Well that's really exaggerated, Newman just got rough in sparring and Zale just got rough aswell not angry guess Newman wasn't exacly iron jawed
Are you sure about that Rocky later said that he didn't like boxing because of the brutality of the sport....
Yes. Not many fighters "like" the brutality of the sport, but that doesn't mean they didn't have bad tempers. One of Marciano's more notable street fight stories was him squaring up against a huge Australian guy in a bar when he was in the service and laying the guy out with 1 shot. I believe in the 60s Marciano got in some trouble for knocking a guy out who refused to pay the bill when they were at a restaurant.