What is the answer to the crossword clue „Boxer from the 50s who is the only world heavyweight champion in professional boxing to retire undefeated: 2 wds.“. We have found 1 Answers for: „Boxer from the 50s who is the only world heavyweight champion in professional boxing to retire undefeated: 2 wds.“. Try to find some letters, so you can find your solution more easily.