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Equivalent Average
Equivalent Average (EqA) is a baseball metric invented by Clay Davenport and intended to express the production of hitters in a context independent of park and league effects. It represents a hitter's productivity using the same scale as batting average. Thus, a hitter with an EqA over .300 is a very good hitter, while a hitter with an EqA of .220 or below is poor. An EqA of .260 is defined as league average. The date EqA was invented cannot readily be documented, but references to it were being offered on the rec.sport.baseball usenet group as early as January 14, 1996. Baseball Prospectus renamed it True Average (TAv) in 2010, in an attempt to make it more accessible. Definition and rationale In the formula given in the box above, the abbreviations are: H=Hit, TB=Total bases, BB=Bases on balls (walks), HBP=Hit by pitch, SB=Stolen base, SH=Sacrifice hit (typically, sacrifice bunt), SF=Sacrifice fly, AB=At bat, CS=Caught stealing. EqA is one of several sabermetric approaches w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baseball
Baseball is a bat-and-ball sport played between two teams of nine players each, taking turns batting and fielding. The game occurs over the course of several plays, with each play generally beginning when a player on the fielding team, called the pitcher, throws a ball that a player on the batting team, called the batter, tries to hit with a bat. The objective of the offensive team (batting team) is to hit the ball into the field of play, away from the other team's players, allowing its players to run the bases, having them advance counter-clockwise around four bases to score what are called " runs". The objective of the defensive team (referred to as the fielding team) is to prevent batters from becoming runners, and to prevent runners' advance around the bases. A run is scored when a runner legally advances around the bases in order and touches home plate (the place where the player started as a batter). The principal objective of the batting team is to have a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Baseball Prospectus
Baseball Prospectus (BP) is an organization that publishes a website, BaseballProspectus.com, devoted to the sabermetric analysis of baseball. BP has a staff of regular columnists and provides advanced statistics as well as player and team performance projections on the site. Since 1996 the BP staff has also published a ''Baseball Prospectus'' annual as well as several other books devoted to baseball analysis and history. Baseball Prospectus has originated several popular new statistical tools that have become hallmarks of baseball analysis. Baseball Prospectus is accredited by the Baseball Writers' Association of America. Four of Baseball Prospectus's current regular writers are members of the Baseball Writers' Association of America and thus eligible to vote for nominees for Major League Baseball's post-season awards and the Baseball Hall of Fame. Prospectus Entertainment Ventures, LLC Baseball Prospectus is formally an entity of Prospectus Entertainment Ventures, LLC, a pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Value Over Replacement Player
In baseball, value over replacement player (or VORP) is a statistic popularized by Keith Woolner that demonstrates how much a hitter or pitcher contributes to their team in comparison to a replacement-level player who is an average fielder at that position and a below average hitter. A replacement player performs at "replacement level," which is the level of performance an average team can expect when trying to replace a player at minimal cost, also known as "freely available talent." Usage VORP's usefulness is in the fact that it measures the marginal utility of individual players. Other statistics compare individual players to the league average, which is good for cross-era analysis. For example, 90 runs created in 1915 are much better than 90 runs created in 1996, because runs were more scarce in 1915. However, league average comparisons such as Runs Created are not as informative when considering a player's total contribution to a team. VORP is a cumulative or counting stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Total Player Rating
Total player rating (TPR), also known as Batter-Fielder/Pitcher Wins (BFW/PW) is a metric for measuring the value of baseball players, and to enable players to be compared against each other even when they played for different teams, at different positions, and in different eras. It was developed by sabermetrician Pete Palmer and was popularized in the ''Total Baseball'' series of encyclopedias during the 1980s. Total player rating is computed using linear weights, in which each event in a baseball game (for instance, a base on balls, a double or a stolen base) is assigned a value in runs. Each player then has a rating in Batting Runs, Pitching Runs, and Fielding Runs, usually adjusted for park and position, and the sum of these values is divided by 10 and is expressed as an offset in games from an "average" baseball player. Thus, a star player in a season might have been worth 6 games more than an average player, while a scrub might be 5 games below average. The justification fo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rany Jazayerli
Rany Jazayerli (born June 14, 1975), a Chicago-area dermatologist, is a co-founder of and writer for Baseball Prospectus. He developed the statistical concept of Pitcher Abuse Points (PAP), which relates to high pitch counts in baseball. Jazayerli is a graduate of Johns Hopkins University and the University of Michigan School of Medicine. He is a board-certified dermatologist and a Fellow of the American Academy of Dermatology. Works Since 1996 Jazayerli has co-authored many of the annual ''Baseball Prospectus'' volumes. He also writes occasional “Doctoring the Numbers” columns foBaseballProspectus.comin which he investigates topics from a sabermetric perspective. He is the creator of the sabermetric measure of "Pitcher Abuse Points." Jazayerli has published seminal research on the relative merits of the 4-man and 5-man pitching rotation. His most important recent major research contribution is a series of twelve articles published on BaseballProspectus.com in 2005-20 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Joe Sheehan
Joseph S. Sheehan was born in New York City on February 26, 1971, and attended Regis High School. He graduated from the University of Southern California in 1994 with a degree in journalism. Sheehan lives in the New York City area. He is one of the founders and was a co-editor of the first annual book of sabermetric baseball forecasts and analyses by Baseball Prospectus Baseball Prospectus (BP) is an organization that publishes a website, BaseballProspectus.com, devoted to the sabermetric analysis of baseball. BP has a staff of regular columnists and provides advanced statistics as well as player and team perf ... in 1996 as well as several later volumes. On October 10, 2007, Sheehan took on an additional role as Managing Editor of the newly founded Basketball Prospectus. As of December 31, 2009, Sheehan no longer worked for Baseball Prospectus. However, he continued to make occasional contributions to BP's "Unfiltered" blog. At the beginning of the 2010 baseball sea ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Christina Kahrl
Christina Kahrl is one of the co-founders of Baseball Prospectus. She is the former executive editor of the think tank's website, BaseballProspectus.com, the former managing editor for their annual publication, former writer and editor for ESPN.com, and is currently sports editor oThe San Francisco Chronicle She is a member of the Baseball Writers' Association of America. Kahrl is an activist on civil rights issues for the transgender community in her hometown of Chicago and a member of the Equality Illinois board of directors. The story of her coming out as a transgender sportswriter in 2003 was part of a GLAAD award-nominated segment entitled "Transitions" on HBO's ''Real Sports'' that aired in 2010. Background Kahrl graduated from El Camino High School in Sacramento, California in 1985. She graduated from the University of Chicago in 1990, with a concentration in Modern European History and a minor concentration in Ancient History. She was a member of Phi Kappa Psi fraternity. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
PECOTA
PECOTA, an acronym for ''Player Empirical Comparison and Optimization Test Algorithm'', is a sabermetric system for forecasting Major League Baseball player performance. The word is a backronym based on the name of journeyman major league player Bill Pecota, who, with a lifetime batting average of .249, is perhaps representative of the typical PECOTA entry. PECOTA was developed by Nate Silver in 2002–2003 and introduced to the public in the book ''Baseball Prospectus 2003''. Baseball Prospectus (BP) has owned PECOTA since 2003; Silver managed PECOTA from 2003 to 2009. Beginning in Spring 2009, BP assumed responsibility for producing the annual forecasts, making 2010 the first baseball season for which Silver played no role in producing PECOTA projections.Nate Silver and Kevin Goldstein, "State of the Prospectus: Spring 2009,BaseballProspectus.com, March 24, 2009. One of several widely publicized statistical systems of forecasts of player performance, PECOTA player forecasts are mar ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Home Run
In baseball, a home run (abbreviated HR) is scored when the ball is hit in such a way that the batter is able to circle the bases and reach home plate safely in one play without any errors being committed by the defensive team. A home run is usually achieved by hitting the ball over the outfield fence between the foul poles (or hitting either foul pole) without the ball touching the field. Far less common is the "inside-the-park" home run where the batter reaches home safely while the baseball is in play on the field. When a home run is scored, the batter is credited with a hit and a run scored, and a run batted in ( RBI) for each runner that scores, including himself. Likewise, the pitcher is recorded as having given up a hit and a run, with additional runs charged for each runner that scores other than the batter. Home runs are among the most popular aspects of baseball and, as a result, prolific home run hitters are usually the most popular among fans and consequently th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clay Davenport
Clay Davenport is a baseball sabermetrician who co-founded Baseball Prospectus (BP) in 1996. He co-edited several of the ''Baseball Prospectus'' annual volumes and is a writer for BaseballProspectus.com. Much of his work for BP was behind the scenes, where he maintained and implemented advanced statistics for the website. For most of the time during which he contributed to Baseball Prospectus, Davenport's main employment was as a meteorologist. In March 2010, it was announced that he had moved to full-time status at Baseball Propectus. In 2011, he departed Baseball Prospectus, but maintains his own website ''ClayDavenport.com'' on which he continues to publish baseball analysis and projections. As he commented there in May 2011:As my title indicates, this is a place for me to keep some statistics I happen to care about. These are statistics that I've run at Baseball Prospectus for many years, but BP has decided to discontinue them – or at least transform into something I no longe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pacific Coast League
The Pacific Coast League (PCL) is a Minor League Baseball league that operates in the Western United States. Along with the International League, it is one of two leagues playing at the Triple-A (baseball), Triple-A level, which is one grade below Major League Baseball (MLB). The PCL was one of the premier regional baseball leagues in the first half of the 20th century. Although it was never recognized as a true major league, to which it aspired, its quality of play was considered very high. A number of top stars of the era, including Joe DiMaggio and Ted Williams, were products of the league. In 1958, with the arrival of major league teams on the west coast and the availability of televised major league games, the PCL's modern era began with each team signing Player Development Contracts to become farm teams of major league clubs. Following MLB's reorganization of the minor leagues in 2021, it operated as the Triple-A West for one season before switching back to its previous mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Major League Baseball
Major League Baseball (MLB) is a professional baseball organization and the oldest major professional sports league in the world. MLB is composed of 30 total teams, divided equally between the National League (NL) and the American League (AL), with 29 in the United States and 1 in Canada. The NL and AL were formed in 1876 and 1901, respectively. Beginning in 1903, the two leagues signed the National Agreement and cooperated but remained legally separate entities until 2000, when they merged into a single organization led by the Commissioner of Baseball. MLB is headquartered in Midtown Manhattan. It is also included as one of the major professional sports leagues in the United States and Canada. Baseball's first all-professional team, the Cincinnati Red Stockings, was founded in 1869. Before that, some teams had secretly paid certain players. The first few decades of professional baseball were characterized by rivalries between leagues and by players who often jumped from one te ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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