Ok, even though the title of the post is wrong , Floyd is nonetheless certainly impressive in this category. I mean, Judah's (non) KD, while more significant than the broken hand official one, was still a flash incident that produced little lasting affect on PBF.

But this makes Hagler's feat even more impressive. He was down once...I think. And it could've been called a slip. Does he take the crown for Hardest Boxer to Knock Down?