His tweet stating this has since been deleted, but here's what it said:
If the players all retired tomorrow, we would replace them, the game would go on; in three years it would make no difference whatsoever. The players are NOT the game, any more than the beer vendors are.
I agree with him. The game is the game. Yes, MLB players are of the highest quality. But it is the game they play that we come to watch. I enjoy baseball on any level because of the game, not the players. The quality of play only adds or takes away from the enjoyment. The players don't make the game, they just make the game better. The game will exist when all of these players retire and move on.
It's discussed more in this article:
MLBPA chief Tony Clark fires back after Red Sox consultant Bill James calls all players replaceable
Thoughts?