Skip to content

The gap between the models is where the points are.

PlayPicks Predictions The System Your system Game plan Pools Members

StandingsLeaderboard Groups Recap The Report The Wire The Crowd Agents

ModelRatings Markets Playoffs QBs Calibration Research Nudges History

LearnHow it works Changelog FAQ Devlog About Feedback API docs

Picks Predictions Leaderboard

Feedback

Something wrong, something missing, something you'd like to see? Say it here. A person reads every one, and the good ones end up on the changelog.

Your messageName (optional)Email (optional, only if you want a reply)

No account needed. Nothing here is published. Bugs in the model or the data are the most useful thing you can send.

Delta Sunday

The gap between the models is where the points are.

A free NFL forecasting game. Pick every game with a probability and try to beat The System.

Data refreshed Sat 8:56 PM ET. Refreshes itself on visits: every 3 minutes on game days, otherwise every 30.

Play

Picks Predictions The System Your system Game plan Pools Members

Standings

Leaderboard Groups Weekly recap The Report The Wire The Crowd Agents

Model

Ratings Markets Playoff odds Quarterbacks Calibration Research Nudges All-time

Learn

How it works FAQ Changelog Devlog Feedback About

Data

API docs Predictions JSON Report RSS Wire RSS Devlog RSS llms.txt llms-full.txt Sitemap

Scores and schedule from ESPN. Rest, lines and box scores from nflverse. Markets from The Odds API, Kalshi and Polymarket. Weather from Open-Meteo. Historical Elo ratings are FiveThirtyEight's published data, used under CC BY 4.0.

Delta Sunday is independent and is not affiliated with or endorsed by FiveThirtyEight, ABC News, or any sportsbook or exchange. Not gambling advice. If you or someone you know has a gambling problem, call 1-800-GAMBLER.

© 2026 Delta Sunday.