Major League Baseball 2K7

All extras:
Enter Game On as a case-sensitive code.

All bonuses:
Enter Derek Jeter as a case-sensitive code to unlock all jerseys, dream players, stadiums, team logo baseballs, etc.

All cheats:
Enter Black Sox as a case-sensitive code.

Mickey Mantle card:
Enter themick as a case-sensitive code. Mickey Mantle will now be available as a free agent.

Pinch Hit Mick card:
Enter phmantle as a case-sensitive code. Mickey Mantle will now be available as a pinch hitter.
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Big Blast card:
Enter m4murder as a case-sensitive code. Your chance of hitting a home run will be increased for one game.

Triple Crown card:
Enter triplecrown as a case-sensitive code. This increases the chance of the hit by the third, fourth, and fifth hitters in the lineup by 50% for one game.

Mighty Mick card:
Enter mightymick as a case sensitive code.

Hint: Save money in Franchise mode:
Release a high paid player to free agency. Then, offer them a new contract. Their asking price may be lower than what you were already paying them. This could save your team millions of dollars. Sometimes your players will demand more money after you release them -- make sure to save the before you attempt this.
Rem Martinez.