Zuri Lawrence will forever hold the record for lowest KO ratio. It's impossible to break it. http://www.boxrec.com/list_bouts.php?human_id=15802&cat=boxer
Should have read the title atsch In that case... Maxie Rosenbloom - 19 knockouts in 298 fights (6.4%)
I hope you are joking, this fight would be finished quicker than the Pac-man v Hatton fight. I mean come on Paulie got out boxed by Hatton.