Sf Stats 
Provides soccer, basketball, handball and icehockey statistics from many leagues worldwide.
http://www.sfstats.net/Statistics in Sports - Section of the American Statistical Association
Promotes publications devoted to statistical theory and methodology and their application to statistics in sports.
http://www.amstat.org/sections/sis/
Journal of Quantitative Analysis in Sports
Articles come from a wide variety of sports and perspectives and deal with tournament structure, and frequency and occurrence of records
http://www.bepress.com/jqas/
Sportheory: College Sports Rankings
Calculates various rankings and statistics of college teams: football, basketball, baseball and ice hockey.
http://sportheory.com
Operations Research in Sports
Promotes research, theory, methodologies, and applications of operations research and management science to sports problems.
http://www.cba.uc.edu/or_sports/
