RESEARCH: ERA/xERA outliers

Here at BaseballHQ.com, we like to embrace precision. At the same time, we understand the nature of any imprecision. A recent look at xERA, though, revealed some oddities. As part of the formulation process, we use a factor to adjust xERA such that league-wide, ERA and xERA agree. This makes sense, as there are likely factors beyond those in the xERA calculation that influence ERA.

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