In both the seventh and eighth innings, Baltimore loaded the bases only to come away with one run as the Marlins' bullpen danced out of danger each time.
"We had some trouble cashing them in today," said catcher Ryan Lavarnway, who went 0-for-4. "We had some good at-bats, but we couldn't push them across."
The O's loaded the bags with one out in the seventh on a Chris Davis double and walks to Everth Cabrera and Delmon Young. But Marlins starter Brad Hand came on to force Steve Pearce into a 5-4-3 double play.