You can gain points for certain feats performed during a game. You can use these points to buy cards which unlock cheats, stadiums, jerseys, producers, and players. An easy way to get a lot of points is to throw a perfect game. This is worth 100 points. Switch controls every time the CPU is up at bat and intentionally strike out. This will get you points for 27 strikeouts, and for a perfect game. Repeat this as many times as needed to get an unlimited amount of points.