RELIEVERS: pxERA and xERA as early filters

This week, the column looks at Expected ERA (xERA) and projected Expected ERA (pxERA) as indicators for success by relievers. xERA and pxERA have long been a staple at and have proven again and again to be successful in figuring out which skill sets are the best ones—even while newer, seemingly sexier metrics have come into vogue.

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  For more information about the terms used in this article, see our Glossary Primer.