Leonard vs. Hearns I (1981)

Sugar Ray Leonard trailed on all three scorecards after 13 rounds, then unleashed a 14th-round flurry that forced a stoppage against Hearns—erasing a 7-point deficit in the final frame. Leonard landed 43% of his power shots in the final round, nearly double the typical championship rate. This comeback outperforms #3 Ali vs. Foreman in drama, with Leonard absorbing 18 more head punches before turning the tide. The bout grossed over $40 million in 1981 dollars, a welterweight record at the time. Hearns' 8th-round knockdown seemed decisive, but Leonard's grit surpassed the average fighter's recovery ability, securing a victory that redefined welterweight limits.