There's only one player who has hit walk-off home runs both for and against the Mets. The one that came first was the one that led to a happy recap. It came against a pitcher who would later be a Met. The second homer, the one against the Mets, came on the 12-year anniversary of the first homer. It was hit, naturally, against a pitcher who was currently a Met. Anybody care to guess who this batter is?