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Jerry Koosman - Wikipedia

Jerry Koosman: NY Mets legend on jersey retirement, World Series

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NY Mets to retire pitcher Jerry Koosman's number next season

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Mets pay tribute to Willie Mays at Old-Timers' Day by retiring his iconic No. 24 - Newsday

Mets will retire Jerry Koosman's number in 2020 – New York Daily News

Mets Announce Plans to Retire Jerry Koosman's Uniform #36, by New York Mets

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Mets to retire pitcher Jerry Koosman's number next season