Back in 2019, former UFC light heavyweight champion Jon Jones was tested by USADA a total of 42 times, much to the surprise of many. According to UFC exec Jeff Novitzky at the time, it was the highest volume of yearly tests he had seen on one athlete in any sport.
In 2019, @JonnyBones was subject to 42 no-notice drug tests by 3 separate entities (USADA, CSAC and NSAC). In my 20 years experience in the anti-doping world, this is the highest volume of yearly tests that I have ever seen on one athlete, in any sport.