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In baseball statistics, earned run average (ERA) is the mean of earned runs given up by a ... pitchers' defensive errors) are recorded as unearned runs and omitted from ERA calculations. ... Prior to 1900 – and, in fact, for many years afterward – pitchers were routinely expected to pitch a complete game, and their win-loss ...


Earned Run Average (ERA) is a baseball metric used put a pitcher's number of ... win/loss ratio (primarily because pitchers were expected to pitch a full game).


Examples of what constitues both good and bad earned run average for Major League Baseball pitchers. ... MLB Betting: How to Judge a Pitcher's ERA ... A closer might be expected to have a lower ERA, but for the most part, an ERA of 3.00 is ...


This sabermetric glossary is reprinted in its entirety from the 2008 Baseball Forecaster. ... A hitter's batting average as calculated by multiplying the percentage of balls put ... "xERA represents the expected ERA of the pitcher based on a normal ...


How to Calculate Earned Run Average (ERA) As the basic statistical measure ... So, for example, a pitcher with a 3.50 ERA is expected to allow three and a half ...


Expected Fielding Independent Pitching (xFIP) is a regressed version of Fielding ... It's calculated in the same way as FIP, except it replaces a pitcher's home run total with an estimate .... Better with Less: ERA Estimators – Baseball Prospectus.


Feb 20, 2015 ... There are two ways of calculating Pythagorean Winning Percentage (W%). ... The average difference between the actual and the Expected W-L is a bit ... its application is limited to a specific era of baseball, and the slope (the ...


The pitcher's expected runs allowed is then the sum of his opposition's run ... In the current MLB environment, relievers have much lower ERAs than starters.


Feb 2, 2012 ... Expected ERA is a term coined by 2 stat researchers (Gill and Reeve), who developed the following mathematical formula ((.575 * H/9 ) + (.94 ...


Sep 14, 2012 ... What's the difference between ERA+ and ERA-, and why does it matter? ... at Baseball-Reference, and ERA-, an advanced statistic that can be found at .... that ERA+ can be used, relatively easily, to calculate an expected W%.