A look back at Jon Lester's career - Beyond the Box Score
Jon Lester retires: Five-time All-Star and three-time World Series champion calls it a career after 16 seasons
Jon Lester: Cubs veteran has no hard feelings towards Red Sox
Jon Lester, former Cubs, Red Sox pitcher, announces retirement
Cubs' Jon Lester picks off Tommy Pham at first
Is Jon Lester a Hall of Famer? John Lackey has a strong take – NBC Sports Boston
Former Red Sox ace Jon Lester, three-time World Series champ, retires after 16 seasons - The Boston Globe
Former Cubs, Red Sox pitcher Jon Lester announces retirement
MLB Rumors: Jon Lester has retired - Lone Star Ball
A. J. Pierzynski - Wikipedia
Jon Lester retires