Jon Lester - Wikipedia
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Cubs All-Time Uniform Number List
MLB Rumors: Jon Lester has retired - Lone Star Ball
The 2015 Cubs By The Numbers - Bleed Cubbie Blue
Is it true that the Chicago Cubs are considering trading Kris Bryant to the Atlanta Braves for a handful of minor league prospects? - Quora
The 2017 Cubs By The Numbers - Bleed Cubbie Blue
Ian Happ wants Cubs to retire Jon Lester's jersey number โ NBC Sports Chicago
Jon Lester has announced his retirement - Bleed Cubbie Blue
2019 Chicago Cubs season - Wikipedia
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Jon Lester Themed Road Trip, Heading out West. ๐ค , By Chicago Cubs