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05:17 — Leon Spinks defeated Muhammad Ali to win the heavyweight crown on February 15th, 1978. That was the last time the two fighters squared off in primetim (more…)
02:29 — Boxers George Chuvalo, Ron Lyle, Leon Spinks, Larry Holmes and other fighters discuss their experiences in the ring with Muhammad Ali.
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Here's how everything changed in "Chapter 6"