Originally Posted by Marciano Frazier
You can't reasonably establish that Moore likely hit harder than Marciano on the basis of only one opponent's opinion/experience
True, but I'm not basing that on only one opponent's expressed opinion/experience. Moore himself stated immediately after his match with Marciano that, "He's the strongest boxer I ever fought. I don't know that he is the hardest hitter, but he certainly hits hard enough." It's intriguing to me that the Mongoose would express some doubt about the supremacy of punching power from an adversary who he had a warm relationship with, at the time they'd just competed against each other. After his career was over, Archie definitively asserted that the first right hand Yvon Durelle floored him with in their initial meeting was indeed that hardest punch he ever took in his career.
To be sure, Rocky had more than sufficient power for his needs. But two highly qualified and experienced opponents of Rocky have both stated that he was not the man who hit them the hardest. One opinion could perhaps be readily dismissed, but such a confluence of feedback on this subject as Lowry's and Moore's can give one more pause for thought.
Marciano himself indicated that he felt his two knockout punches against Walcott were the hardest punches he ever connected with.