It's also difficult because you need actors who are good at their craft and who also: (a) look like pro athletes, and (b) can pull off some athletic looking moves. You can't use body doubles for everything and you can't have someone who throws like Johnny Damon. I really like Donald Glover, and maybe he could find a good trainer (wink) and pull it off. But his spaghetti arms don't show a lot of promise.Makes my point it isn't the Sugar Ray Robinson story.
For the love of the game is fictional.
There is chance it could be good, but with all the videos and mic'd up stuff we have access to it will be hard to have a movie of the game that will do it justice.
I hope I am wrong, and it is a great movie.
Michale B Jordan is a good example of the rare actor who can fit the criteria.