United States Anti-Doping Agency is UFC’s partner agency that keeps a check on unlawful substance use by athletes in the promotion. Recently, the USADA released a press brief, announcing a four-year ban on UFC lightweight and welterweight fighter Michel Prazeres. Meanwhile, post receiving the ban, the veteran has retired from the promotion.

On December 23rd, USADA released a press brief in which it announced that ‘Trator’ has accepted a four-year ban. Reportedly, his first violation case was reported back in 2019. Here, he received a two-year ban on grounds of testing positive for Boldenone.

“Prazeres, 40, tested positive for clomiphene and its metabolites (desethyl-clomiphene, clomiphene M1, and clomiphene M2), oxandrolone metabolites, and the exogenous administration of testosterone and/or its precursors as the result of urine samples collected out-of-competition on August 27, 2021, September 16, 2021, October 15, 2021, and November 2, 2021,” USADA wrote in its report.

Interestingly, the forty-year-old had gotten tested through a technique called Carbon Isotope Ratio (CIR). Notably, this test differentiates between anabolic steroids naturally produced by the body or ones got through external agents.

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The four-year ban on Michel Prazeres began on August 27th when USADA collected his first urine sample.

Michel Prazeres hits back at USADA

After the ban, Michel Prazeres would not have returned to the UFC until 28th August 2025. Meanwhile, the veteran told USADA that he wasn’t taking performance-enhancing drugs. Instead, they were medications that his doctor suggested for a fertility treatment.

“I told USADA everything. I said my wife and I were doing treatment to have another baby, This is not a steroid, this is a medication. They interviewed me, my wife and my doctor, they took all the receipts and medical records, the exams I’ve done, and these sons of b*tches still do that?” Prazeres told MMA Fighting

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However, the veteran has now taken a different path, as USADA doesn’t function in Brazil’s jurisdiction. He will now go back to working as a police officer in Brazil. Plus, he will continue his MMA career in his home country.

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