About PIV

PIV (Player Impact Value) measures a hitter's total offensive contribution by combining production quality (wOBA relative to the league average) with quantity (plate appearances): PIV = (wOBA − League Average wOBA) × PA. The best players sustain elite performance over many plate appearances, so PIV rewards both rate and durability.

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

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

How to read the PIV boards

This page is the entry point to two PIV boards: the 100 best careers and the 100 best single seasons. PIV compares a hitter's weighted on-base average with the league's in each season, multiplies the difference by the hitter's plate appearances 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.

PIV: Frequently Asked Questions

Who has the highest career PIV?
Babe Ruth, with 111,979 career PIV.
What is the highest single-season PIV?
Babe Ruth in 1921, at 10,137.
What is PIV in baseball?
PIV (Player Impact Value) is Baseball Data Hub's own offensive metric: (wOBA minus league-average wOBA) multiplied by plate appearances, computed season by season and summed.
How is PIV different from WAR?
WAR measures a player against a replacement-level player; PIV measures him against the average player of his own era.