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George William James (born October 5, 1949) [1] [2] is an American baseball writer, historian, and statistician whose work has been widely influential. Since 1977, James has written more than two dozen books about baseball history and statistics.
James explains in his book, The Bill James Historical Baseball Abstract, why he believes runs created is an essential thing to measure: With regard to an offensive player, the first key question is how many runs have resulted from what he has done with the bat and on the basepaths.
William Henry "Big Bill" James (January 20, 1887 – May 25, 1942) was a professional baseball pitcher. He played all or part of eight seasons in Major League Baseball between 1911 and 1919. Primarily used as a starting pitcher , he played for the Cleveland Naps (1911–1912), St. Louis Browns (1914–1915), Detroit Tigers (1915–1919), Boston ...
Bill James, who coined the term "sabermetrics". Sabermetrics (originally SABRmetrics) is the original or blanket term for sports analytics in the US, the empirical analysis of baseball, especially the development of advanced metrics based on baseball statistics that measure in-game activity.
Secondary average, or SecA, is a baseball statistic that measures the sum of extra bases gained on hits, walks, and stolen bases (less times caught stealing) depicted per at bat. [1] Created by Bill James, it is a sabermetric measurement of hitting performance that seeks to evaluate the number of bases a player gained independent of batting ...
Pythagorean expectation is a sports analytics formula devised by Bill James to estimate the percentage of games a baseball team "should" have won based on the number of runs they scored and allowed. Comparing a team's actual and Pythagorean winning percentage can be used to make predictions and evaluate which teams are over-performing and under ...
Game score is a metric devised by Bill James as a rough overall gauge of a starting pitcher's performance in a baseball game. It is designed such that scores tend to range from 0–100, with an average performance being around 50 points. [1]
William Lawrence "Seattle Bill" James (March 12, 1892 – March 10, 1971) was an American Major League Baseball pitcher. He was given a nickname to differentiate him from his contemporary, "Big" Bill James. The Braves purchased James in 1912 from the Seattle Giants of the Northwestern League.