Former Cubs, Red Sox pitcher Jon Lester announces retirement
Jon Lester - Wikipedia
Jon Lester traded to Oakland Athletics, Yoenis Cespedes to Boston Red Sox - ESPN
Jon Lester retires
Red Sox: Jon Lester credits former Boston ace's work ethic as inspiration
Jon Lester would welcome a Red Sox-Cubs World Series - The Boston Globe
Lester Stymies Jeter to Preserve Red Sox' Win - The New York Times
A look back at Jon Lester's career - Beyond the Box Score
Lester, Holt lead Red Sox past Twins
Jon Lester rejects Red Sox, agrees to six-year, $155M deal with Cubs – Boston Herald
Ex-Red Sox teammates John Lackey, Jon Lester headline NLDS opener - The Boston Globe
Red Sox lose out: Lester, Cubs agree to $155M deal
Red Sox Free Agency: Lack of interest in a Jon Lester reunion is baffling
Lester no-hits Royals – The Denver Post