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

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

Whether it's goodbye or see you later, Jon Lester will always toast to Chicago - The Athletic

Jon Lester Dropped $47,000 on Beer Over the Weekend in an Amazing Gesture To Cubs Fans

Jon Lester to sign with Chicago Cubs - ESPN

extension – Blogging the Red Sox

Jon Lester Can't Throw to First Base. So Why Aren't Opponents Running Wild? - WSJ

1 Perfect Remaining Offseason Target for All 30 MLB Teams, News, Scores, Highlights, Stats, and Rumors

Jon Lester to sign with Chicago Cubs - ESPN

History says $100 million pitchers must produce results fast – The Mercury

Jon Lester to Cubs: Latest Contract Details, Comments, Reaction, News, Scores, Highlights, Stats, and Rumors

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

2013 LAD Media Guide, PDF, Major League Baseball