Mets retire Keith Hernandez's No. 17 in Citi Field ceremony
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets honor Jerry Koosman with overdue jersey retirement
Mets should retire Jerry Koosman's number this year regardless of 2020 season outcome
With patience, home runs, and good luck, even the Mets can win a game - Amazin' Avenue
Mets set to pay tribute to Jerry Koosman - Newsday
Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Keith Hernandez Joins Short List Of New York Mets With Retired Jerseys
Mets to retire Gooden's No. 16 and Strawberry's No. 18 next season – Trentonian
New York Mets should consider these four players for jersey retirement