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Statement on Jesse Ronson

USADA announced today that Jesse Ronson, of London, Ontario, Canada, has accepted a 20-month sanction for a violation of the UFC® Anti-Doping Policy.

Ronson, 34, tested positive for metabolite of metandienone (18-nor-17β-hydroxymethyl-17α-methylandrosta-1,4,13-triene-3-one) as the result of a sample collected out-of-competition on July 22, 2020. Metandienone (also known as methandienone) is a non-Specified Substance in the class of Anabolic Agents and is prohibited at all times under the UFC Anti-Doping Policy and UFC Prohibited List.

Upon being added to the UFC Anti-Doping Program, athletes are required to declare all medications and supplements they have used in the previous 12 months. An athlete who declares the prior use of a prohibited substance will not be deemed to have committed a violation but, depending on the substance, may be required to refrain from competition for a period of at least six months and provide at least two negative samples. Ronson did not declare the use of metandienone on his onboarding declaration forms.

Ronson received a reduction to the period of ineligibility for his Full and Complete Cooperation under the revised UFC ADP announced on November 25, 2019.

Ronson’s 20-month period of ineligibility began on July 22, 2020, the date his positive sample was collected.

USADA conducts the year-round, independent anti-doping program for all UFC athletes. USADA is an independent, non-profit, non-governmental agency whose sole mission is to preserve the integrity of competition, inspire true sport, and protect the rights of clean athletes. In an effort to aid UFC athletes, as well as their support team members, in understanding the rules applicable to them, USADA provides comprehensive instruction on the UFC Anti-Doping Program website ( regarding the testing process and prohibited substances, how to obtain permission to use a necessary medication, and the risks and dangers of taking supplements, as well as performance-enhancing and recreational drugs.

In addition, the agency manages a drug reference hotline, Drug Reference Online (, conducts educational sessions, and proactively distributes a multitude of educational materials, such as the Prohibited List, easy-reference wallet cards, and periodic athlete alerts. Many of the resources available to athletes are provided in multiple languages, including Russian, Spanish, French, Portuguese, Korean, and Japanese.

Full Statement Here