Unbelievable Wins: 15 Underdog Triumphs That Shocked the Sports World

Rulon Gardner Beats Aleksandr Karelin (2000)

In the 2000 Summer Olympics, American wrestler Rulon Gardner faced off against Russian Aleksandr Karelin, who had been undefeated for 13 years. Gardner was not expected to pose a serious challenge but stunned the world by defeating Karelin and winning the gold medal.