The UFC’s partnership with the United States Anti-Doping Agency nears its end, with a scheduled termination as soon as the calendar flips from 2023 to 2024.
In 2023, USADA tested 739 mixed martial artists a combined 4,231 times. While many athletes were randomly tested less than 10 times, some were tested two dozen – and some others, even more. The totals represented 48 more tests and 14 more athletes than in 2022.
With testing data available on USADA’s official website, here are the 12 fighters tested the most from Jan. 1 to Dec. 26, 2023.
Note: There may have been additional data from Dec. 27-31 that has not yet been updated in the USADA database.
Clay Guida, Kamaru Usman – 20
Jessica Andrade, Marlon Vera – 21
Magomed Ankalaev – 22
Jul 30, 2022; Dallas, TX, USA; Magomed Ankalaev (red gloves) before a fight with Anthony Smith (not pictured) in a light heavyweight bout during UFC 277 at the American Airlines Center. Mandatory Credit: Jerome Miron-USA TODAY Sports
US mixed martial arts fighter Jon Jones celebrates after defeating French mixed martial arts fighter Ciryl Gane during their UFC 285 heavyweight title bout at T-Mobile Arena, in Las Vegas, Nevada, on March 4, 2023. (Photo by Patrick T. Fallon / AFP) (Photo by PATRICK T. FALLON/AFP via Getty Images) ORIG FILE ID: AFP_33AK3PQ.jpg
Charles Johnson – 33
LAS VEGAS, NEVADA – NOVEMBER 18: (L-R) Charles Johnson punches Rafael Estevam of Brazil in a flyweight fight during the UFC Fight Night event at UFC APEX on November 18, 2023 in Las Vegas, Nevada. (Photo by Chris Unger/Zuffa LLC via Getty Images)
Paulo Costa – 36
Aug 20, 2022; Salt Lake City, Utah, USA; Paulo Costa (red gloves) reacts after defeating Luke Rockhold (blue gloves) during UFC 278 at Vivint Arena. Mandatory Credit: Jeffrey Swinger-USA TODAY Sports
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