Why Cubs' Lester turned down a bigger offer from Giants

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

Longtime Red Sox and Cubs ace Jon Lester announces retirement

Chris Sale, Jon Lester are Pitchers of Month

World Series: How the Chicago Cubs and Cleveland Indians match up – The Denver Post

Former Cubs pitcher Jon Lester retires after 16 seasons

David Ross, Jon Lester lead Cubs' 99th win

MLB hot stove: SF Giants linked to five-time All-Star lefty Lester – Daily Democrat

Carlos Correa Mets contract latest offseason blow to Giants, San Francisco News

Red Sox Jon Lester Vs. David Price: A Tale of Two Pitchers

Jon Lester draws comparison between Cubs and Sox signings - Marquee Sports Network

In San Francisco, a series win, pitching order restored and Lester arrived with huge hit - Blog

Jon Lester Retires After 16 MLB Seasons; Won 3 World Series with Red Sox and Cubs, News, Scores, Highlights, Stats, and Rumors

The Giants' quiet offseason doesn't mean they're cheap - McCovey Chronicles

With Jon Lester signing, Cubs shake up the baseball world – Orlando Sentinel

Javier Baez's solo shot is difference in Cubs' 1-0 win over Giants in NLDS opener - Los Angeles Times