Major League Baseball 2K9
50 Achievements
All the Tea...
Unlock all 320 Cards
2.1%
How to unlock the All the Tea... achievement in Major League Baseball 2K9 - Definitive Guide
use this checklist to keep track of the cards you still need
http://www.xbox360achievements.org/forum/showthread.php?t=13...
i just thought i would throw this out there.. if your working on the cards and playing single player. go to rosters and reset them.. that way they will be the rosters as they were when the game came out. everytime you restart the game you will need to do that. but this way everyone is on the right team and not in the minors.
Getting all of the cards will take a long time but is not difficult by any means. You can accumulate these on your own or through card battles online. If you are playing on your own, make sure you are on Pro difficulty. Use your team with maxed stats to unlock the cards for that team and others teams. The Classic Cards can be gotten through the technique discussed in 'Unhittable' as long as it's on Pro difficulty.
Although it's time consuming, I believe the best way to unlock every card is to max your stats and lower the stats to 0 for every player on every team. It takes a long time to edit the rosters, but once that's done the task becomes so much easier. If you're patient and don't want to play against another person, go for it.
NOTE: If you use the technique for reloading the game and finishing it, there is a glitch in the trading card area within the in-game menu. In Classic Cards, it will show higher numbers than what's required and won't show the next card needed. Don't worry about this, as it's cosmetic. Your cards will still unlock. For strikeouts, if you've gotten the requirement but no card is unlocking, throw a strikeout in this or any game. Same thing for home runs and stolen bases.