NUT Score measures how much production a player adds to their team, similar to WAR. The key difference: NUT excludes defense entirely. WAR includes defensive metrics like DRS and UZR that can swing wildly from year to year, making single-season WAR unreliable. NUT strips that out and focuses on what’s stable and measurable.

For hitters, NUT starts with wOBA — the most accurate single measure of offensive production. It converts wOBA to runs above average, then translates those runs into a single production number using a league-specific runs-per-win constant. For pitchers, NUT uses FIP instead of ERA, isolating strikeouts, walks, and home runs — the outcomes a pitcher controls.

Six letter-graded tiers make it instantly readable: S — Nutty (+5.0+ for a hitter) is MVP-caliber, A — Star (+3.0) is elite, B — Solid (+1.0) is a quality contributor, C — Average (around 0.0) is right at league average, D — Below Avg is moderately below, and F — Bench is deeply below. Pitchers use tighter cutoffs (Nutty at +2.5). Season NUT accumulates game by game, so the top tiers are earned over a full season.

NUT was created because WAR has a transparency problem. Different providers (FanGraphs vs Baseball Reference) calculate WAR differently and often disagree by 1–2 wins on the same player. NUT uses one formula, one set of inputs, and gives you one clear answer.

What is a good NUT?

NUT Score IS the metric. It measures a player’s production using wOBA for hitters and FIP for pitchers, excluding defense entirely for a cleaner, more stable measure than WAR.

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