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. ... "xERA represents the expected ERA of the pitcher based on a
normal ... As such, we can use hard-hit ball data to calculate an expected skills-
based ...

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/2010/02/fantistics_blog_2202010_expected_era_xera.html

Feb 20, 2010 ... 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 ... Overall,
based on the MLB pitcher population, XERA and ERA are very ...

www.myamortizationchart.com/sports-calculators/earned-run-average/

In baseball, earned run average (ERA) is the average number of runs a pitcher
allows per nine innings. This stats is used as a measure of a pitcher's expected ...

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.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,
...

sports.yahoo.com/mlb/blog/big_league_stew/post/Everything-you-always-wanted-to-know-about-FIP?urn=mlb,206286

Dec 2, 2009 ... How they calculate FIP: Tango's simplest version is expressed by the ... There is
also a stat called xFIP (aka expected FIP) that utilizes many more ... What FIP is
good for: FIP is a stat that's supposed to look like ERA, but it sure isn't ERA. ...
Ultimately, baseball is about runs, runs scored and runs pre...