Bigleaguers.com
Statistics, chat, information about players, news, and instruction.
http://bigleaguers.yahoo.com/

CBS.SportsLine.com - Players
MLB information including team rosters, players of the week, position listings, fantasy information, and statistics.
http://www.sportsline.com/mlb/players

CNN/SI - Baseball Players
Listing of all players, sorted by position and team, including physical player information, as well as game, season, and career statistics.
http://sportsillustrated.cnn.com/baseball/mlb/players/

ESPN.com: All MLB Players
A list of all MLB players organized by position and last name.
http://sports.espn.go.com/mlb/players

JapaneseBallPlayers
Information on Japanese baseball players who play in Major League Baseball. Also includes some information on Korean pitchers and minorleaguers.
http://www.japaneseballplayers.com

Legends of the Game
Profiles of players from the Deadball Era.
http://www.deadball.com/

Player Statistics Index
Complete statistics for every player in major league history.
http://www.baseball-reference.com/players.shtml

Prospect Watch
Guide to college baseball recruiting, minor leagues, tryout camps and the amateur draft.
http://www.angelfire.com/vt/prospectwatch/

Sportspic - Canadian Born Players
Listing of Canadian born Major League players, featuring details, history, and career statistics.
http://www.sportspic.com/cndsports/cndmlb.htm

The Dead Ball Era
Dedicated to the memory of deceased major league players. Includes Hall of Fame members, bizarre incidents, murders, suicides, and various categories of players plus grave photos, necrology by location, and background stories.
http://www.thedeadballera.com/

USATODAY.com - MLB Team Rosters
Listing of current players and information by team.
http://www.usatoday.com/sports/baseball/rosters.htm