Of course you can't draft Ruth for those years as he does not have ATG cards for those years.
BUT, that said it would seem high time that pitchers should have cards based on their exact hitting stats instead of the 1-8 nonsense that the game has been using since 1961.
The current game engine can, and does, handle individual pitcher hitting cards. But the engine they are using for the ATG game is nowhere near the current engine, I suspect they have just grandfathered the engine that was current when ATG 1 was introduced.