He was upset by Leon Spinks
Else clues• '60s and '70s heavyweight champ
• It's hard to be humble when you're as great as I am speaker
• Boxer born January 17, 1942
• Boxing gold-medallist
• Cassius Clay
• Laila's dad
• Pugilist
• Self-proclaimed astronaut of boxing
• Sports Illustrated's Sportsman of the 20th Century
• Subject of the tome GOAT
• Three-time heavyweight champion known as The Greatest: 2 wds.