Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman's No 36 to be retired by Mets in June - ESPN
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Mets retire Koosman's 36 five decades after '69 heroics
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Mets should retire Jerry Koosman's number this year regardless of
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Mets to Retire Jerry Koosman's Jersey - The New York Times