Teenage Postseason Debuts

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Ken Brett

Photograph By Getty Images

The older brother of Hall of Famer George Brett, Ken Brett was the youngest pitcher ever in the World Series. In 1967, three weeks after his 19th birthday, he appeared in relief for the Boston Red Sox in Game 4. He also appeared in Game 7 and gave up zero hits in 1 1/3 scoreless innings. Brett ended up playing for 10 teams in 14 major league seasons.