Cassius Clay-Sonny Liston Fight 50th Anniversary: Clay (Ali) wanted to quit after balm on Liston's injured shoulder got in Clay's eyes, but Liston quit because of shoulder [VIDEO]

Cassius Clay, better known as Muhammad Ali, knocked out Sonny Liston in the sixth round of their heavyweight championship fight 50 years ago. Liston was the original Mike Tyson (of his early days), but Clay's mimicking of a professional wrestler helped him get inside Liston's head.