What is VBD? Value Over Replacement, Explained
Data Dictionary · the currency career outcomes are measured in
VBD (Value-Based Drafting) measures a player's production as points above a replacement-level guy at his position, not raw points. A QB and an RB who put up the same fantasy points aren't worth the same, because a replacement-level QB scores way more than a replacement-level RB. VBD is the standard fix for that, and it's the currency I measure every career outcome in on this site.
Why raw points mislead
Quarterbacks pile up the raw points, but that doesn't make every QB valuable. What actually wins you matchups is the edge over what you could've started instead — the guy sitting free on the wire at the same position. That's all VBD does: take a player's points, subtract what a replacement-level guy at his spot would've given you, and what's left is what that roster spot really earned you. Joe Bryant over at Footballguys popularized it in the fantasy world back in the 1990s, and it's still the backbone of any serious valuation.
How this platform uses VBD
VBD is the thing I grade the prospect model against, in three flavors:
- 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 those targets, coefficients and all, are in the methodology whitepaper. And the slopes give VBD a real meaning for rookie picks: at RB, 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 difference between a depth piece and a guy you can actually start.
The honest limits
No window is perfectly neutral. The straight 5-year sum treats a guy with three elite years and two hurt ones differently than a steady mid-tier grinder; the peak version flips that. I publish both, so you pick the lens instead of me hiding it in the methodology. And replacement baselines move with your scoring — a TE-premium league bumps the TE baseline — so VBD comparisons mean the most inside one consistent format.
Frequently asked questions
What does VBD stand for?
Value-Based Drafting — a way of valuing players by their points above a replacement-level baseline at their position, instead of raw points, so you can compare guys at different positions on what they actually add to a lineup.
Why use points above replacement instead of total points?
Because positions start from different baselines — a replacement-level QB outscores a replacement-level RB by a mile. Subtracting the baseline leaves you with the edge a player actually gives you over what was free on the wire.
Why a 5-year window for career VBD?
It puts every prospect on the same clock from draft day — long enough to catch a real career arc, but fixed so nobody gets graded on a longer leash than the next guy. There's also a peak 3-year version for players whose value was bunched into a short prime.
Does VBD depend on league scoring settings?
Yes — baselines move with format (PPR, TE-premium, superflex all shift them). I compute the site's historical VBD under one consistent convention so prospects stay comparable across 25 years.