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Mets retiring No. 36 of ex-pitcher Koosman in '20 - ESPN
Jerry Koosman Jersey Retirement Ceremony
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Mets Retire Legendary Pitcher Jerry Koosman's No. 36 - Sports
Mets to Retire Jerry Koosman's Jersey - The New York Times
Mets pay tribute to Willie Mays at Old-Timers' Day by retiring his
Mets' Jerry Koosman is finally getting the respect he is due