A) Floyd Patterson

B) Roy Jones Jr

C) other

Roy Jones jr

Mike Tyson

Joe Frazier

Floyd Patterson

Roy Jones with the leaping left hook vs iceman Montell Griffin rematch was the best i've seen. Man, that was sweet revenge

I am going to go with Roy Jones Jr, he have a fast one! The way he would move and throw that hook to his opponents and knocking them down amazes me!

Roy jones jr. left hook is like a snake chasing it's prey.

Not the best, just someone no one else will say.

Pre 2000 joe calzaghe, before his hand smashed.

Watch calzaghe vs eubank the first 20 seconds.

Better than Jones Jr

Roy Jones. He would throw it from his hip while jumping at his opponent, and frequently knocked people out this way.

Frazier

here's my favourite leaping left hook ,there's a big one at the start and at the end ....BANG