Therefore, to determine which player is the most skilled, we need to find statistics that better isolate a pitcher's performance. One such stat is Skills-Interactive Earned Run Average (SIERA).

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 ...