New York centerfielder Carlos Beltran is worried about his surgically-repaired knee as the team prepares for the new season, according to Newsday. "When you have surgery, you lose all the muscle in your quads; everything goes away," Beltran said. "Because the knees are fixed, the sensation of tendinitis I was having, I don't have anymore. But if I don't strengthen my quads, then all the pounding is going to be in the knees, and I'm going to aggravate the knees again."