3. Robert Drysdale
(100% Drug Test Failure Rate)
Robert Drysdale has only ever fought in the UFC once, but he’s failed 2 drug tests while with the promotion. He’s averaging 2 drug test failures for every fight, that’s not a good ratio.
He was supposed to make his UFC debut in 2013, however a flunked drug test delayed things. He would finally make his debut the next year. After originally defeating Keith Berish via submission, the result was over-turned as Drysdale had flunked yet another drug test. He was released by the promotion shortly after.