Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Jerry Koosman's number retirement, 08/28/2021
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NY Mets to retire pitcher Jerry Koosman's number next season
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Young Nolan's Instagram, Twitter & Facebook on IDCrawl
Young Nolan's Instagram, Twitter & Facebook on IDCrawl
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Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman Jersey Retirement Ceremony, Watch live as we retire Jerry Koosman's number 36., By New York Mets
Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Jerry Koosman number retirement set for June 13 - Amazin' Avenue