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July 19, 2021: Jon Lester hits a high note, and a homer, as Nationals rout Marlins – Society for American Baseball Research
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Washington National for a minute Jon Lester announces retirement after 16-year career - Federal Baseball
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Jon Lester hits free agency after Cubs decline option; is a Boston Red Sox reunion possible?
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Gregor: Lester, a standout Cubs starter for 6 seasons, calls it a career
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Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN
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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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An update on Javier Báez, Kris Bryant, Anthony Rizzo and other former Cubs - Bleed Cubbie Blue
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Jon Lester, former Boston Red Sox pitcher, retires after 16-year MLB career (report)
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Cubs' Jon Lester goes for 13th straight 30-start season - Chicago Sun-Times
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