en.wikipedia.org/wiki/Earned_run_average

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. ... Pri...

www.homerunweb.com/era.html

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 ...

www.baseballhq.com/glossary-c-k

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 ...

www.fangraphs.com/library/pitching/xfip/

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.

www.insiderbaseball.com/blog/2007/02/expected_era_xera.html

Feb 28, 2007 ... Expected ERA (XERA) depicts a pitcher's "True ERA" as it bases its ... consider
the inequity with the ERA calculation, specifically related to errors and ... on the
MLB starting pitching universe, XERA and ERA usually are almost ...

www.lootmeister.com/mlb/era.php

How to Calculate ERA. By Loot, MLB Handicapper, Lootmeister.com. ERA is the
telltale stat of any pitcher. A pitcher with an ugly losing record can stay in the ...

sportsgambling.about.com/od/2014bases/fl/Expected-ERA-for-Baseball-Bettors.htm

A look at using Expected ERA for baseball betting purposes. ... The formula for
xERA is a bit complicated and does take a bit of work to calculate, but is best ...

www.beyondtheboxscore.com/2012/9/14/3332194/era-plus-vs-era-minus

Sep 14, 2012 ... I was pulling stats from both Baseball-Reference and FanGraphs, and ... For
more info on ERA-, and how it is calculated, check out Patriot's article that I ... that
ERA+ can be used, relatively easily, to calculate an expected W%.

www.baseballprospectus.com/glossary/index.php?search=SIERA

Skill-Interactive Earned Run Average estimates ERA through walk rate, ... This
was explained in more detail in the following series: part one, part two, part three,
...

www.baseballprospectus.com/glossary/index.php?search=FIP

The formula is (13*HR+3*BB-2*K)/IP, plus a constant (usually around 3.2) to put it
on the ... FIP is a component ERA inspired by the work of Voros McCracken on ...