Last updated 8 August 2026
DELTA is a free dynasty fantasy football analytics tool built and run by one person. Using the site means you accept the terms below.
DELTA scores players on what they have demonstrated — production, age, opportunity, and contract — and shows where its model disagrees with market prices. It is a research tool for thinking about dynasty rosters. It is not a prediction service, and it does not claim to know what will happen.
Every number on DELTA is an estimate produced by a model. Models are wrong regularly, and this one is no exception. Roster decisions you make are yours alone, and DELTA is not responsible for how they turn out. Nothing here is financial advice, betting advice, or a recommendation to wager money on anything.
DELTA is free to use, with or without an account. You agree to use it for personal, non-commercial purposes and not to:
An account is optional and exists only to sync your settings and watchlist across devices. You are responsible for the email address you sign in with and for keeping access to it secure, since anyone with access to that inbox can sign in as you. You can stop using an account at any time, and you can ask for it to be deleted.
Accounts that are used to abuse the site or other users may be suspended or removed.
DELTA is offered as-is. It is a personal project maintained around a full-time job, which means there is no guaranteed uptime, no support commitment, and no promise that features will keep working, stay free, or continue to exist. Data updates depend on outside sources that can change or disappear without notice. The site may be taken offline at any time.
Statistics, contracts, injury status, roster spots, and market values come from third-party sources and from a pipeline that runs on a schedule. Information can be stale, incomplete, or wrong, especially during free agency, the trade deadline, and the days around the NFL draft. Verify anything that matters before acting on it.
DELTA is an independent project. It is not affiliated with, endorsed by, or sponsored by the National Football League, the NFL Players Association, any NFL club, any college athletic conference or institution, Sleeper, FantasyCalc, or any other data provider. All team names, player names, and trademarks belong to their respective owners and are used for identification only.
The DELTA name, logo, site design, model methodology, and code belong to their author. Underlying statistics are facts and belong to no one, but the way DELTA organises, scores, and presents them does not become yours by viewing it. You are welcome to reference DELTA's outputs in league chats, articles, and podcasts with attribution; you may not repackage them as a competing product.
To the fullest extent the law allows, DELTA and its author are not liable for any loss arising from your use of the site, including lost trades, lost leagues, lost league fees, lost data, or downtime. DELTA is provided without warranties of any kind, express or implied, including any implied warranty of merchantability, fitness for a particular purpose, or non-infringement.
You must be at least 13 years old to create an account.
These terms may change as DELTA does. The date at the top will change when they do, and continuing to use the site after that means you accept the updated terms.
These terms are governed by the laws of the State of Arizona, United States, without regard to its conflict-of-law rules.
Questions about these terms: steve@fantasydelta.com