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Mets to retire pitcher Jerry Koosman's number next season
Thrilled to be 'joining a great crew,' Jerry Koosman, 78, has jersey retired by New York Mets - ESPN
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Jerry Koosman - Wikipedia
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Mets honor Jerry Koosman with overdue jersey retirement
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Mets to retire numbers for Doc Gooden and Darryl Strawberry – NBC New York
Mets Retire 36 for Koosman - NY Sports Day
Jerry Koosman: All Time Mets Left Handed Pitcher (Part One: 1967-1972)