This second concussion is the game-changer for Jason Bay. The Mets said yesterday they will give the beleaguered left fielder all the time he needs to recover from Friday night's concussion, but the reality is they have no idea as to what kind of player Bay will be when he returns from this most serious of injuries and they have no idea when he will be able to return. He could be gone for the rest of the season. Who knows if Bay will be able to bounce back at all? Bay suffered his first concussion in late July 2010 and was never the player the Mets thought they were getting when they signed him to a four-year, $66 million contract.