The correlation between ERA and UERA was 0.36 — not overwhelming, but pretty strong. That means that pitchers who are good at preventing earned runs are also generally good at preventing unearned runs ...

ERA, or Earned Run Average for those of us out there who have too many acronyms and abbreviations to sort through in our everyday lives, has been around since the 1900s.

SIERA is an ERA estimator that holds pitchers accountable for the types of batted balls they allow; SIERA relies heavily on a pitcher's strikeout%2C walk and ground-ball rates ...

Tristan H. Cockcroft looks at the different factors that can affect earned run average, and why ERA is often not a great stat for projecting future performance.

The surprise Mountain West leader in earned run average did what he’s done all season on Friday, give Air Force baseball a chance. Seungmin Shim gave up three runs and eight baserunners across ...