It would be impossible for me to narrow it down to 5. Surely Mysterious Billy Smith would be on there. http://boxrec.com/list_bouts.php?human_id=31315&cat=boxer&pageID=1
I would agree with Golata, Tyson, Hopkins. Don't know about Pedroza. I wouldn't consider Holyfield dirty but he was lethal with his head when coming in. Perhaps controversially, I would include Ali, who always held his opponents behind the head and pulled them down. Constantly. He should have been DQ'd in many fights for these tactics.
01 - Antonio Margarito 02 - Fritzie Zivic 03 - Mysterious Billy Smith 04 - Sandy Saddler 05 - Harry Greb
Ali had his illegal tactics like most fighters, but I definitely wouldn't put him up there guys like Joel Casamayor, Fritzie Zivic, or Luis Lazarte. Freddie Norwood gets at least a (dis)honorable mention alone for the Derrick Gainer fight.
This guy is hilarious ... some boxrec extracts - Police stopped the fight when it got too wild, Captain Wittman stating: "Gentlemen, I will tolerate boxing contests, but no slogging; if the fighters can select a referee who will see that a fair boxing contest is carried on, I will not object, but this slogging game I will certainly not permit." Immediately after this the referee declared the fight a draw. Gallagher refused to go on with the fight as long as the referee had decided the match a draw. (San Francisco Call) "Mahoney landed more clean blows than Smith, but they seemed very light and had little effect...Smith, as usual, waited until Mahoney clinched and then got back at him with heavy blows to the kidneys...On the whole, the bout was unsatisfactory from the spectators point of view." Philadelphia Record Results from the Baltimore American. This bout took place at Germania Maennerchor Hall. Smith indulged in several "mad rushes" throughout, during once of which his eye came into contact with Jackson's head and split open. Smith's corner threw in the sponge before the start of the thrid round, claiming their man couldn't see. And my personal favourite - Smith knocked Ferns down 15 times before fouling him. I was ****ing pissing myself when I read that.