In the United States, the longest high school game ever lasted 25 innings. It took place on May 2, 1975 between Hayward High School and San Lorenzo High School in San Lorenzo, California. Hayward defeated San Lorenzo 2-1.
In 2014, there was a 50-inning high school baseball game played in Japan. It took place over four days between Chukyo High School and Miura Gakuen High School. The game remained a 0-0 tie until the top of the 50th inning when Chukyo took a 3-0 lead. The winning pitcher threw a complete game with 709 pitches.
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