Mets to Retire Jerry Koosman's Jersey - The New York Times
Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN
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Jerry Koosman number retirement set for June 13 - Amazin' Avenue
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2021 New York Mets Jerry Koosman Number Retirement Night Bobblehead SGA 1969
