The Components of ERA

Updated: March 14, 2012, 8:25 PM ET
By Tristan H. Cockcroft | ESPN.com

ERA, or Earned Run Average, is one of the most instantly recognizable, frequently cited measures of a pitcher's performance.

The problem: It's also one of the most misleading measures for forecasting future success … and forecasting future success is the name of our game.

Sure, ERA accounts for two of the most critical skills of a pitcher -- recording outs and preventing runs -- but many external factors impact those departments, often skewing the results. Even the Wikipedia ...

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