That would be funny but I think it most likely the shirt said FUBU - For Us, By Us. A very racist clothing line intended only for people who have overt African features.
I looked up images for the fubu brand you mentioned... yikes!
Similar "look", but FUBO was on the upper back, and it wasn't anything stylish, just looked like a generic sports shirt that is personalized (and had been used for that purpose, and that he had just come from a game). So likely it was the guy's name.
I was trying not to stare (or crack up), lol.