Should the Cubs retire Jon Lester's number? - Bleed Cubbie Blue
$155 million richer, Lester is Cubs believer
Jon Lester discusses free-agent process and possibility of retirement after 2021 MLB season
Jon Lester retires
Is Jon Lester a Hall of Famer? - Last Word On Baseball
Jon Lester hangs in there after rough first vs Orioles in Nationals Park - Federal Baseball
Former Cubs, Red Sox pitcher Jon Lester announces retirement
Jon Lester, former Cubs, Red Sox pitcher, announces retirement
Cubs congratulate Jon Lester on career after announcing retirement
Jon Lester announces his retirement after long career with Boston Red Sox and Chicago Cubs - Over the Monster