Jon Lester announces retirement after 16 seasons, three World Series titles - ESPN
Interview with Jon Lester on his FIRST DAY after Retirement
Jon Lester joins Cardinals
Former Red Sox ace Jon Lester, three-time World Series champ, retires after 16 seasons - The Boston Globe
Jon Lester, former Boston Red Sox pitcher, retires after 16-year MLB career (report)
Jon Lester retires: Five-time All-Star and three-time World Series champion calls it a career after 16 seasons
Jon Lester Announces Retirement - MLB Trade Rumors
Former Red Sox pitcher, World Series champion Jon Lester retiring, report says
Former Cubs pitcher Jon Lester retires after 16 seasons
Jon Lester's 200th career win, in context
SimCity: Calculating the Worst-Case Cost of Jon Lester's Pickoff Aversion
MLB pitcher battles cancer, never quits
With Jon Lester's retirement we ask: How do you define a Hall of Fame starting pitcher? - The Boston Globe