Jason Bay is "astronomically" better and hoping to begin working out within the next few days. After undergoing a battery of tests yesterday, the Mets outfielder was at Citi Field before the 4-3 loss to the Yankees and said symptoms from the concussion he sustained nine days ago as he hit the left-field fence have dramatically subsided. "I feel probably 1,000 times better at this point than I thought I was going to a week ago," Bay said. He has responded quicker from this concussion than the one he sustained in 2010, because the Mets were quicker to recognize the severity of the injury. Two years ago, Bay's head hit the left field fence at Dodger Stadium, but he played the next two games before flying home with the team.