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NFL Fantasy · 2026 Season

NFL Fantasy.
Math-Driven. Free.

Projections derived from live betting markets. Auto-draft engine with six strategy personalities. Win-probability glasses on every decision. The full POSEIDON probabilistic stack — applied to America's #1 fantasy sport.

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Never Played Fantasy? Learn In 15 Minutes With Real Data.

An interactive walkthrough using real 2024 + 2025 NFL data. Draft a team, watch the season play week-by-week, pause at every decision, see exactly what would have happened if you'd done something different. Shareable. No signup. Built for genuine first-timers.

Real 2024 + 2025 outcomes Every decision explained What-if alternate timelines Shareable replay link
Start the Walkthrough → Glossary →
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Open The Auto-Draft Engine

Mock draft against 11 AI opponents using realistic ADP behaviors. Lock any picks; engine optimizes the rest. Six strategy personalities. Live cost-of-override panel on every choice.

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The Tools

P

Player Database

Every tracked NFL player. Distribution plots, schedule heatmaps, injury status, recent news.

R

Tier Rankings

Tier-clustered by projection. Filter by position, format, week. Custom scoring supported.

D

Auto-Draft Engine

Six strategy personalities. Lock + recalc. Mock against AI opponents. Live cost-of-override.

T

Trade Analyzer

Predicts whether the OTHER manager will accept. Shows playoff probability impact for both sides.

L

Lineup Optimizer

Boom/Bust mode that adapts based on whether you're a favorite or underdog this week.

W

Waiver Wire Bot

Tells you who to pick up and who to drop, with confidence scores. Weekly priority queue.

B

Bye-Week Scarcity

Live stack-risk meter. Warns you when drafting too many players on the same bye week.

Live Projections Preview

Top 10 Rbs · Week 1 Projection

Median · 10th–90th percentile · 14-team Half-PPR

# Player Team Bye Floor Median Ceiling Bust % Boom %
1Bijan RobinsonATL1112.419.828.68%24%
2Saquon BarkleyPHI911.819.228.19%23%
3Jahmyr GibbsDET511.218.727.910%22%
4Christian McCaffreySF1410.318.127.212%21%
5De'Von AchaneMIA129.817.428.014%24%
6Derrick HenryBAL1410.517.125.411%19%
7Josh JacobsGB59.416.724.813%18%
8Kyren WilliamsLAR68.916.224.114%17%
9Joe MixonHOU148.415.823.715%17%
10Bucky IrvingTB118.115.423.917%19%
Numbers update every 6h from live market data · See full rankings →

Honest by Default

Validated accuracy record — coming with the model

Projections update every 6h from the live market. A published, walk-forward accuracy record lands when the fantasy model is validated — until then we won't claim a hit rate we haven't earned.

What Only POSEIDON Does

Protection · Six Systems

Anti-Mistake Engineering

Every other site gives you tools and lets you make the same mistakes. POSEIDON actively prevents the 13 most common errors. Six dedicated systems watch what you're doing.

  • Tilt DetectorActive
  • Insurance DetectorActive
  • Recency Bias AlarmActive
  • Stale Ranking DetectorActive
  • Bye Week Pre-WarnerActive
  • Rule AuditActive
Decision Support · Live

Win Probability Glasses

Every roster decision shows real-time probability impact in three views: this week's matchup, season-long playoff odds, and championship path. Monte Carlo backed.

  • Start/Sit ProbabilityPer decision
  • Trade ImpactBoth sides
  • Trade AcceptancePredicted
  • Waiver ConfidencePer pickup
  • Season ProjectionMonte Carlo
  • Championship PathLive