New York Mets, ArmchairGM Wiki
October 16, 1969: Miracle Mets become first expansion team to win a World Series – Society for American Baseball Research
Ya Gotta Believe, New York Mets Wiki
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New York Mets: Color Photos of the Legendary 1969 Championship Team
Jerry Koosman - Wikiwand
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List of Arizona Diamondbacks seasons - Wikipedia
Friendship, memories and a year with the 1969 New York Mets - ESPN