Jon Lester's retirement reminds us Red Sox never should have let him go
Former Cubs pitcher Jon Lester retires after 16 seasons
Former Cubs pitcher Jon Lester, part of team's World Series core, announces his retirement - Chicago Sun-Times
Former Cubs, Red Sox pitcher Jon Lester announces retirement National News - Bally Sports
Cubs close to bringing back Jake Arrieta on one-year deal - Chicago Sun-Times
Jon Lester retires: Former Red Sox, Cubs ace concludes 16-year career - Sports Illustrated
Former Red Sox pitcher Jon Lester pops up at Fenway to catch up with some old friends - The Boston Globe
Two cities, one legend: Jon Lester reflects on one of a kind career with Sox, Cubs, Sports
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