1. St. Louis
St. Louis and the Cardinals are synonymous. What other team and city can say that? Sometimes it is just as simple as that. The "Best Fans in Baseball" might not always be self-aware — no fan base is, though — but they're all-in on the Cardinals. You can't question that kind of loyalty.
2. San Francisco
San Francisco has one professional sports team that actually plays in San Francisco.
The Warriors — they're in Oakland, for now, right next to the A's. The 49ers play down in Santa Clara, a few miles from the San Jose Sharks' area and just down the road from the Earthquakes.
But the Giants — they're all San Francisco. And with a gorgeous ballpark and a ton of recent success, you can't go more than few feet in The City without seeing the interlocking SF logo. It'll be interesting to see how San Francisco responds to the Giants' poor play early this year and the Warriors' cross-bay move in the years to come, but for now, San Francisco is a baseball town and an elite one at that.
3. Chicago
The Cubs fans showed up for decades of terrible baseball — an allegiance that made the victory all the sweeter last October.
White Sox fans — there aren't many, but they're hardcore.
Chicago might have the Bulls, Blackhawks, and Bears, but it's a city that's divided between the north and south sides — a baseball town.
4. Boston
The city lives and dies with the Red Sox, though they also live and die with the Bruins, Celtics, and Patriots. The post-curse reinvention has been... interesting, to say the least ... but there's no way Boston will ever fall out of the top 5 of this kind of list.
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