#5: Leon Spinks vs. Muhammad Ali II, 1978
Sure, this match wasn’t The Rumble in the Jungle, but the Leon Spinks vs. Muhammad Ali II match on September 15, 1978, was a huge upset to which 2 billion people tuned in. It was the only time anyone ever bested Ali in a title bout. The 25-year-old underdog Spinks was not at all expected to beat the 36-year-old, three-time heavyweight champion. The following June, Ali submitted his official retirement paperwork to the World Boxing Association.
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