The organized study of baseball statistics to give objective, empirical evidence in measurement of in-game activity. The term is based on the acronym Society for American Baseball Research (SABR), which pioneered the use of statistics to analyze the game and its players.
Sabermetrics often go far beyond the typical numbers such as batting average and earned run average to such measures as VORP (Value Over Replacement Player), which measures a player's value in all areas as compared to his replacements in the course of a given season, or OPS (On base plus slugging percentage), which gives an indication of a batter's ability to combine hitting, drawing walks and getting extra base hits. Such advanced numbers are often combined into algorithms to determine a player's effectiveness.
Sabermetrics revolutionized the game of baseball for some teams, as the movie "Moneyball" (2011) portrayed. Several teams in the late 1990s and early 2000s quickly adopted the practice of analyzing new combinations of detailed statistics to determine player values when it came time to draft or trade them. Such numbers give a quantifiable number value to players, an objective standard that many general managers and personnel directors rely on to quickly evaluate their own players and prospective players. It should be noted that not all general managers jumped on the sabermetric bandwagon when it launched, and debates between a typical scout's evaluation vs. sabermetric analysis continued even as the number of player measurements mushroomed in the 1990s and 2000s.