Former Cubs, Red Sox pitcher Jon Lester announces retirement
Longtime Red Sox ace Jon Lester retires after 16 MLB seasons
MLB veteran pitcher Jon Lester retires after 16 seasons
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Jon Lester - Wikipedia
Longtime Red Sox ace Jon Lester retires after 16 MLB seasons
Jon Lester out of the equation for Cubs' Opening-Day starter
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Maybe the best playoff pitcher ever': What made Jon Lester an
Jon Lester, former Cubs, Red Sox pitcher, announces retirement
Veteran Pitcher Lester Retires
Red Sox' Pitching Change Is Paying Off - The New York Times