Official websites

International Baseball federation IBAF - www.ibaf.org
European Baseball Confederation - www.baseballeurope.com

MLB

www.mlb.com - official site of the Major League Baseball
Scoreboard: MLB.com, Yahoo! Sports: MLB
Teams:
Arizona Diamondbacks, Atlanta Braves, Baltimore Orioles, Boston Red Sox, Chicago Cubs, Chicago White Sox, Cincinnati Reds, Cleveland Indians, Colorado Rockies, Detroit Tigers, Florida Marlins, Houston Astros, Kansas City Royals, Los Angeles Angels, Los Angeles Dodgers, Milwaukee Brewers, Minnesota Twins, New York Mets, New York Yankees, Oakland Athletics, Philadelphia Phillies, Pittsburgh Pirates, San Diego Padres, San Francisco Giants, Seattle Mariners, St Louis Cardinals, Tampa Bay Rays, Texas Rangers, Toronto Blue Jays, Washington Nationals

EUROPE

European Baseball Confederation
Austria, Belgium, Czech Republic, Denmark, France, Germany, Great Britain, Israel, Italy, Netherlands, Norway, Poland, Sweden, Switzerland

Germany

baseball-softball.de German baseball federation
Bundesliga North: Berlin Sluggers, Bonn Capitals, Dohren Wild Farmers, Dortmund Wanderers, HSV Stealers, Paderborn Untouchables, Pulheim Gophers, Solingen Alligators
Bundesliga South: Bad Homburg Hornets, Buchbinder Legionäre, Gauting Indians, Haar Disciples, Heidenheim Heideköpfe, Mainz Athletics, Mannheim Tornados

Czech Republic

baseball.cz Czech baseball federation
Draci Brno, Hrosi Brno, MZLU Brno, Technika Brno, Skokani Olomouc, Arrows Ostrava, Eagles Praha, Kotlarka Praha

Other Sites

Boston Red Sox - commentary from a Red-headed Boston fan in Yankeeland