It wasn't Duran he beat when he came back

It was Luis Santana. Why do they have to change big plot points like this? Because people have heard of Duran not Santana? I hate it when they alter the story for dramatic purposes, yet it would have been just as good with the real person instead of Duran.

It's a great story, odd it took so long for someone to make a movie about it.

Of course the real guy is the usual douchebag. "I don't do drugs or alcohol" and yet he's had all kinds of alcohol related issues. Plus the real paz looks like a douche, he really looks like your typical boxer. Bad casting in this movie playing him, I thought. But I guess getting someone ugly to play the lead wouldn't go over well with most of the dumb audience.