I believe it was the Cinncinatti Reds vs. Phillies in a 2008-09 PHI home game. A 10 run bottom of 1st inning helped the Phils take a 22-1 victory!
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The most runs the Yankees have scored in one inning is 14in the 5th inning of a game against the Washington Nationals on July 6, 1920.
i believe it was the cardinals the other day who scored 9 in the 7t inning
Mike Piazza.
13 runs in the 4th inning April 13, 2003 at Cincinnati Reds.