At the "Trading Card Album" menu, select the "Codes" option. Enter one of the following codes to unlock the corresponding set of trading cards:
| Result | Code |
| American League Central Classic Jersey | ALCENTRALCLASSICTHREADS08 |
| American League East Classic Jersey | ALEASTCLASSICTHREADS08 |
| American League West Classic Jersey | ALWESTCLASSICTHREADS08 |
| National League Central Classic Jersey | NLCENTRALCLASSICTHREADS08 |
| National League East Classic Jersey | NLEASTCLASSICTHREADS08 |
| National League West Classic Jersey | NLWESTCLASSICTHREADS08 |
Have the most players named to your league's All-Star team during any season to unlock the Big Head card. Note: You must play through at least ten games in their entirety (no simulations) by the All-Star Break.
To get the card for uniforms that requires you to defeat a team using a Single A club (for example, the '83 New York Mets), adjust your rosters and send all major league players down to Single A. Then when playing an exhibition game, adjust the lineup of the team you are playing to sit star players on the bench, put people out of position, and start a reliever. You should then be able to easily defeat the team in a seven inning game on the Rookie difficulty and unlock the card. You can unlock more cards at the same time by using a team that you have not earned cards for as your Single A team.
In Franchise mode, enable the ability to force trades. In order to get free Inside Edge Reports and not spend money to acquire them, just trade any player to your team, then trade them back to their original team. By being part of your team once, you will know their tendencies. The next time you play against that player, you will have their report.
Successfully complete the indicated task to unlock the corresponding card: