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Mets retire Jerry Koosman's No. 36 in Citi Field ceremony
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Mets announce Jerry Koosman number retirement date –
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New York Mets: Jerry Koosman to Have His Number Retired
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Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
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Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN
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Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN
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Jerry Koosman Mets Hall of Fame Plaque - Mets History
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Jerry Koosman number retirement set for June 13 - Amazin' Avenue
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Mets to Retire Jerry Koosman's Jersey - The New York Times
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Jerry Koosman's No. 36 to Be Retired By Mets in June – NBC New York