All classic stadiums
At the main menu, press Down, Up, Right, Down, Up, Left, Up, Down to unlock all classic stadiums. If you entered the code correctly, the controller will vibrate. It will not show up on your profile, but it at least works in Exhibition mode.

All Golden and Silver era players
At the main menu, press Left, Up, Right, Down(2), Left, Up, Down to unlock all Golden and Silver era players. If you entered the code correctly, the controller will vibrate. It will not show up on your profile, but it at least works in Exhibition mode.

Easy money
Use the following trick to get a lot of money in Franchise mode. Go to your calendar before a home game. Make the normal choices needed to play a game (controller, pitcher selection, etc.). Then at the line up screen, exit all the way back to your calendar. You will receive the revenue for that game. Repeat this as many times as desired. It is a good idea to only do this on home games as you will receive the advertising, ticket, and concession revenue. For example, with a team like Kansas City or Tampa Bay, you will only get a small amount of money, but it will increase your attendance. Also, do not do this during spring training or opening day as you will not receive any money.

Easy saves
Put your closer in the game at the start of the seventh inning and use him for the rest of the game.

Save money
In the offseason when you are resigning free agents, there is a very effective way of saving a lot of money for free agency without changing stats. Instead of lowering and raising stats, just go to "View Roster" and convert all of your starters and closers into relievers. Resign all of them to small deals worth at most about $3 million a year. Once you sign them, change them back into their original position. It may not sound like much, but if you have a $19 million pitcher like Johan Santana, it can be a lot of free money. This will also work with turning slow players into the 2B or SS position and resigning them, or turning small players into the C or 1B position and resigning them.