Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Jerry Koosman Mets Hall of Fame Plaque - Mets History
Mets to Retire Jerry Koosman's Jersey - The New York Times
Ultimate Mets Database - Jerry Koosman
Mets Editorial: How exclusive should number retirement be? - Amazin' Avenue
Jerry Koosman's No. 36 retired by Mets
Mets announce Jerry Koosman number retirement date
NY Mets to retire pitcher Jerry Koosman's number next season
Mets to Retire Jerry Koosman's Jersey - The New York Times
With Jerry Koosman's number getting retired, here are four more Mets deserving of the honor
Jerry Koosman: NY Mets legend on jersey retirement, World Series
New York Mets news: Jerry Koosman's No. 36 will be retired next year