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In baseball statistics, strikeouts per nine innings pitched (abbreviated K/9, SO/9, or SO/9IP) is the mean of strikeouts (or Ks) by a pitcher per nine innings pitched. It is determined by multiplying the number of strikeouts by nine, and dividing by the number of innings pitched.
A strikeout is a statistic recorded for both pitchers and batters, and is usually denoted by the letter K, or sometimes by the initialism SO. A "strikeout looking"—in which the batter does not swing and the third strike is called by the umpire—may be denoted by an inverted K (i.e. ꓘ ).
Curve Ball: Baseball, Statistics, and the Role of Chance in the Game. New York: Copernicus Books, 2001. ISBN 0-387-98816-5. A book on new statistics for baseball. MLB Record Book by: MLB.com; Alan Schwarz, The Numbers Game: Baseball's Lifelong Fascination with Statistics (New York: St. Martin's, 2005). ISBN 0-312-32223-2.
In Major League Baseball (MLB), .300 is considered an average BABIP. [2] Various factors can impact BABIP, such as a player's home ballpark; [3] for batters, being speedy enough to reach base on infield hits; [3] or, for pitchers, the quality of their team's defense. [4]
CS means the runner was caught trying to steal the base ahead. The notation for a runner caught trying to steal second is normally 2–4 or 2–6 for a catcher-to-second-base play. PK means the runner was picked off by the pitcher while he was off the base. [4] This almost always occurs at first base, so the notation is usually 1–3.
The stat was invented in 1979 by writer Daniel Okrent, [1] who called the metric "innings pitched ratio" at the time. Okrent excluded hit batsmen from the numerator of baserunners allowed since Sunday newspapers did not include hit batsmen in their agate box scores. [2] WHIP is one of the few sabermetric statistics to enter mainstream baseball ...
In baseball statistics, earned run average (ERA) is the average of earned runs allowed by a pitcher per nine innings pitched (i.e. the traditional length of a game). It is determined by dividing the number of earned runs allowed by the number of innings pitched and multiplying by nine. Thus, a lower ERA is better.
A baseball box score includes so much more than just runs, hits, and errors charged to teams. Teams' lineups are shared through box score, as well as an array of other statistics: Hits, at-bats, runs, RBIs (runs batted in), strikeouts, walks, batting average, pitching stats (e.g., innings pitched, earned runs, strikeouts).