Mets retire Koosman's 36 five decades after '69 heroics
Mets Editorial: How exclusive should number retirement be
Mets to Retire Jerry Koosman's Jersey - The New York Times
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Mets retire Koosman's 36 five decades after '69 heroics
Jerry Koosman's No. 36 to be retired
Jerry Koosman number retirement set for June 13 - Amazin' Avenue
Mets announce Jerry Koosman number retirement date –
Darryl Strawberry, Dwight Gooden to have numbers retired
Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Mets retire Keith Hernandez's No. 17 in Citi Field ceremony