Buster Douglas

American heavyweight boxer best known for pulling off the biggest upset in boxing history — knocking out the undefeated and seemingly invincible Mike Tyson in round 10 in Tokyo in 1990. A 42-to-1 underdog at the time, Douglas delivered a performance for the ages, dropping Tyson for the first time in his professional career. He won the WBA, WBC and IBF heavyweight titles with the victory.