You're not allowed to root for both the Cubs and the White Sox — but why?
Chicago Cubs and White Sox Fans, Explained - Thrillist
New York Times maps the support for Brewers, Cubs by ZIP code, Writers
White Sox vs. D-Backs Monday game moved to Thursday, Sox offer $1 tickets and free parking - On Tap Sports Net
Guaranteed Rate Field Policies and Procedures
Up Close on Baseball's Borders - The New York Times
Cubs–White Sox rivalry - Wikipedia
Up Close on Baseball's Borders - The New York Times
What is really the dividing line of Cubs and White Sox Chicago? - Quora