Casey Blake has MRI on back

GLENDALE, Ariz. -- Los Angeles Dodgers third baseman Casey Blake had a precautionary MRI exam on Monday to make sure the discomfort he is feeling in his back near his rib cage isn't something more serious than team medical officials believe it to be.

The test results weren't expected back before Tuesday, but Dodgers 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."

Blake left Saturday's split-squad Cactus League game against the San Francisco Giants immediately after running hard to first base on a bunt in the top of the first inning. He said Sunday morning that he was still extremely sore and that he hadn't slept well the night before, but by Monday, Blake reported some improvement.

"It was a little better last night," he said. "We should know more after today."

Tony Jackson covers the Dodgers for ESPNLosAngeles.com.