Mets retire No. 17 in pre-game ceremony honoring Keith Hernandez - CBS New York
Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets To Retire Jerry Koosman's No. 36 In 2020 - Metsmerized Online
Mets retire Jerry Koosman's No. 36 in Citi Field ceremony
Mets Announce Plans to Retire Jerry Koosman's Uniform #36, by New York Mets
Jerry Koosman's No 36 to be retired by Mets in June
Jerry Koosman's Mets number retirement is finally here
Mets honor Jerry Koosman with overdue jersey retirement
Jerry Koosman Jersey Retirement Ceremony
Mets to Retire Jerry Koosman's Jersey - The New York Times
Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN
Mets to retire Keith Hernandez's No. 17 in July