Wikipedia
Fangraphs
FanGraphs.com is a website run by Fangraphs Inc., located in Arlington, Virginia, and created and owned by David Appelman that provides statistics for every player in Major League Baseball history.
On September 18, 2009, Fangraphs Inc. launched an iPhone app in partnership with Hawk Ridge Consulting. Fangraphs has a number of content partners including ESPN, SB Nation and Fanhouse.