311 Jerry Koosman Photos & High Res Pictures - Getty Images
Mets retire Koosman's 36 five decades after '69 heroics
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New York Mets - We will retire Jerry Koosman's number 36 in 2020
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Mets to retire Jerry Koosman's No. 36 in June - Newsday
Mets to Retire Jerry Koosman's Jersey - The New York Times