Munguia cleared to resume after postfight test contamination ruled accidental

Jaime Munguia has been cleared to resume his boxing career after British and international anti-doping authorities concluded that a positive postfight test following his May rematch with Bruno Surace was caused by accidental contamination, not deliberate use of a banned substance. The British Boxing Board of Control, acting through UK Anti-Doping, and the World Boxing Council said there will be no charges, sanctions, or suspension, and Munguia’s unanimous decision victory from the May 3-4 bout in Riyadh will stand.

Munguia, 28, initially tested positive for exogenous testosterone metabolites after the rematch, and both his A and B samples returned adverse findings, prompting an investigation and widespread scrutiny. According to reports, the adverse results were first flagged by independent testing organizations and led the BBBofC to appoint UKAD to handle testing, investigation and results management. Munguia and his camp immediately disputed the findings, saying contamination of supplements explained the result.

In a statement posted on social media, Munguia thanked the WBC and anti-doping authorities and said independent analyses showed the positive finding was a false...