Rocky Marciano
Marciano was named fighter of the year by Ring Magazine three times. His three championship fights between 1952 and 1954 were named fights of the year by that magazine. Marciano's last title fight was against Archie Moore on September 21, 1955. Marciano was knocked down in the fight, but he got up and knocked out Moore in the 9th round. Marciano announced his retirement in a press conference on April 27, 1956.