MLB 08: The Show cheats and cheat codes for Playstation 3

Unlock all classic stadiums:
While you are at the main menu, press Down, Right, Circle, Square, Left, 
Triangle, Up, L1. If you entered the code correctly, your controller will 
vibrate. 

Unlock all Golden and Silver era players:
While you are at teh main menu, press L1, L2, Square, Square, Triangle, 
Circle, Down. If you entered the code correctly, your controller will 
vibrate. 

Note: 
These codes are work in Exhibition mode, but it will not show up on 
your profile.


Easy saves:
Put your in closer at the beginning of the seventh inning and pitch 
him the rest of the game.