Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online

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Jerry Koosman's No. 36 Retired By the Mets, The greatest money pitcher in the history of the Mets. Congratulations to Jerry Koosman on his Mets number retirement!, By SNY

Mets will retire Jerry Koosman's number in 2020 – New York Daily News

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Mets announce Jerry Koosman number retirement date –

1978 Felix Millan, Topps Card Number 505 - Metsmerized Online

Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online

New York Mets: Jerry Koosman to Have His Number Retired

Jerry Koosman's No. 36 retired by Mets