Adjusted Pitching Runs (APR) translates a pitcher’s earned run prevention into an easy to compare run value, scaled to league context and innings workload.
Positive numbers reward pitchers who outperform the league, while negative figures highlight struggles.
By converting ERA differences into runs, APR condenses a season’s worth of innings into a single, intuitive metric that can be stacked next to WAR, ERA+, or WHIP when evaluating performance and value.
This metric complements other advanced statistics, such as FIP, which considers factors like strikeouts, walks, and home runs allowed, to provide a more detailed picture of a pitcher’s performance.
The APR can also be cross-referenced with the FIP calculation methodology to understand discrepancies between earned run averages and underlying performance indicators.
By integrating various metrics, analysts can gain a comprehensive insight into a pitcher’s effectiveness and potential impact on their team’s success.
Adjusted Pitching Runs Calculator
Adjusted Pitching Runs FAQ
What is Adjusted Pitching Runs?
Adjusted Pitching Runs converts the difference between a pitcher’s ERA and the league’s ERA into a run value, scaled by innings pitched.
Positive numbers indicate runs saved; negative numbers show extra runs allowed.
This metric provides insights into a pitcher’s overall effectiveness relative to their peers, allowing for a comprehensive evaluation of their contributions to the team’s success.
Furthermore, adjusted pitching wins explained highlight how these run values correlate to a pitcher’s ability to secure victories for their team, factoring in both defensive support and performance under various game situations.
By combining ERA with other advanced metrics, teams can better assess the impact of their pitchers throughout the season.
How is APR different from ERA?
ERA shows earned runs allowed per nine innings, while APR turns that gap against league average into an overall run contribution, making it easier to compare pitchers with different workloads.
Why divide innings by 9 in the formula?
Dividing by 9 converts innings pitched into full game equivalents, matching the per-nine basis that ERA is calculated on and ensuring an apples to apples conversion to runs.
Does APR account for park factors?
By itself, APR does not adjust for ballpark effects.
Analysts often pair it with park-adjusted ERA+ or incorporate park factors directly into the league ERA input for a more precise figure.
What is a good APR value?
As a rule of thumb, +10 or more suggests an above-average season, +20 pushes into All-Star range, and +30 or higher signals Cy Young caliber dominance.
Negative numbers reflect below-average performance.