Todd Helton admits that his surgically-repaired left knee still bothers him from time to time. "The knee has given me a little bit of a problem," he said. "When I walked out of surgery I didn't feel a thing. But at some point this spring I started feeling it. So it hurts, now and then, but I know that will go away again." Helton will be the Rockies' first baseman on Opening Day, but he's a poor bet to stay healthy and even if he does should end up sharing the position.