MVP Baseball 2004 Cheat: Bat Breaking Player
Create a player with the name Erik Kiss (case sensitive). His bat is much thinner than normal, and will break at nearly every at bat.
MVP Baseball 2004 Cheat: Huge CAP points In Dynasty Mode
Enter the following name on created player mode: John Prosen and you will get more points to sign your favorite players.
MVP Baseball 2004 Cheat: Huge Sluggers
Go to create a player and create a player named jacob paterson, isaiah paterson or keegan paterson. (Case Sensitive) Once he is on your team you will have your self a huge slugger. Most of the time he slams it out of the park with ease with distances over 700 ft.