The Engine

How Frailty Scores Work

A patent-pending AI engine trained on five seasons of NFL injury data — turning 20 measurable features into a single durability score for every player, every week.

The Model

Built on Real Data,
Not Hot Takes

Frailty Scores are produced by the INJSUR patent-pending AI engine, built on a comprehensive dataset including player demographics, performance statistics, current physical performance metrics, detailed injury history, workload data and more. The probabilities are produced on both a weekly and season-long basis, so users can understand both short-term risks for upcoming games and long-term risks over the course of the season.

Patent-pending AI engine

Every score is produced by the INJSUR proprietary, patent-pending machine-learning engine — trained on five seasons of NFL notable-injury data and per-player workload stats — that turns raw NFL stats into a quantified 40–85 frailty score, not a hot take.

Comprehensive dataset

Inputs span player demographics, performance statistics, current physical performance metrics, detailed injury history and workload data — the full picture of durability that no single fantasy platform or sportsbook publishes.

Weekly probabilities

Short-term durability scoring for every upcoming game — so users can evaluate the risk of every player in a DFS lineup, prop or SGP before kickoff and before the line moves.

Season-long probabilities

Forward-looking durability scoring across all 17 weeks — for dynasty drafts, trade windows, futures and bankroll strategy, where long-term injury exposure is the variable nobody else publishes.

On Your Platforms

Works Alongside Every Tool
You Already Use

DFS

DraftKings / FanDuel

Sort by PPR projection. Downgrade anyone frailty > 70 in cash lineups. Flip it for tournaments where you want differentiated, high-variance plays.

Props

Sportsbook Player Props

Use frailty as the tiebreaker between two similarly priced props. Lean unders on high-frailty skill players. Lean overs on low-frailty workhorses.

Fantasy

ESPN / Yahoo / Sleeper

Use the league leader board to find sell-high candidates (top-10 producer plus top-10 frailty) and buy-low targets (mid-tier producer plus bottom-quartile frailty).

Bankroll

Risk Management

One rule: cap weekly exposure to any player with frailty ≥ 80. The simplest single cut that meaningfully reduces tail risk across an entire season.