Harder puncher: Thomas Hearns, Julian Jackson, Gerald McClellan, or GGG?

The weigh-in rules changes in the mid 80s, after Mancini-Kim in 1982 and the canceled Spinks-EM Muhammad rematch in 1983.

McClellan was a huge weight cutter and put on a shitload of weight overnight. Jackson and Hearns fought under both rules. It’s hard to imagine that Hearns fought at 147 during the era of the same day weigh ins.

 

Jones wouldn`t have knocked out Duran and Jackson at light middle would have had a better chance at stopping Duran than G-man at middle, I think Gerald was a lot like Iran Barkley and both men were beat by Benn.

 

I'd have to go with Jackson. His power was almost unnatural. To be able to knock guys out cold while moving backwards and having very little leverage or momentum behind his shots seems almost physically impossible.

He wasn't the greatest boxer by any means, but wow did he have that one punch knock out power. There were a few fights he was in where he came from behind to knock his opposition out (came out of nowhere.) His power is right up there with the very best P4P punchers in the history of the sport.