This controversial former UFC heavyweight champion is another fighter whom White said would never fight in the UFC again. While that has obviously been proven false after several years, “The Warmaster” remains a fighter who had firmly supplanted himself on White’s bad side at one point.
The discord centered on Barnett’s three positive tests for performance-enhancing substances (although not all of them were in UFC), for which White claimed he never owned up to. The main offense came when Barnett won the belt from Randy Couture way back in 2002, only to have it stripped following a positive test. White was outraged that Barnett never admitted his mistake, and said he would never fight in the UFC again.
Barnett would go on to have a very successful career outside of the UFC, and the beef was apparently squashed when Barnett finally returned to the UFC in late 2013. But with two losses in his last three bouts at 38 years old, it’s safe to say his career could have been so much more if not for the drug test failures and subsequent beef with White.