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James pointed out long ago, back in those 80's Digests, that great hitters, career great hitters, get to the bigs in a hurry. Usually they are there by 22. Or 21. Edgar was an outlier, but that's because the M's couldn't see/believe what they had hidden up there in The Great White Frozen North.
So, generally not a lot of guys get here in a huge hurry.....and the ones that do are usually destined for minor/major greatness.
Being TBYHIB is a big thing, then...because young hitters (who stay here) are generally pretty great. You're the best of the best, in a sense.
We had two for a decade and didn't win doodly! That's a great point, my friend.