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The numbers 3 and 4 appear prominently in the game of baseball. There are $3\cdot 3=9$ innings in a game, and three strikes are an out. However, 4 balls are needed for a walk. The number of bases can either be regarded as 3 (excluding Home Plate) or 4 (including it).

See Baseball Cover, Home Plate

© 1996-9 Eric W. Weisstein