Who has the highest career Pitcher PIV?

Roger Clemens, with 146,187 career Pitcher PIV.

What is the highest single-season Pitcher PIV?

Pedro Martinez in 1999, at 18,448.

Pitcher PIV is Baseball Data Hub's pitching metric: run prevention measured against the league average of the pitcher's own era, scaled by workload, using FIP as the underlying rate.

Does Pitcher PIV use ERA or FIP?

FIP (Fielding Independent Pitching), so the figure reflects what the pitcher controlled rather than the defense behind him.

Pitcher PIV Leaders: Career & Single-Season Records

As of October 24, 2026, the career leader in Pitcher PIV is Roger Clemens with 146,187. Cy Young is second with 141,398 and Greg Maddux third with 133,509. Pitcher PIV measures run prevention against the league average of the pitcher's own era, scaled by workload, using FIP as the underlying rate.

Data updated October 24, 2026

PIV is computed through the 2025 season, so it does not yet include 2026. Career totals elsewhere on the site include 2026 to date.

About Pitcher PIV

Pitcher PIV (Player Impact Value) measures a pitcher's total run-prevention impact, weighing performance against the league average (via FIP) by the workload they carried. Like its batting counterpart, it rewards both quality and durability, so a great arm with a heavy innings load rates ahead of a brief brilliant cameo.

Two leaderboards rank pitchers by PIV. Pick the one that matches what you're after:

Career Pitcher PIV Leaders

The 100 most impactful pitching careers of all time, ranked by total accumulated Pitcher PIV across every season a pitcher threw.

View career Pitcher PIV leaders →

Single-Season Pitcher PIV Records

The 100 most dominant individual pitching seasons ever, ranked by single-year Pitcher PIV — the best peak run-prevention campaigns in baseball history.

View single-season Pitcher PIV records →

New to the metric? Read the full PIV methodology for how each season is re-anchored so pitchers are judged against their own era.

How to read the Pitcher PIV boards

This page is the entry point to two Pitcher PIV boards: the 100 best careers and the 100 best single seasons. Pitcher PIV scores a pitcher's run prevention against the league of each season pitched, weighted by workload, and sums the seasons into a career figure.

Because the comparison is always to that season's league, a strong season in a low-scoring era and one in a high-scoring era can earn similar credit. A negative season is possible and is counted, so a long decline can lower a career total. The boards are computed from completed seasons, so a season still in progress is not included until it ends. The methodology page sets out the formula, the league baselines and the known limits of the measure.

Pitcher PIV: Frequently Asked Questions

Who has the highest career Pitcher PIV?: Roger Clemens, with 146,187 career Pitcher PIV.
What is the highest single-season Pitcher PIV?: Pedro Martinez in 1999, at 18,448.
What is Pitcher PIV?: Pitcher PIV is Baseball Data Hub's pitching metric: run prevention measured against the league average of the pitcher's own era, scaled by workload, using FIP as the underlying rate.
Does Pitcher PIV use ERA or FIP?: FIP (Fielding Independent Pitching), so the figure reflects what the pitcher controlled rather than the defense behind him.