Use the following trick to unlock all the cards in one or two games. Once you unlock the Cooperstown Legends and the Pixels, play as the Legends. You will find that within the fifth or sixth inning, every hit equals ten points and possibly more. Constantly hit homeruns and strike out the batters and you should have forty to fifty packs to open after the game. This is the easiest way to complete your card collection and unlock the cheats.