San Francisco Seals - History of the San Francisco professional baseball team that played in the Pacific Coast League (PCL) from 1903 through 1957. - http://www.tdl.com/~thawley/seals.htm
San Francisco 49ers - History of the City's local professional football team. - http://www.sf49ers.com/history
San Francisco Giants History - History of the City's current professional baseball team. - http://sanfrancisco.giants.mlb.com/NASApp/mlb/sf/history/sf_history_timeline.jsp