Jerry Koosman – Society for American Baseball Research

Mets to Retire Jerry Koosman's Jersey - The New York Times

Ultimate Mets Database - Jerry Koosman

April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research

Jerry Koosman Death Fact Check, Birthday & Age

How New York Mets signed pitcher Jerry Koosman thanks to eagle-eyed Staten Islander

Jerry Koosman (2003) – Society for American Baseball Research

Ultimate Mets Database - Jerry Koosman

Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)

Ultimate Mets Database - Jerry Koosman

Jerry Koosman - Age, Family, Bio

Jerry Koosman: All Time Mets Left Handed Pitcher (Part Two-1973-1978)

Jerry Koosman- Mets All Time Lefthander (Part Three 1974-1985)