Runners on first and second. Count 2-1. Pitch a ball. Batter trots towards first base as though it is ball 4. Two runners head for third and second. No throw is made as catcher asks if it is ball 4. If the batter knew it was ball 3 and took off for first base (as a trick play) - is it just a bush-league play that worked, or is it illegal?
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