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Mets retire Willie Mays' No. 24 as Old-Timers' Day returns
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1969 World Champion Jerry Koosman Goes Unfiltered With Howie Rose
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Mets retire Willie Mays' No. 24 as Old-Timers' Day returns - NBC Sports
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Humble Jerry Koosman joins Mets hopefully-expanding pantheon with number retirement
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April 23, 1969: Jerry Koosman gets his first win in Mets' miracle season โ Society for American Baseball Research
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Tom Seaver, Mets Hall of Fame pitcher, dies
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New York Mets - Wikipedia
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New York Mets - ๐
The date is set! ๐
We will retire Jerry Koosman's No. 3โฃ6โฃ on Saturday, June 13 in a pre-game ceremony. ๐๏ธ๐
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Mets to Retire Jerry Koosman's Jersey - The New York Times