MLB 2004
Big Ball
Press start to pause game play, then press L1, L2, L1, L2, Up, Right, Down, Left.
Big bodies
Press Start to pause game play, then press Up, Down, Left, Right, L1, L2, R2, R1.
Big heads
Press Start to pause game play, then press Up, Left, Down, Right, Up, Right, Down, Left.
Bigger manual aim
Press L2 + X when the pitcher has selected a pitch.
Easy pitches
This trick only works under the trainee and rookie difficulty settings. To get straight balls down the middle, pretend to bunt by holding Circle until the pitcher is about to throw the ball. He should throw it straight down the middle all the time.