Mets announce Jerry Koosman number retirement date –
Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
Jerry Koosman's No 36 to be retired by Mets in June
Jerry Koosman to Have Number Retired on August 28, 2021 - Metsmerized Online
Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN
Jerry Koosman: NY Mets legend on jersey retirement, World Series
Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement
Mets announce Jerry Koosman number retirement date
Jerry Koosman Jersey Retirement Ceremony, Watch live as we retire Jerry Koosman's number 36., By New York Mets