Plot: After sustaining permanent brain damage, Rocky retires from boxing. But he still needs money, so he trains an up-and-comer who turns on him.
Bob says: "I think [the brain damage issue] doesn’t sell movies. Whether I think they do enough or not enough, doesn’t matter. It’s dollars and cents.
"A lot of what goes into fighting is based on loyalty between the trainer, the manager, and the fighter. There are times when the person that you believe to be totally loyal will turn on you and it’s shocking. It really is. There was a guy named Dave Jacobs who worked for Sugar Ray Leonard. He raised Leonard -- taught him, kept him off the streets. It’s what made him what he is. And Leonard, once he started to make money, he got a lawyer. That was strictly a business guy. The trainer usually gets 10% -- whatever the fighter gets, the trainer gets 10%. When [Leonard] was fighting for $6,000, [Jacobs]’d get $600. $10,000, he’d get a thousand. But then when he started getting up in the $300,000s or whatever, the lawyer said, 'That’s too much money for that guy.' And he talked Leonard into putting Jacobs, who discovered him, on salary. Jacobs quit. And all the people in boxing respected him for that.
"That was another section out of real life. They tried to get everything that they knew could happen into those movies and, for the most part, they did."