Greb considered everything above the knee as fair territory because when you are "windmilling" punches go everywhere. Pedroza of course would foul forever to keep his WBA title and say afterwards that the other fighter was a whiner. Tito, when in trouble, was known to send a few low. LaMotta busted up Tony Janerio because Jake's wife thought Tony was "cute". I think Armstrong "heeled" a few. Dempsey smoked Sharkey with a punch to the huevos, followed by a left hook to the jaw,,,,and later defended his action of keep fighting by saying "What should I have done, sent him a telegram?" Dempsey got the title shot too. In reality, most pro fighter know how to put the referee on one side, and do some dirty work on the "blind side".
Duran/Camacho may have been the ultimate matchup between great streetfighting boxers (albiet far too late). Sammy Serrano comes to mind. He nearly repelled the challenge of Roger Mayweather with a deadly elbow. Carnera was no choir boy. (The best punch he hit Loughran with was a backhand.) Foreman shoved and pounded kidneys, while Ali yanked down on heads. Then, Muhammad had the nerve to ***** about Wepner's rabbit punches. Sharkey may have been the dirtiest heavyweight champion of all time. Galento and Marciano had lethal elbows. Hamsho/Antuofermo would have been a lot of fun. If you want to learn how to box, read John J. Walsh or Edwin Haislet. If you want to learn how to cheat in the ring, read Jay C. Thomas.
dempsey was damn good at this trade with rabbit punches savage body blows that often strayed low,kidney shots and much more he would show max baer an inside trick one time when max screamed and said thats illeagel jack smiled and said they will warn you the first time you do it