A Chicago Cubs fan's analysis of when sports fans are allowed to panic, This is the Loop
Cubs legend Jon Lester discusses his decision to retire – NBC Sports Chicago
The Cubs remember some guy named Jake Arrieta: Chicago Baseball Authority - The Athletic
Cubs-pedia -- Everything you need to know about the Lovable Losers - ESPN
MLB Rumors: Jon Lester has retired - Lone Star Ball
Cub o' coffee: Time for some exit interviews (infield edition) - The Athletic
Jon Lester retires after epic MLB career as Red Sox, Cubs ace - Sports Illustrated
Hochman: Lackey, Lester put friendship on hold
Montero's grand slam propels Cubs over Dodgers - The Dickinson Press
Column: Why Chicago Cubs should retire Jon Lester's number