06/20/1960 - Floyd Patterson (Second reign)

After a series of defenses against fringe contenders (Hurricane Jackson, Pete Rademacher, Roy Harris,[9] and Brian London), Patterson met Ingemar Johansson of Sweden, the number one contender, in the first of three fights. Johansson triumphed over Patterson on June 26, 1959, with the referee Ruby Goldstein stopping the fight in the third round after the Swede had knocked Patterson down seven times. Johansson became Sweden’s first World Heavyweight Champion, thus becoming a national hero as the first European to defeat an American for the title since 1933.

Patterson knocked out Johansson in the fifth round of their rematch on June 20, 1960, to become the first man in history to regain the Undisputed World Heavyweight Championship. Johansson hit the canvas hard, seemingly out before he landed flat on his back. With glazed eyes, blood trickling from his mouth and his left foot quivering, he was counted out. Johansson lay unconscious for five minutes before he was helped onto a stool.