After the first bash brother "strips" in the penalty box, the next time you see him (5 min later) you see him with all his pads on and everything. They never refer to the fact that he threw his pads into the crowd.
When Charlie and Fulton go to the amusement park, an arcade attendant jokes with them about playing hooky. The man who plays the arcade attendant in this movie also played an unnamed celebrity at Coach Bombay's party in D2, and the same man played a lawyer in the first movie. He also happens to be the movie's screenwriter, Steven Brill.