Agreed, it kept your interest. I also liked the sub-story line of the 'haves and have nots', private Lakewood St. Eds, with multiple teams, a nutritionist, etc., and public Lakewood down the road who has one good kid living in an apartment with his single mother but who has a dream of being a champion.
If you haven't seen it I won't spoil it for you, other than to say it is a documentary, and not Hollywood.