In [[baseball]], a '''double header''' is two games played in immediate succession.
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In [[baseball]], a '''double header''' is two games played on the same day in the same park.
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Traditionally the games would be played back-to-back, with only one admission fee charged. At the major league level, to the extent double-headers are played today they are played as "day-night" double-headers, with separate admission charged for each game, or when a game is rained out and has to be made up on the same day as a scheduled game.