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Weighted On-base Average
In baseball, wOBA ( /'woʊbə/, or weighted on-base average) is a statistic, based on linear weights, designed to measure a player's overall offensive contributions per plate appearance. It is formed from taking the observed run values of various offensive events, dividing by a player's plate appearances, and scaling the result to be on the same scale as on-base percentage. Unlike statistics like OPS, wOBA attempts to assign the proper value for each type of hitting event. It was created by Tom Tango and his coauthors for ''The Book: Playing the Percentages in Baseball''. Usage In 2008, sabermetrics website FanGraphs began listing the current and historical wOBA for all players in Major League Baseball. It forms the basis of the offensive component of their wins above replacement (WAR) metric. Sites such as The Hardball Times have studied wOBA and found it to perform comparably to or better than other similar tools (OPS, RC, etc.) used in sabermetrics to estimate runs. ''The B ... [...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] |
Base On Balls
A base on balls (BB), also known as a walk, occurs in baseball when a batter receives four pitches that the umpire calls '' balls'', and is in turn awarded first base without the possibility of being called out. The base on balls is defined in Section 2.00 of baseball's Official Rules, and further detail is given in 6.08(a). It is considered a faux pas for a professional player to literally walk to first base; the batter-runner and any advancing runners normally jog on such a play. The term "base on balls" distinguishes a walk from the other manners in which a batter can be awarded first base without liability to be put out (e.g., hit by pitch (HBP), catcher's interference). Though a base on balls, catcher's interference, or a batter hit by a pitched ball all result in the batter (and possibly runners on base) being awarded a base, the term "walk" usually refers only to a base on balls, and not the other methods of reaching base without the bat touching the ball. An importan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Error (baseball)
In baseball statistics, an error is an act, in the judgment of the official scorer, of a fielder misplaying a ball in a manner that allows a batter or baserunner to advance one or more bases or allows a plate appearance to continue after the batter should have been put out. The term ''error'' is sometimes used to refer to the play during which an error was committed. Relationship to other statistical categories An error does not count as a hit but still counts as an at bat for the batter unless, in the scorer's judgment, the batter would have reached first base safely but one or more of the additional bases reached was the result of the fielder's mistake. In that case, the play will be scored both as a hit (for the number of bases the fielders should have limited the batter to) ''and'' an error. However, if a batter is judged to have reached base solely because of a fielder's mistake, it is scored as a "reach on error (ROE)," and treated the same as if the batter had been put o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sacrifice Flies
In baseball, a sacrifice fly (sometimes abbreviated to sac fly) is defined by Rule 9.08(d): "Score a sacrifice fly when, before two are out, the batter hits a ball in flight handled by an outfielder or an infielder running in the outfield in fair or foul territory that # is caught, and a run scores after the catch, or # is dropped, and a runner scores, if in the scorer's judgment the runner could have scored after the catch had the fly ball been caught." It is called a "sacrifice" fly because the batter allows a teammate to score a run, while sacrificing his own ability to do so. Sacrifice flies are traditionally recorded in box scores with the designation "SF". Rules As addressed within Rule 9.02(a)(1) of the Official Baseball Rules a sacrifice fly is not counted as a time at bat for the batter, though the batter is credited with a run batted in. The same is true with a bases-loaded walk. The purpose of not counting a sacrifice fly as an at-bat is to avoid penalizing hitters ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Base On Balls
A base on balls (BB), also known as a walk, occurs in baseball when a batter receives four pitches that the umpire calls '' balls'', and is in turn awarded first base without the possibility of being called out. The base on balls is defined in Section 2.00 of baseball's Official Rules, and further detail is given in 6.08(a). It is considered a faux pas for a professional player to literally walk to first base; the batter-runner and any advancing runners normally jog on such a play. The term "base on balls" distinguishes a walk from the other manners in which a batter can be awarded first base without liability to be put out (e.g., hit by pitch (HBP), catcher's interference). Though a base on balls, catcher's interference, or a batter hit by a pitched ball all result in the batter (and possibly runners on base) being awarded a base, the term "walk" usually refers only to a base on balls, and not the other methods of reaching base without the bat touching the ball. An importan ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
At Bat
In baseball, an at bat (AB) or time at bat is a batter's turn batting against a pitcher. An at bat is different from a plate appearance. A batter is credited with a plate appearance regardless of what happens during their turn at bat, but a batter is credited with an at bat only if that plate appearance does not have one of the results enumerated below. While at bats are used to calculate certain statistics, including batting average and slugging percentage, a player can qualify for the season-ending rankings in these categories only if they accumulate 502 plate appearances during the season. Batters will not receive credit for an at bat if their plate appearances end under the following circumstances: * They receive a base on balls (BB).In 1887, Major League Baseball counted bases on balls as hits (and thus as at-bats). The result was high batting averages, including some near .500, and the experiment was abandoned the following season. * They are hit by a pitch (HBP). * They ... [...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] |
Triple (baseball)
In baseball, a triple is the act of a batter safely reaching third base after hitting the ball, with neither the benefit of a fielder's misplay (see error) nor another runner being put out on a fielder's choice. A triple is sometimes called a "three-bagger" or "three-base hit". For statistical and scorekeeping purposes it is denoted by 3B. Triples have become somewhat rare in Major League Baseball, less common than both the double and the home run. This is because it requires a ball to be hit solidly to a distant part of the field (ordinarily a line drive or fly ball near the foul line closest to right field), or the ball to take an irregular bounce in the outfield, usually against the wall, away from a fielder. It also requires the batter's team to have a good strategic reason for wanting the batter on third base, as a stand-up double is sufficient to put the batter in scoring position and there will often be little strategic advantage to risk being tagged out whilst tr ... [...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] |
Single (baseball)
In baseball, a single is the most common type of base hit, accomplished through the act of a batter safely reaching first base by hitting a fair ball (thus becoming a runner) and getting to first base before a fielder puts him out. As an exception, a batter-runner reaching first base safely is not credited with a single when an infielder attempts to put out another runner on the first play; this is one type of a fielder's choice. Also, a batter-runner reaching first base on a play due to a fielder's error trying to put him out at first base or another runner out (as a fielder's choice) is not credited with a single. On a single hit to the outfield, any runners on second base or third base normally score, and sometimes the runner from first base is able to advance to third base. Depending on the location of the hit, a quick recovery by the outfielder can prevent such an advance or create a play on the advancing runner. Hitters who focus on hitting singles rather than doubles ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hit By Pitch
In baseball, hit by pitch (HBP) is an event in which a batter or his clothing or equipment (other than his bat) is struck directly by a pitch from the pitcher; the batter is called a hit batsman (HB). A hit batsman is awarded first base, provided that (in the plate umpire's judgment) he made an honest effort to avoid the pitch, although failure to do so is rarely called by an umpire. Being hit by a pitch is often caused by a batter standing too close to, or "crowding", home plate. The rule dates from 1884; before that, a pitch that struck the batter was merely a ball. Official rule Per baseball official rule 5.05(b), a batter becomes a baserunner and is awarded first base when he or his equipment (except for his bat): *is touched by a pitched ball outside the strike zone, *''and'' he attempts to avoid it (or had no opportunity to avoid it), *''and'' he did not swing at the pitch. If all these conditions are met, the ball is dead, and other baserunners advance if they are forced ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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