Retired Number Is Latest Mets Head-Scratcher
Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN
Mets retire Jerry Koosman's No. 36 in Citi Field ceremony
Ed Kranepool must be next Mets number retired after Jerry Koosman: Pantorno – Metro US
Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement
New York Mets: Jerry Koosman to Have His Number Retired
Jerry Koosman's No. 36 retired by Mets
Mets to retire Koosman's number — Queens Daily Eagle
Ultimate Mets Database - Jerry Koosman
Mets to Retire Jerry Koosman's Jersey - The New York Times