Jerry Koosman's No 36 to be retired by Mets in June - ESPN

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Jerry Koosman's No. 36 to Be Retired By Mets in June – NBC New York

Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN

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Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN

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