Baseball Library - Presents general information about each team that includes history, chronology and alumni profiles. - http://www.baseballlibrary.com/baseballlibrary/teams/
Baseball Reference - Comprehensive historical statistics for all players. Also offers career registers and leader boards for every major league team. - http://www.baseball-reference.com/teams/
MLB Baseball Teams - Includes information on each team, history, statistics, players and stadiums. - http://www.mlb-teams.com/