League Name My Team Starting Year Year I joined Description 
This Week In Baseball League Cleveland Indians 1884 1884 A recreation of baseball starting in 1884
Mid-Century Baseball League Toronto Blue Jays and Montreal Expos 1950 1950 A recreation of baseball starting in 1950.
This Week In Baseball - Next Try Baseball League Chicago Cubs 1918 1918 A recreation of baseball starting in 1918.

Baseball Almanac

Baseball Reference

CNN/SI

Major League Baseball

ESPN - baseball

Interesting Baseball Trivia Info

Website for the best baseball simulation game:

Out of the Park Baseball by OOTP Developments

League website for a league I used to run.

Classic Internet Baseball League