Gentry undergoes precautionary MRI on back

PHOENIX -- New A's outfielder Craig Gentry was held out of Friday's workouts because of lower back tightness.

Gentry was sent for an MRI as a precautionary measure, with results not expected to be revealed until Saturday morning. The A's don't believe the injury to be serious, but rather a mild setback brought on by the outfielder's lengthy drive from Texas to Arizona.

"It's been a couple days it's been bothering him some, so we've been holding him back the last few to be proactive," said manager Bob Melvin. "I don't think there's any problems there."

Melvin noted that the 30-year-old Gentry, acquired by the A's with Josh Lindblom from Texas this winter, does not have a history of back issues.