Jon Lester option declined by Cubs, lefty becomes free agent - The San Diego Union-Tribune

Jon Lester retires after epic MLB career as Red Sox, Cubs ace - Sports Illustrated

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Jon Lester agrees to $155m deal with Chicago Cubs, Chicago Cubs

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Former Cubs pitcher Jon Lester, part of team's World Series core, announces his retirement - Chicago Sun-Times

Jon Lester agrees to $155m deal with Chicago Cubs, Chicago Cubs

2014 Kansas Baseball Media Guide by Kansas Jayhawks - Issuu

Cubs Sign Jon Lester For 6 Years, $155 Million - Bleed Cubbie Blue

With Jason Heyward being released by the Cubs today, what is the worst contract a team has awarded a player in modern history? : r/baseball

MLB Power Rankings: Where All 30 Teams Stand After November Hot Stove Action, News, Scores, Highlights, Stats, and Rumors

Cubs needed Jon Lester to end curse, but team just snubbed him