Related Clues:

• Spinks defeater, 1978
• Ultimate
• Foreman's superior
• The People's Champ
• Champ of 10/30/74
• See 28-Down
• To the ___ degree
• Loser to Norton, 1973
• The Lion of God
• 'When We Were Kings' subject
• Subject of a 1996 Oscar-winning documentary
• Mathematician's ordinal
• Last in line, usually
• The highest degree
• Maximum