Sports Reference, LLC is a company which operates several sports-related websites including Baseball Reference, Pro Football Reference, Basketball Reference, and Hockey Reference. The site also includes sections on college football, college basketball and the Olympics. The sites attempt a comprehensive approach to sports data. For example, Baseball Reference contains more than 100,000 box scores and Pro Football Reference contains data on every scoring play in the National Football League since 1941.
The company, which is based in Philadelphia, was founded as Sports Reference in 2004 and was incorporated as Sports Reference LLC in 2007.