes Positive Drug Test to Nutritionist's Cocaine Use

Former heavyweight champion Joseph Parker has maintained that the positive drug test which led to his suspension from boxing was not the result of his own actions, but rather stemmed from exposure to cocaine used by his nutritionist, according to a statement from UK Anti-Doping (UKAD). The New Zealand fighter tested positive for benzoylecgonine, a primary metabolite of cocaine, after a routine UKAD screening that took place shortly after his unexpected defeat to Fabio Wardley in London on 25 October 2025. The finding was recorded as an adverse analytical finding (AAF) and triggered an immediate provisional suspension that could have lasted up to two years. Parker has consistently denied any personal use of prohibited substances throughout the investigation.

On Wednesday he announced that the suspension had been lifted and that he intended to return to the ring in the near future. The following day UKAD confirmed that Parker was cleared to resume his boxing career, releasing details of the case that included the 34‑year‑old’s explanation for the AAF. In a formal UKAD statement the agency noted: "On 6 March 2026, Mr Parker supplied UKAD with evidence asserting that the AAF resulted from his exposure to cocaine used by the nutritionist he employed in preparation for the bout on 25 October 2025. The nutritionist admitted to being a regular cocaine user and said he had consumed the drug daily during the week leading up to the fight.

Between 14 April 2026 and 3 June 2026, UKAD requested further information from Mr Parker concerning his explanation for the AAF. Among other details, Mr Parker disclosed that he had first begun working with the same nutritionist in April 2023." UKAD explained that after reviewing the evidence, it decided to impose a three‑month period of ineligibility, which it considered already served, because an independent scientific expert concluded that any cocaine ingestion had taken place out of competition and therefore was unrelated to sporting performance.

The agency added: "On 15 June 2026, UKAD received an independent scientific expert opinion from its instructed expert, which concluded that Mr Parker's ingestion of cocaine most likely took place out of competition (i.e., before 11:59 p.m. on 24 October 2025).

On 22 June 2026, UKAD confirmed to Mr Parker that, in light of the expert’s opinion, it was satisfied that any ingestion of cocaine occurred out of competition and was therefore unrelated to sport performance. Consequently, UKAD lifted Mr Parker's provisional suspension on that date, allowing him to resume participation in sport with immediate effect, and proposed a three‑month period of ineligibility (deemed served) as the sanction for his anti‑doping rule violation." The expert’s report suggested that the most plausible source of the benzoylecgonine in Parker’s urine was contamination from food handled by the nutritionist, who had openly admitted to cocaine use.

However, the expert also cautioned that they could not completely rule out the possibility that the finding represented the tail end of a larger, pharmacologically active dose of cocaine. The report stated: "It is also my opinion that Mr Parker's administration of cocaine may have occurred orally from food contaminated with cocaine by his sports nutritionist who has admitted being a user of cocaine, giving rise to the finding of benzoylecgonine in Mr Parker's urine samples. I cannot exclude the possibility that the finding of benzoylecgonine has arisen as the tail end of the administration of a larger pharmacologically active dose of cocaine." As a result of the anti‑doping ruling, the outcome of Parker’s fight with Wardley – originally recorded as an 11th‑round stoppage victory for the British boxer – has been changed to a loss by disqualification rather than a knockout.

Parker, who lost his world title to Anthony Joshua in 2018, entered the Wardley bout arguably in the best shape of his career. After a heavy defeat to Joe Joyce in 2022, he rebounded with six consecutive wins, including high‑profile victories over Deontay Wilder and Zhilei Zhang, and captured the WBO interim heavyweight title.

He was slated to challenge then‑IBF champion Daniel Dubois in February, but Dubois fell ill days before the scheduled fight, prompting a reshuffle of Parker’s plans. Ultimately, Parker chose to risk his status as the WBO mandatory challenger to undisputed champion Oleksandr Usyk by taking the fight against Wardley, a gamble that did not pay off.

The broader boxing community has taken note of the case, as it raises questions about the responsibilities of support staff and the potential for inadvertent doping violations. While UKAD’s decision to deem the suspension served acknowledges the out‑of‑competition nature of the exposure, it also underscores the importance of strict oversight of all individuals involved in an athlete’s preparation.

Parker’s reinstatement paves the way for him to seek redemption in the ring, and he has indicated that a return fight is imminent, though no opponent has yet been confirmed. The incident also highlights the complex interplay between anti‑doping regulations and real‑world scenarios where athletes may be unintentionally exposed to prohibited substances. UKAD’s reliance on expert scientific opinion illustrates the agency’s commitment to nuanced, evidence‑based judgments rather than blanket punitive measures.

For Parker, the episode serves as a cautionary tale about the need to vet the personal habits of those who manage his nutrition and training, ensuring that no external factor jeopardizes his career. In the coming months, fans and analysts will be watching closely to see how Parker rebuilds his reputation and whether he can secure another title shot. The heavyweight division remains crowded with talent, and a cleared Parker could once again become a central figure in the sport’s narrative, provided he navigates the aftermath of this controversy with prudence and focus.