The UFC’s partnership with the United States Anti-Doping Agency (USADA) is nearing its eighth year. In 2021, USADA tested a total of 744 mixed martial artists a combined 4,259 times. While many athletes were randomly tested less than 10 times, some were tested two dozen – and some others, even more.
Link:
The 10 UFC fighters who were USADA tested the most in 2021 – MMA Junkie