Jaime Munguia and his team have issued another statement about his positive test for exogenous testosterone – a banned performance-enhancing drug – in testing done for his May 3 rematch win over Bruno Surace.
The Voluntary Anti-Doping Association, more commonly known as VADA, organized the testing. News of the positive test came out May 29; Munguia has since requested that his B-sample be tested to determine whether it comes up with the same result as his A-sample ().
According to BoxingScene’s Jake Donovan, “Munguia will have to appear before the British Boxing Board of Control, the presiding commission for the event.”
Munguia, 28, is a former junior middleweight titleholder now competing as a super middleweight. In December, in his second bout back after losing to Saul “Canelo” Alvarez in May 2024, Munguia suffered a shocking sixth-round knockout against the naturally smaller and historically lighter punching Surace.
Their rematch came in Riyadh, Saudi Arabia, on the undercard of Canelo’s win over William Scull. Munguia defeated Surace via unanimous decision and moved to 45-2 (35 KOs).
On May 29, the day the news of the positive test broke, Munguia noting that he had never tested positive at any other point in his career, was surprised at this test result, and was willing to demonstrate that he has always been a clean athlete.
On June 2, Team Munguia sent boxing media members a lengthier statement.
“Following Jaime’s initial statement, we want to provide additional clarity in response to speculation and misinformation circulating about his recent VADA test.
“First, it is important to reiterate: Jaime Munguía has never tested positive in over 100 anti-doping tests across his professional career until now. His record speaks for itself. He has always complied with VADA testing protocols and has built a reputation as a clean and respectful fighter who honors the integrity of the sport. “We ask the boxing community to remember that context before rushing to judgment.
“The test in question was one of multiple tests conducted during training camp – all others came back clean. The positive A-sample result was unexpected and deeply concerning to us.
“Exogenous testosterone – like many banned substances – can enter the body in several ways, not solely through intentional use. At this moment, we do not yet know what caused the result.
“We are rigorously reviewing every product Jaime has used, including supplements, pharmaceuticals, treatments, and anything else that could be relevant. This is a meticulous process, and we are committed to uncovering how this substance may have entered his system.”
Munguia’s positive test also led many to note that he was not the first fighter trained by Eddy Reynoso to test positive for PEDs. Canelo is foremost among them, though he argued that his positive test for clenbuterol came from that substance’s .
“We also want to clarify that Eddy Reynoso serves only as Jaime’s trainer,” the second statement read. “He is not involved in Jaime’s nutrition, supplementation, or medical oversight. Likewise, no one on Canelo Alvarez’s team has any role in overseeing Jaime’s regimen or is in any way responsible for this situation. Any implication that Reynoso or anyone associated with Canelo’s team bears responsibility is entirely unfounded and unfair.
“The only person responsible for overseeing Jaime’s supplements and vitamins is Marco Antonio Perez Espinoza, who has worked with Jaime since nearly the beginning of his professional career. This is the first time Marco has ever been connected to a situation of this nature, and is fully cooperating in the current review process.”
Munguia’s second statement says they are waiting for more information – and asks boxing fans to do the same.
“We have not been informed of the exact levels detected in the initial test, which is a critical piece of information, nor have we received the result of the B-sample, which is currently pending.
“While we wait, we urge the public and the media to avoid drawing premature conclusions based on incomplete information. One thing we know for certain: Jaime is not a cheater. He did not knowingly or intentionally take anything that would violate anti-doping regulations. To suggest otherwise is not only inaccurate, but deeply unfair to a fighter who has always operated with professionalism, integrity, and respect for the sport. He has been a consistent advocate for clean boxing and has personally insisted on VADA testing throughout his career because he understands that in a contact sport, the use of performance-enhancing drugs can have serious, even dangerous, consequences.
“There have been several instances across sports where athletes have been cleared after demonstrating that contamination – whether due to human error or tainted products – was the cause, and that there was no intent to cheat. We are hopeful that a thorough review will bring similar clarity to this situation.
“We recognize that the responsibility for ensuring full VADA compliance ultimately lies with Jaime and our team. We take that responsibility seriously and are actively reviewing every detail with the utmost diligence, working alongside experts and relevant authorities, to understand what occurred and find the source of the substance detected.
“We will share updates when we have more information. In the meantime, we ask for patience, fairness, and understanding. Jaime Munguía remains committed to clean competition and will cooperate fully with this process until it is resolved.”
David Greisman, who has covered boxing since 2004, is on Twitter. David’s book, “,” is available on Amazon.