I collect a lot of different players but generally I'm content with whatever cards of these players I get in packs or boxes I buy. I don't worry about trying to collect every card of a player. There are so many different cards for each player (especially a player l1ke Pujols) that making a list of every card of that player would be exhausting. I maintain a FileMaker database of my own devising to track all my cards. I did a post on that maybe 6 months ago. An Excel spreadsheet to track cards of an individual player should work pretty well. Like you said, for a player like Pujols, it would be easier to track what you have.