Jerry Koosman number retirement set for June 13 - Amazin' Avenue
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Jerry Koosman's No 36 to be retired by Mets in June
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New York Mets news: Jerry Koosman's No. 36 will be retired next year
Mets to Retire Jerry Koosman's Jersey - The New York Times
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Mets to retire Koosman's number — Queens Daily Eagle
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Jeff Washington
Mets Announce Plans to Retire Jerry Koosman's Uniform #36, by New York Mets
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Jeff Washington