How New York Mets signed pitcher Jerry Koosman thanks to eagle-eyed Staten Islander
How New York Mets signed pitcher Jerry Koosman thanks to eagle-eyed Staten Islander
Ultimate Mets Database - Jerry Koosman
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman - Wikipedia
Jerry Koosman Baseball Stats by Baseball Almanac
Jerry Koosman - Mets History
Jerry Koosman - Mets History
Jerry Koosman Stats, Fantasy & News
Jerry Koosman (2003) – Society for American Baseball Research
Jerry Koosman Sets Early Franchise Record - Mets History
Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)