Statistics

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
www.bepress.com/jqas/

Operations Research in Sports - Promotes research, theory, methodologies, and applications of operations research and management science to sports problems.
www.cba.uc.edu/or_sports/

Sf Stats - Provides soccer, basketball, handball and icehockey statistics from many leagues worldwide.
www.sfstats.net/

Sportheory: College Sports Rankings - Calculates various rankings and statistics of college teams: football, basketball, baseball and ice hockey.
sportheory.com

Statistics in Sports - Section of the American Statistical Association - Promotes publications devoted to statistical theory and methodology and their application to statistics in sports.
www.amstat.org/sections/sis/