There's a new study that ranks the Best Baseball Cities in America, based on how many Major Leaguers have hailed from each city since 1920. There's also results that rank the most big-league-productive cities since 1990.

What do people think of this study and it's results, and the methodology? Does it make sense?

Here's the study:

http://bitly.com/TqECkU

Is it a coincidence that San Francisco comes out as number one?

Curious to see what some real stat people think.