If someone said they were going to change their name based off a classic character from a Michael J. Fox movie, I bet your first thought might be Marty McFly, Doc Brown or Biff Tannen.
Cassius Clay - Olympic gold medalist, heavyweight champion, and arguably the best heavyweight ever - announced his conversion to Islam after beating Sonny Liston for the heavyweight title. He was known as Cassius X for a short period of time...
Full Article: The 19 greatest name changes in sports, RANKED
