shadowboxing sparring with an imaginary opponent, especially in training as a boxer; here, the exercise Donatelli has Alfred do to train, the exercise Alfred tires of and sees no purpose in.
tenpin a specific one of the ten bowling pins. Here, it suggests the way Alfred is knocked over by the medicine ball.
racketeers people who obtain money illegally, as by bootlegging, fraud, or, especially, extortion. Here, Lou Epstein uses the term in reference to the bad people he sees affiliated with boxing.
