This Date in Mets History: June 24 — Koosman wins 100th game, Mets help right a social wrong - Amazin' Avenue
Jerry Koosman Sets Early Franchise Record - Mets History
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JERRY KOOSMAN NEW YORK METS 1969 WS CHAMPS ACTION SIGNED 8x10
Mets History Simulated: The kids on the 1965 squad provide some hope
Mets News: Mets to retire Jerry Koosman's number 36 in 2020. - Amazin' Avenue
Mets to Retire Jerry Koosman's Jersey - The New York Times
April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research
Mets History: Marveling at Jerry Koosman's 1968 rookie season
Jerry koosman hi-res stock photography and images - Alamy
Mets to Retire Jerry Koosman's Jersey - The New York Times