Baseball-Reference
http://www.baseball-reference.com
Baseball Almanac
http://www.baseball-almanac.com
Retrosheet
http://retrosheet.org
Baseball Musings
http://www.baseballmusings.com
Baseball Hall of Fame
http://www.baseballhalloffame.org
Baseball Fever
http://baseball-fever.com/archive/index.php
Baseball Archive
http://www.baseball1.com
Baseball Library
http://www.baseballlibrary.com/baseballlibrary
Negro Leagues Baseball Museum
http://www.nlbm.com
Baseball Historian
http://www.baseballhistorian.com/index.htm
Shoeless Joe Jackson Virtual Hall of Fame
http://www.blackbetsy.com