Defense-Independent Component ERA
Encyclopedia
Abbreviated 'DICE', Defense-Independent Component ERA is a recent (21st century) variation on Component ERA
, one of an increasing number of baseball
sabermetrics
that fall under the umbrella of defense independent pitching statistics
. DICE http://www.sportsmogul.com/content/dice.htm was created by Clay Dreslough
in 2001.
The formula for Defense-Independent Component ERA (DICE) is:
In that equation, "HR" is home runs, "BB" is walks, "HBP" is hit batters, "K" is strikeouts, and "IP" is innings pitched. That equation gives a number that is better at predicting a pitcher's ERA in the following year than the pitcher's actual ERA in the current year.
Component ERA was created by Bill James
to create a more accurate way of evaluating pitchers than earned run average
(ERA). Whereas ERA is significantly affected by luck (such as whether the component hits are allowed consecutively), Component ERA eliminates this factor and assigns a weight to each of the recorded 'components' of a pitchers performance. For CERA, these are singles
, doubles
, triples
, home run
s, walks
and hit batters
.
Defense-Independent Component ERA (aka 'DICE') is an improvement on CERA that removes the contribution of the pitcher's defense, instead estimate a pitcher's ERA from the components of his pitching record that don't involve defense. These are home runs, walks, hit batters and strikeout
s.
Component ERA
Component ERA or ERC is a baseball statistic invented by Bill James. It attempts to forecast a pitcher's earned run average from the number of hits and walks allowed rather than the standard formula of average number of earned runs per nine innings...
, one of an increasing number of baseball
Baseball
Baseball is a bat-and-ball sport played between two teams of nine players each. The aim is to score runs by hitting a thrown ball with a bat and touching a series of four bases arranged at the corners of a ninety-foot diamond...
sabermetrics
Sabermetrics
Sabermetrics is the specialized analysis of baseball through objective, empirical evidence, specifically baseball statistics that measure in-game activity. The term is derived from the acronym SABR, which stands for the Society for American Baseball Research...
that fall under the umbrella of defense independent pitching statistics
Defense independent pitching statistics
In baseball, defense-independent pitching statistics measure a pitcher's effectiveness based only on plays that do not involve fielders: home runs allowed, strikeouts, hit batters, walks, and, more recently, fly ball percentage, ground ball percentage, and line drive percentage...
. DICE http://www.sportsmogul.com/content/dice.htm was created by Clay Dreslough
Clay Dreslough
Clay Dreslough is the creator of the Baseball Mogul and Football Mogul computer sports games, and is the co-founder and President of Sports Mogul, Inc...
in 2001.
The formula for Defense-Independent Component ERA (DICE) is:
In that equation, "HR" is home runs, "BB" is walks, "HBP" is hit batters, "K" is strikeouts, and "IP" is innings pitched. That equation gives a number that is better at predicting a pitcher's ERA in the following year than the pitcher's actual ERA in the current year.
Component ERA was created by Bill James
Bill James
George William “Bill” James is a 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...
to create a more accurate way of evaluating pitchers than earned run average
Earned run average
In baseball statistics, earned run average is the mean of earned runs given up by a pitcher per nine innings pitched. It is determined by dividing the number of earned runs allowed by the number of innings pitched and multiplying by nine...
(ERA). Whereas ERA is significantly affected by luck (such as whether the component hits are allowed consecutively), Component ERA eliminates this factor and assigns a weight to each of the recorded 'components' of a pitchers performance. For CERA, these are singles
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 and getting to first base before a fielder puts him out...
, doubles
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 or another runner being put out on a fielder's choice....
, triples
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 nor another runner being put out on a fielder's choice....
, home run
Home run
In baseball, a home run is scored when the ball is hit in such a way that the batter is able to reach home safely in one play without any errors being committed by the defensive team in the process...
s, walks
Base on balls
A base on balls is credited to a batter and against a pitcher in baseball statistics when a batter receives four pitches that the umpire calls balls. It is better known as a walk. The base on balls is defined in Section 2.00 of baseball's Official Rules, and further detail is given in 6.08...
and hit batters
Hit by pitch
In baseball, hit by pitch , or hit batsman , is a batter or his equipment being hit in some part of his body by a pitch from the pitcher.-Official rule:...
.
Defense-Independent Component ERA (aka 'DICE') is an improvement on CERA that removes the contribution of the pitcher's defense, instead estimate a pitcher's ERA from the components of his pitching record that don't involve defense. These are home runs, walks, hit batters and strikeout
Strikeout
In baseball or softball, a strikeout or strike-out occurs when a batter receives three strikes during his time at bat. A strikeout is a statistic recorded for both pitchers and batters....
s.