Ben Askren
For a decade, Askren was one of the best welterweight MMA fighters in the world outside of the UFC. He won the Bellator and ONE Championship titles before he finally entered the top U.S. promotion. However, he was past his prime and suffered mixed results despite building his profile.
After he retired from MMA he agreed to box Jake Paul as the YouTuber’s first true combat sports opponent. Many fans hoped that Askren would demolish the upstart but that’s not what happened. Paul knocked Askren out in controversial circumstances and many people called it a fix (via Asia Net).