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Junior lightweight titleholder Oscar Valdez has tested positive for a diuretic, which is a banned substance, ESPN is reporting.
Valdez’s A-sample, taken by the Voluntary Anti-Doping Association, came back positive. The results of his B-sample have yet to be determined.
The Mexican, coming off his sensational knockout of countryman Miguel Berchelt to win his belt in February, was scheduled to make his first defense against Robson Conceicao on Sept. 10 in Tucson, Ariz.
The positive test places that bout and Valdez’s immediate future in jeopardy.
Diuretics are used for weight loss and, in some cases, to mask the use of other banned substances.
Sources: Oscar Valdez has tested positive for a diuretic, a banned substance. He’s scheduled to defend his 130-pound title vs. Robson Conceição on Sept. 10 in an ESPN+ main event. That was his A-sample. The test was conducted by VADA, part of the WBC Clean Boxing Program.
— Mike Coppinger (@MikeCoppinger) August 31, 2021