There is a great deal of baseball information on the web.  Here I try to give a listing of my favorites

BEST OBSCURE AND UNKNOWN SITE:

Encyclopedia of Baseball Catchers.

SITES MOST USED IN CONSTRUCTING PROFILES:

SABR.org        

 Baseball Reference

 Retrosheet

 Baseball Library

 Baseball Almanac

Professional Ballplayer Data Base

SABRmetric Encyclopedia

 Baseball Cube

CNN/SI                      

ESPN

SABR Encyclopedia (for members only)    

SABR Homerun Log (for members only)

SABR Biography Project

The Baseball Index (TBI)

Baseball Page

 stat-junkie

Other Useful Sites.....

EGroups:

     SABRVets        

     AURICLE Profiles

     AURICLE SABR Files      

     AURICLE’s CAULDRON

     Other SABR Egroups    

19th Century Players

At the Yard Magazine

Baseball Archive

Baseball Bluebook

Baseball Engineering Library

Baseball Guru

Baseball Immortals

Baseball Magazine archive

Baseball Primer

Baseball Prospectus

Baseball Reliquary

Baseball Think Factory

Big Bad Baseball

Branch Rickey Landmark

Brassey’s

Chadwick

Cups of coffee

databank

deadball era

gravesites

Harold Seymour

John Skilton’s Links

Library of Congress

Major League Baseball

Minor League Baseball

National Baseball Hall of Fame

Negro League Baseball

Netshrine discussion forum

Scholar’s Bookshelf

Sporting News (TSN)

Stats, Inc.

Toronto Star Player Index

University of Nebraska Press

Voros McCracken