Jon Lester has announced his retirement - Bleed Cubbie Blue
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An update on Javier Báez, Kris Bryant, Anthony Rizzo and other former Cubs - Bleed Cubbie Blue
Jon Lester retires after epic MLB career as Red Sox, Cubs ace - Sports Illustrated
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Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN
Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN
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Jon Lester - Wikipedia
Former Cubs, Red Sox pitcher Jon Lester announces retirement
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