Former Cubs, Red Sox pitcher Jon Lester announces retirement
Jon Lester hits free agency after Cubs decline option; is a Boston
Jon Lester retires
RUN ITS COURSE': Ex-Red Sox, Cubs ace Jon Lester to retire
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Jon Lester announces retirement from MLB after 16 seasons
Jon Lester Retires After 16 Seasons, Established Legendary Career
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Jon Lester retires after epic MLB career as Red Sox, Cubs ace