Cheat mode
Pause game play and press Square(2), Circle(2), L1, R1. A sound will confirm this portion of the code. Then, press L1 + L2 + R1 + R2. The "Ball Cannon" (set pitch physics) and "Game State" (edit game parameters) options will now be unlocked.
Fights
Hold Square after your batter is beaned and he will charge the pitcher and start a fight. Your player will be ejected.