Brazilian UFC middleweight Paulo Costa became the absolute leader in the number of doping tests he passed to USADA. During the 8-year partnership between the promotion and the organization, Costa was tested 135 times. In second place according to this indicator is the current UFC heavyweight champion John Jones (111 tests).
Also rounding out the top five most tested athletes were Kamaru Usman (97), TJ Dillashaw (92) and Amanda Nunes (90).