Brandon Webb (shoulder) admits that he's not sure he'll pitch for the Rangers this season after his latest setback. Webb was scratched from a rehab start for Triple-A Round Rock Friday after feeling discomfort while warming up in the bullpen before the game. He was examined by Dr. Keith Meister Saturday, though it's not clear what the result of that exam was or when Webb might return to the mound. "It hurts, so I shut it down," Webb said. "It takes all my velocity, all my life, it takes everything away when it feels like that." The righty also hinted that if he doesn't make it back this season, he might decide to retire. "How many times can you do it?" Webb said. "Who knows? I have no idea."