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MLB Rumors: Jon Lester has retired - Lone Star Ball
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Jon Lester just retired, and the KC Royals won't miss him
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Red Sox, Cubs pitcher Jon Lester retires after 16 years, 3 World Series titles
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Jon Lester Retires After 16 Seasons, Established Legendary Career Despite Hitting Just 4 Home Runs - Cubs Insider
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Former Cubs, Red Sox pitcher Jon Lester announces retirement
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MLB News: Jon Lester announces retirement - Beyond the Box Score
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RUN ITS COURSE': Ex-Red Sox, Cubs ace Jon Lester to retire
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Jon Lester Can't Throw to First Base. So Why Aren't Opponents Running Wild? - WSJ
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Column: Why Chicago Cubs should retire Jon Lester's number
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Nationals, Cardinals Swap Jon Lester For Lane Thomas - MLB Trade Rumors
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Chicago Cubs: Jon Leter's Personal Catcher Has Retired - What Now?
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MLB veteran pitcher Jon Lester retires after 16 seasons
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Former MLB GM on Jon Lester's Retirement and Hall of Fame Chances
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Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN
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Jon Lester announces retirement from MLB after 16 seasons