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Record (W-L-D): 49-0
Rocky Marciano is the best knockout puncher in boxing history. Many boxing experts try to discredit him and his record because he was a heavyweight during the 1950s, which is considered a weak era in heavyweight boxing. Despite the lack of competition, Marciano still knocked out some legendary boxers.
Some of Marciano’s knockout victims include Joe Louis, Jersey Joe Walcott, Ezzard Charles and Archie Moore. This is actually probably one of the more impressive knockout resumes on this list. Marciano was an undersized heavyweight at 5’11’’ and under 200 lbs. He lacked size, but in my opinion, he was the hardest punching boxer of all time. One questionable story that still lingers in boxing lore is that Marciano’s punching power was tested by the U.S. Army, and the force produced by one of his punches was equal to that of an armor piercing bullet. I’m skeptical of this story, but it makes for a great myth and adds to his legend.
Marciano lacked boxing skill and had mediocre footwork, but his punching power made up for his deficiencies. He didn’t care if he made contact with his opponent’s head or body. His blows would land on their shoulders and forearms, which would result in some serious bruising and actually helped to break them down. Nobody could punch like Marciano, and most likely, no one ever will.