Jerry Koosman – Society for American Baseball Research
Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)
Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)
Jerry Koosman - Wikipedia
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Jerry Koosman Stats, Fantasy & News
Out Of The Shadows: Jerry Koosman - Metsmerized Online
Ultimate Mets Database - Jerry Koosman
Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement
Jerry Koosman Baseball Stats by Baseball Almanac
Jerry Koosman interview
Ultimate Mets Database - Jerry Koosman
Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)
Mets History: Jerry Koosman led the league in two very different stats in 1977
Insiders: Jerry Koosman to attend 2020 Queens Baseball Convention - The Mets Police
Jerry Koosman number retirement set for June 13 - Amazin' Avenue