Mets to retire 1969 World Series hero Koosman's number in August
When the Mets Got You to Believe
New York Mets, ArmchairGM Wiki
Mets to Retire Jerry Koosman's Jersey - The New York Times
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McAndrew was part of Mets' miracle 50 years ago
Why don't the Mets retire more jersey numbers? – Mets360
Mets retire Koosman's 36 five decades after '69 heroics
April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research
Mets to retire Koosman's number — Queens Daily Eagle
Mets retire Koosman's 36 five decades after '69 heroics
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Jerry Koosman: All Time Mets Left Handed Pitcher (Part One: 1967-1972)
