The model of the modern super heavyweight, Lewis fought big, with a good jab and huge right hand. Much of his success came from his learning and adapting throughout his career.
2 of 10Hy Peskin/SI
Marciano was the only heavyweight champion to retire undefeated. Seemingly impervious to punishment, the "Brockton Blockbuster" was often outsized, but never outworked.
3 of 10Tony Triolo/SI
Relentless, swarming and implacable with that terrible, swift left hook -- there was no place to hide when Joe was Smokin'.
4 of 10Neil Leifer, John Iacono/SI
Though inelegant at times, Big George was an irresistible offensive force. In 1987, after a 10-year layoff, he returned older and heavier, but smarter than ever and nearly as effective.
5 of 10AP
The "Manassa Mauler" was a ferocious attacking force and pound-for-pound the hardest puncher in heavyweight history. Electrifying in action.
6 of 10Durant Collection/SI
The first black heavyweight champion and the first truly modern champion, Johnson had great speed, power in both hands and was a defensive wizard.
7 of 10John Iacono, Tony Triolo, Joe DiMaggio, Lane Stewart, Manny Millan/SI
His 20 successful title defenses are second only to Louis's 25. With an unmatched jab and tremendous ring smarts, Holmes described his crafty style by saying, "You always got to make somebody drunk before you mug him."
8 of 10Mark Kauffman, John G. Zimmerman/SI
At his peak, Liston was an absolute destroyer (ask Floyd Patterson) and far more complete fighter than he is given credit for.
9 of 10AP
He was the classic boxer-puncher, and the greatest finisher in heavyweight history.
10 of 10Neil Leifer/SI
He's been called "The Greatest" and, you know what? He was. Speed, grace, a transcendent ring intelligence and miraculous resilience made Ali a legend in the ring.
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