The Baseball Research Collection at the San Diego Library

 

The Sullivan Family Baseball Research Center at the San Diego Library is the largest baseball research center outside of the Baseball Hall of Fame in Cooperstown, NY. The center was founded in 1998:

Oakland A's Media Guides from the 80's

And there is a strong San Diego influence:

And it had two books that I used to love to read every year when they came out:

The Sullivan Family Baseball Research Center at the San Diego Library is a super cool and I literally spent about 6 hours there.