Trivia: At the beginning, Martin Scorsese did not want to make Raging Bull when he found out it was a sport-themed film, and Scorsese was - and is - no sport fan. When Robert DeNiro first spoke to him about Jake LaMotta, his initial reaction was, 'A boxer? I don't like boxing.' Cooler heads prevailed, and hence the movie was made.
Trivia: Even though the last match featured was between Jake LaMotta and Sugar Ray, the latter was invited to be best man(!) at one of LaMotta's marriages. There is a charming black and white photograph of both LaMotta and Sugar Ray in tuxedos. They were all smiles as Sugar Ray adjusted Jake's bow tie.
Trivia: During the final match with Sugar Ray, a veteran ringside observer seated in the front row counted between fifty to sixty punches that Sugar Ray delivered to Jake LaMotta. Even after Jake was defeated, it was not all bitter: After the fight, the fans sang 'For he's a jolly good fellow' for him.
Trivia: There are only 10 minutes of boxing scenes throughout the whole film.