Top 10 Boxing Heavyweights in History

Muhammad Ali - He said he was 'The Greatest' and, you know what? He was.

Speed, grace, a transcendent ring intelligence and miraculous resilience made Ali a legend in the ring.

Source:
http://sportsillustrated.cnn.com/multimedia/photo_gallery/1004/boxing.obrien.top.10.heavyweights.all.time/content.1.html