Statistical reference offering a collection of graphs from Major League Baseball. Site also features news and an editor blog.

Offers player and team analysis in addition to information on the book.

Site dedicated to the analysis of baseball, offering information and resources for game players and sabermetricians. Includes simulations and essays.

Offers sabermetric statistics for the Red Sox organization. With a glossary, prospects, and pitching and hitting data.

Official site offering organizational data, research and publications information, news, and a list of awards.