As I walked around, I recalled that the White Sox won the World Series in 2005, the Bulls dominated basketball in the 1990s, and the Bears won the Super Bowl in 1986.
So here’s a hypothesis: In the last quarter-century, Chicago is the only city to have won the championship in all four major North American sports.
New York, Boston, Philadelphia, Los Angeles, Dallas, Pittsburgh, and Detroit have all been very successful. But have they won all four?
From Wikipedia, here are lists of the championship winners:
Update: What about soccer? More complicated in the U.S., but here’s the list of U.S. Major League Soccer Champions. The Chicago Fire won in 1998.