Jerry Koosman – Society for American Baseball Research
Jerry Koosman - Mets History
Mets History: Jerry Koosman led the league in two very different stats in 1977
How New York Mets signed pitcher Jerry Koosman thanks to eagle-eyed Staten Islander
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Ultimate Mets Database - Jerry Koosman
Jerry Koosman - Mets History
April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research
Ultimate Mets Database - Jerry Koosman
Jerry Koosman – Society for American Baseball Research
Jerry Koosman - Mets History
Jerry Koosman (2003) – Society for American Baseball Research
Jerry Koosman Sets Early Franchise Record - Mets History
Jerry Koosman - Mets History
Jerry Koosman Baseball Stats by Baseball Almanac
