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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] |
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] |
Runs Created
Runs created (RC) is a baseball statistic invented by Bill James to estimate the number of runs a hitter contributes to their team. Purpose 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. Willie McCovey hit .270 in his career, with 353 doubles, 46 triples, 521 home runs and 1,345 walks -- but his job was not to hit doubles, nor to hit singles, nor to hit triples, nor to draw walks or even hit home runs, but rather to put runs on the scoreboard. How many runs resulted from all of these things? Runs created attempts to answer this bedrock question. The conceptual framework of the "runs created" stat is: RC = \frac where *A = On-base factor *B = Advancement factor *C = Opportunity factor Formula Basic runs created In the most basic runs cre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bill James
George William James (born October 5, 1949) is an American baseball writer, historian, and statistician whose work has been widely influential. Since 1977, James has written more than two dozen books devoted to baseball history and statistics. His approach, which he termed sabermetrics in reference to the Society for American Baseball Research (SABR), scientifically analyzes and studies baseball, often through the use of statistical data, in an attempt to determine why teams win and lose. In 2006, ''Time'' named him in the ''Time'' 100 as one of the most influential people in the world. In 2003, James was hired as senior advisor on Baseball Operations for the Boston Red Sox and worked for the team for 17 years during which they won four World Series championships. Early life James was born in Holton, Kansas; his mother died in 1954 when he was five. His father was a janitor and a handyman. After four years at the University of Kansas (KU) residing at Stephenson Scholarship H ... [...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 statist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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 Statistics
Baseball statistics play an important role in evaluating the progress of a player or team. Since the flow of a baseball game has natural breaks to it, and normally players act individually rather than performing in clusters, the sport lends itself to easy record-keeping and statistics. Statistics have been kept for professional baseball since the creation of the National League and American League, now part of Major League Baseball. Many statistics are also available from outside Major League Baseball, from leagues such as the National Association of Professional Base Ball Players and the Negro leagues, although the consistency of whether these records were kept, of the standards with respect to which they were calculated, and of their accuracy has varied. Development The practice of keeping records of player achievements was started in the 19th century by Henry Chadwick. Based on his experience with the sport of cricket, Chadwick devised the predecessors to modern-day statist ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Runs Batted In
A run batted in (RBI; plural RBIs ) is a statistic in baseball and softball that credits a batter for making a play that allows a run to be scored (except in certain situations such as when an error is made on the play). For example, if the batter bats a base hit which allows a teammate on a higher base to reach home and so score a run, then the batter gets credited with an RBI. Before the 1920 Major League Baseball season, runs batted in were not an official baseball statistic. Nevertheless, the RBI statistic was tabulated—unofficially—from 1907 through 1919 by baseball writer Ernie Lanigan, according to the Society for American Baseball Research. Common nicknames for an RBI include "ribby" (or "ribbie"), "rib", and "ribeye". The plural of "RBI" is a matter of "(very) minor controversy" for baseball fans:; it is usually "RBIs", in accordance with the usual practice for pluralizing initialisms in English; however, some sources use "RBI" as the plural, on the basis that ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Runs (baseball Statistics)
In baseball, a run is scored when a player advances around first, second and third base and returns safely to home plate, touching the bases in that order, before three outs are recorded and all obligations to reach base safely on batted balls are met or assured. A player may score by hitting a home run or by any combination of plays that puts him safely "on base" (that is, on first, second, or third) as a runner and subsequently brings him home. Once a player has scored a run, they may not attempt to score another run until their next turn to bat. The object of the game is for a team to score more runs than its opponent. The Official Baseball Rules hold that if the third out of an inning is a force out of a runner advancing to any base then, even if another baserunner crosses home plate before that force out is made, his run does not count. However, if the third out is not a force out, but a tag out, then if that other baserunner crosses home plate before that tag out is made, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sabermetrics
Sabermetrics, or originally SABRmetrics, is the empirical analysis of baseball, especially baseball statistics that measure in-game activity. Sabermetricians collect and summarize the relevant data from this in-game activity to answer specific questions. The term is derived from the acronym SABR, which stands for the Society for American Baseball Research, founded in 1971. The term "sabermetrics" was coined by Bill James, who is one of its pioneers and is often considered its most prominent advocate and public face. Early history Henry Chadwick, a sportswriter in New York, developed the box score in 1858. This was the first way statisticians were able to describe the sport of baseball by numerically tracking various aspects of game play. The creation of the box score has given baseball statisticians a summary of the individual and team performances for a given game. Sabermetrics research began in the middle of the 20th century with the writings of Earnshaw Cook, one of the earl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stolen Base
In baseball, a stolen base occurs when a runner advances to a base to which they are not entitled and the official scorer rules that the advance should be credited to the action of the runner. The umpires determine whether the runner is safe or out at the next base, but the official scorer rules on the question of credit or blame for the advance under Rule 10 (Rules of Scoring) of the MLB's Official Rules. A stolen base most often occurs when a base runner advances to the next base while the pitcher is pitching the ball to home plate. Successful base stealers are not only fast but have good base-running instincts and timing. Background Ned Cuthbert, playing for the Philadelphia Keystones in either 1863 or 1865, was the first player to steal a base in a baseball game, although the term ''stolen base'' was not used until 1870. For a time in the 19th century, stolen bases were credited when a baserunner reached an extra base on a base hit from another player. For example, if a ru ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Double (baseball)
In baseball, a double is the act of a batter striking the pitched ball and safely reaching second base without being called out by the umpire, without the benefit of a fielder's misplay (see error) or another runner being put out on a fielder's choice. A double is a type of hit (the others being the single, triple and home run) and is sometimes called a "two-bagger" or "two-base hit". For statistical and scorekeeping purposes it is denoted by 2B. Description Typically, a double is a well-hit ball into the outfield that finds the "gap" between the center fielder and one of the corner outfielders, bounces off the outfield wall and down into the field of play, or is hit up one of the two foul lines. To hit many doubles, a batter must have decent hitting skill and power; it also helps to run well enough to beat an outfield throw. Doubles typically drive in runs from third base, second base, and even from first base at times. When total bases and slugging percentages are ca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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