Former Red Sox ace Jon Lester, three-time World Series champ, retires after 16 seasons - The Boston Globe

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Los Angeles Angels rally off closer Jonathan Papelbon, beat Boston Red Sox in Game 3 to sweep ALDS – New York Daily News

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Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN

What the Red Sox value about J.D. Martinez - The Boston Globe

Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN

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Jon Lester-Max Scherzer a marquee matchup - The Boston Globe

Jon Lester retires: Former Red Sox, Cubs ace concludes 16-year career - Sports Illustrated

Former Cubs, Red Sox pitcher Jon Lester retires with 200 wins, 3 World Series rings - The Athletic