Muhammad Ali (born Cassius Clay) aka "The Greatest," American professional boxer & social activist. Called the Sportsman of the Century, he was a cultural icon & the most famous athlete in the world. He was the 1st & only 3x lineal World Heavyweight Champion. Known for his unorthodox fighting style, he had used catchphrases like "float like a butterfly, sting like a bee," employed techniques such as the Ali Shuffle & the rope-a-dope, and brought beauty, grace & skill to the sport. R.I.P.