Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets will retire Jerry Koosman's number in 2020 – New York Daily News
Mets announce Jerry Koosman number retirement date
New York Mets - We will retire Jerry Koosman's number 36 in 2020
Koosman Jersey Retirement - Aug 28
Jerry Koosman to Have Number Retired on August 28, 2021
Jerry Koosman Jersey Retirement Ceremony
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman number retirement set for June 13 - Amazin' Avenue
Mets to retire Jerry Koosman's No. 36 in June - Newsday
Jerry Koosman's number retirement, 08/28/2021
Jerry Koosman's No. 36 retired by Mets
Mets to Retire Jerry Koosman's Jersey - The New York Times
Jerry Koosman's No. 36 to Be Retired By Mets in June – NBC New York