Nothing tricky.
What's the largest US market NOT to have a big four professional sports team?
By big four I mean NFL, MLB, NBA, and NHL
US market, meaning just that.
You can rule out:
NYC/Meadowlands market
LA market
SF/Oak/Bay area market.
Chicago, Dallas/Fort Worth
etc.
So, what is the largest US (Canada excluded) market not to have a professional team.