4. Vitor Belfort (2)
Vitor Belfort has only failed 2 drug tests throughout his MMA career. Of course, this is because he received prescribed testosterone which was deemed legal for much of his career.
When TRT therapy was no longer legal, Belfort was forced to pull out of a planned title fight with Chris Weidman. He failed a test for elevated testosterone just before the planned bout, but wasn’t suspended as TRT had only recently been banned.
His only previous test failure before then was in 2006, which was also for elevated tesoterone. That test failure came after his loss to Dan Henderson at Pride 32.
