Yeah, a lot of boxers don't lift heavy. I've heard multiple times that Ali never touched a weight room. I'm not surprised by this, but I also am. Shannon's got some big fuckin' arms.
I never did weights when i played and i could dunk the ball, im white and 5'11". im into training that you do if your a boxer, much better for your muscles, much more explosivness. mass+speed=power.
I'm kinda surprised at this actually. I thought that at some point or until today, he still lifts weights.