Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets to retire Jerry Koosman's No. 36 in June - Newsday
Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement
Mets announce Jerry Koosman number retirement date –
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets to retire Jerry Koosman's No. 36 in June - Newsday
Mets' Jerry Koosman is finally getting the respect he is due