So, I created a chart of each stadium, and how far it was from various transit modes. And then I mapped it out:
A few notes:
- 28 ballparks lie within half a mile of some transit option. (The exceptions: Arlington, Texas—which doesn't even have transit within the city limits!—and Kansas City, have bus stops less than a mile away.)
- 3 cities have no rail transit but do have bus service. Miller Park, built with huge parking lots for tailgaiting Wisconsinites, is the only one of these ballparks more than a quarter mile from the nearest bus stop.
- Boston, Baltimore and Toronto have all four transit options within half a mile of the stadium. (In Boston, the Green Line, despite carrying more passengers than several subway systems, is classified as light rail; the Orange Line, half a mile away, is the heavy rail option.)
- Denver is opening a multi-modal station near the current ballpark, this reflects the projected opening next year.
- The Braves new ballpark will be nearly a mile from the nearest bus stop, putting it in the company of Texas and Kansas City.
- Historically, ballparks were often further from the city center, and served mainly by streetcars, even in cities with subways. Braves Field, Shibe Park, Ebbets Field and the Polo Grounds were all closer to streetcars than to subways. (And note that Fenway Park, Yankee Stadium, and both ballparks in Chicago are not in the downtown core.)

