Dodgers third baseman Casey Blake is scheduled to undergo a precautionary MRI exam sometime on Monday. The team wants to make sure the discomfort he is feeling in his back near his rib cage isn't something serious. Los Angeles manager Don Mattingly said there is no reason at this point to believe Blake will miss significant time. "Just from talking to [trainer] Stan [Conte], they still think it's a couple-to-three-days type of thing," Mattingly said. "They just want to make sure it's temporary."