What is VBD? Value Over Replacement, Explained
Data Dictionary · the currency career outcomes are measured in
VBD (Value-Based Drafting) measures a player's fantasy production as points above a positional replacement baseline, rather than raw points. A QB and an RB who score the same fantasy points are not equally valuable, because a replacement-level QB scores far more than a replacement-level RB. VBD is the standard correction for that — and it is the currency every career outcome on this platform is measured in.
Why raw points mislead
Quarterbacks dominate raw scoring; that doesn't make every QB valuable. What wins fantasy matchups is the edge over what you could have started instead — the freely available replacement at the same position. VBD formalizes this: take a player's points, subtract the baseline production of a replacement-level player at his position, and what's left is the value the roster spot actually generated. The framework was popularized in the fantasy community by Joe Bryant at Footballguys in the 1990s and remains the backbone of serious fantasy valuation.
How this platform uses VBD
VBD is the target variable the prospect model is judged against, in three forms:
- 5-year career VBD — points above replacement summed over years 1–5 after the draft. The primary outcome measure: a hard, identical window for every prospect.
- Peak 3-year VBD average — the best three-season average. Published as a counterweight, because the 5-year sum favors accumulators over short, brilliant peaks.
- Career tiers — Star / Starter / Contributor / Bust, derived from career VBD percentiles within position.
All twelve regressions of DMX against these targets are published with coefficients in the methodology whitepaper. The slopes give VBD a concrete meaning for rookie evaluation: at RB, for example, one full standard deviation of DMX has historically been worth about 52 points of 5-year VBD (slope 52.1, n = 701, classes 1998–2020) — roughly the gap between a depth piece and a usable starter.
The honest limits
No single window is neutral. The hard 5-year sum treats a player with three elite years and two injured ones differently from a steady mid-tier accumulator; the peak formulation flips that preference. Both are published so the choice of lens is yours rather than hidden in methodology. And replacement baselines shift with scoring settings — a TE-premium league moves the TE baseline — so VBD comparisons are most meaningful within a consistent scoring format.
Frequently asked questions
What does VBD stand for?
Value-Based Drafting - a valuation framework that measures fantasy points above a positional replacement baseline instead of raw points, so players at different positions can be compared on the value they add to a lineup.
Why use points above replacement instead of total points?
Because positions have different baselines: a replacement-level QB outscores a replacement-level RB by a wide margin. Subtracting the baseline isolates the edge a player actually gives you over what was freely available.
Why a 5-year window for career VBD?
It puts every prospect on an identical clock starting at the draft, long enough to capture a real career arc but fixed so no player is graded on a longer leash. A peak 3-year alternative is also published for players with concentrated primes.
Does VBD depend on league scoring settings?
Yes - baselines move with format (PPR, TE-premium, superflex all shift them). The platform's historical VBD is computed under one consistent convention so prospects are comparable across 25 years.