Who said "It's not bragging if you can back it up"

• Boxer who said "The man who has no imagination has no wings"
• Comeback victor of 1974
• Zulfikar ___ Bhutto, 1970's Pakistani leader
• Winner of "The Thrilla in Manila"
• Clay's transformation?
• "When We Were Kings" king
• Foreman KO'er, 1974
• Clay, today
• Rope-a-dope exponent

Wikipedia Word definitions in Wikipedia
ALI was the graffiti name of artist and musician Marc André Edmonds , also known as J. Walter Negro , “The Playin’ Brown Rapper.” As ALI, he is best known as the founder of 'Soul Artists' and originator of the cult of Zoo York . As "alter-ego" J. Walter ...