Rarely disputed, the hardest boxing hit was the 1952 13th round knockout of Joe Walcott by Rocky Marciano. This was a title fight with the title exchanging hands from Walcott to Rocky. The punch was a short right hand by Marciano to Walcott's head. Walcott crumbled to the ring mat and was knocked for a number of minutes. Interestingly, if Marciano had not knocked out Walcott, he would have lost the fight on a decision. This would have been his first loss. In 1956, Rocky retired undefeated at 49-0. The knockout can be viewed on YouTube.
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Well, we have to go back to the physics class in schoolto prove that. We learned that Mass*Speed=Power. I would go for Mike Tyson. Here is the formula with Tysons data: Tysons weight(mass), 239 3/4 lbs(peak witha height of 5'10'')*Tysons Speed (Tysonis the fastest punching heavyweight boxer, I'veever seen. Even faster in punching than Ali was!)=Tysons Power(hardest punchingpower ever). Some say here Earnie Shavers or George Foreman, but both of them were much slower than Tyson and weighted less when you look at the height andweight proportion (Tysons BMI was higher). So when you put their data in the formula the resultwould be lower.So as we see is that Mike is, according to physics, the hardest puncher in heavyweight boxing ever.
Hardest punchers in Boxing were:
1. Rocky Marciano
2. Mike Tyson-his punch was approximately 400kg per square inch and he was a very fast puncher, Fastest heavyweight Boxer.