Mets to retire pitcher Jerry Koosman's number next season
Mets to Retire Jerry Koosman's Jersey - The New York Times
New York Mets - We will retire Jerry Koosman's number 36 in 2020
METS TO RETIRE KEITH HERNANDEZ'S UNIFORM #17
Jerry Koosman: NY Mets legend on jersey retirement, World Series
Jerry Koosman Autographed Jersey - Mets History
Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Will the NY Mets retire Jacob deGrom's number 48 one day?
Mets retire Jerry Koosman's No. 36 in Citi Field ceremony
Mets retire Koosman's 36 five decades after '69 heroics