NY Mets to retire pitcher Jerry Koosman's number next season

April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season – Society for American Baseball Research

Mets to retire numbers of Darryl Strawberry, Dwight Gooden

Retired Number Is Latest Mets Head-Scratcher

Mets retire Koosman's 36 five decades after '69 heroics

The Brooklyn Trolley Blogger: N.Y. Mets: The Great Jerry Koosman To Receive Long Overdue Tribute

Mets retire Willie Mays' No. 24 as Old-Timers' Day returns - Seattle Sports

Mets retire Koosman's 36 five decades after '69 heroics - The San Diego Union-Tribune

Mets To Retire Number of Team Legend Keith Hernandez – The Fordham Ram

Jerry Koosman's number retirement, 08/28/2021

Will the NY Mets retire Jacob deGrom's number 48 one day?

Mets retire Koosman's 36 five decades after '69 heroics