Baseball-Reference.com - Statistics for each player, team, and league in baseball history. Includes batting, pitching and fielding stats along with leaders, managers, links, books and award winners.
Ask Mister Baseball - Gives complete statistics for all players by typing in there last name.
StatsCentral - Major League Baseball Index - Statistics from 1970 through 1998.
Infoplease Baseball Almanac - Comprehensive database including all-time regular-season, playoff and World Series statistics, leaders, champions and awards dating back to 1876.
Doug's MLB Stats Home Page - Statistics from 1994 to the present divided by team.
Baseball Boxscores - A directory of historic boxscores.
Stolen Bases - Standings, statistics, sports news, and equipment, together with math connections.
Statistics - The Official Site of Major League Baseball - Comprehensive stats from the official source.
USA Today Stats by StatsWizard - Create your own customized statistic reports including any combination of statistics.
FOX Sports: Baseball Statistics - Contains season batting, pitching, and season leader statistics.
