Mets set to pay tribute to Jerry Koosman - Newsday
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns - Seattle Sports
How New York Mets signed pitcher Jerry Koosman thanks to eagle-eyed Staten Islander
Mets retire Keith Hernandez's No. 17 in Citi Field ceremony
Mets retire Koosman's 36 five decades after '69 heroics
Mets Editorial: How exclusive should number retirement be? - Amazin' Avenue
Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
Jerry Koosman's Mets number retirement is finally here
Mets retire Keith Hernandez's No. 17 in Citi Field ceremony
Mets to Retire Jerry Koosman's 36 – Blogging Mets