How dynasty values are built

FairPlay combines market context with open NFL production data, then converts the complete player pool into one consistent dynasty Superflex value curve.

Published league format

The calculator is calibrated for dynasty Superflex leagues using Half PPR scoring. Rankings may offer exploratory display adjustments, but the calculator does not claim separate redraft, keeper or live-injury models.

Data inputs

Production inputs reference 2020–2026 nflverse and nflfastR data: completed 2020–2025 performance plus the current 2026 roster snapshot. Market search rank, age, position, team status and model coverage provide additional context.

Model weighting

The current framework emphasizes market and expert consensus, NFL production, opportunity share, efficiency, age and career window, draft capital, position scarcity, and team environment. These inputs are normalized across the full player pool before values are mapped to the published curve. Market context anchors the model, while football evidence tests whether that price is supported rather than allowing one noisy statistic to control a ranking.

Age curves are position specific

FairPlay does not apply one universal age penalty. Running back values tend to become more workload-sensitive earlier, wide receivers generally retain a broader prime window, tight ends can develop later, and secure quarterbacks can remain liquid for much longer. Age changes the expected remaining window and downside risk; it does not automatically override current production or role security.

Why Superflex changes quarterback value

A 12-team Superflex league can start as many as 24 quarterbacks each week, while the NFL supplies only 32 starting jobs. That replacement pressure makes stable QB2 production materially harder to replace than it is in a one-quarterback league. The model therefore prices starting security, age and rushing or passing ceiling inside a Superflex-specific player pool rather than applying a cosmetic quarterback multiplier after the ranking is built. You can inspect that format in the dynasty Superflex trade calculator and compare the reasoning with the Superflex quarterback valuation guide.

Production and projection branches

Players with sufficient NFL evidence use the production branch. Rookies, prospects and players without adequate professional samples use a projection branch so missing statistics are not treated as poor performance. Rankings identify projection players where relevant.

Package adjustment

Trade value is not simple addition. Consolidating several lower-value assets into one elite player usually requires a premium because roster spots and scarce difference-makers have value of their own. FairPlay discounts secondary pieces progressively, allowing the result to show the difference between raw market value and usable package value. Deep starting lineups may justify a smaller discount; shallow leagues and elite quarterbacks often justify a larger one.

Future rookie-pick discounting

Picks are separated by year and broad early, middle and late ranges. A distant pick is discounted because it cannot score now, its final slot is uncertain and the prospect pool can change. It still retains liquidity because it cannot lose a depth-chart role while it remains a pick. The calculator treats that balance as a time-and-uncertainty adjustment rather than assuming every future first is equal.

Seven-day trends

When a complete seven-day snapshot exists, the trend is the difference between the current value and that saved snapshot. Until enough history exists, FairPlay clearly labels a market-rank-based estimate instead of presenting it as observed movement.

Limits of the model

No model can fully capture league rules, manager preferences, breaking injuries or future performance. FairPlay is a transparent starting point for negotiation, not an instruction to accept or reject a trade.

FairPlay currently publishes one trade-calculator format: dynasty Superflex with Half PPR scoring. Rankings controls are exploratory views and do not create separate fully calibrated models. Injury and news signals remain an observation layer until enough forward validation exists to show that an adjustment improves rather than merely reacts to headlines.

Availability observation validation

Injury and player-record signals are displayed separately and do not currently change rankings or trade values. A daily snapshot records flagged top-500 players, then compares their rank and value after seven days. This observation period must mature before FairPlay considers any calibrated availability adjustment.

Startup ADP collection

Startup ADP is calculated only from completed Sleeper Dynasty Superflex or 2QB drafts attached to a verifiable dynasty league. FairPlay displays the qualifying draft count, marks samples under three drafts as Limited, and marks missing samples as collecting. A 7D change compares cumulative configured samples only when a suitably dated baseline exists. ADP is a separate market observation and does not currently change the deterministic ranking model.

Model snapshot: September 26, 2026

Publishing and correction standards are documented in the FairPlay editorial policy. Source datasets are available from nflverse, and every model refresh records a dated snapshot rather than silently rewriting historical values.