OAKLAND, Calif. -- Derek Norris hit a walk-off single with two outs and the bases loaded in the 10th inning, lifting Oakland over Tampa Bay.

The walk-off hit was the second of the catcher's career and the Athletics' eighth of the season. It came against former A's closer Grant Balfour (1-4).

With one out in the 10th, Sam Fuld grounded a sharp single to center off Balfour. After issuing two walks, Balfour struck out Brandon Moss, but Norris delivered the game-winner, grounding a single to center.