Learning about concisions in the past 20 has been bigger than- I don't know. PEDs? I mean the humbling nature of the whole concision education. What we don't know. Imagine, in the history of the game, how many catchers- catchers alone- who may have had undetected concision syndrome. How many of them would have benefitted, like Joe, to switch positions before it was too late. Not many would have had the clout, or have received more than one season's worth of patient tolerance.