Former Cubs, Red Sox pitcher Jon Lester announces retirement
Former Cubs pitcher Jon Lester, part of team's World Series core, announces his retirement - Chicago Sun-Times
Is Jon Lester a Hall of Famer? - Last Word On Baseball
Jon Lester hits free agency after Cubs decline option; is a Boston Red Sox reunion possible?
Red Sox' Pitching Change Is Paying Off - The New York Times
Two cities, one legend: Jon Lester reflects on one of a kind career with Sox, Cubs, Sports
Jon Lester retires after epic MLB career as Red Sox, Cubs ace - Sports Illustrated
An update on Javier Báez, Kris Bryant, Anthony Rizzo and other former Cubs - Bleed Cubbie Blue
Jon Lester: Former Chicago Cubs, Boston Red Sox ace retires
RUN ITS COURSE': Ex-Red Sox, Cubs ace Jon Lester to retire
Longtime Red Sox ace Jon Lester retires after 16 MLB seasons, Red Sox
Former Red Sox pitcher Jon Lester pops up at Fenway to catch up with some old friends - The Boston Globe
Cubs' Jon Lester goes for 13th straight 30-start season - Chicago Sun-Times
Former St. Louis Cardinals pitcher Jon Lester decides to retire
Jon Lester retires after epic MLB career as Red Sox, Cubs ace - Sports Illustrated