Dynasty analytics for Sleeper
Sync. Analyze. Dominate.
Enter your Sleeper username and Gridiron LM pulls in every league you've ever played — then turns it into the analytics, rankings, and trade verdicts that win championships.
157,564
real dynasty trades priced
10,000
seasons simulated per league
11
tools, one login
$0
free, every feature
Know if you're actually winning
Every other dynasty tool can tell you what a player is worth. None of them know your starting lineup, your schedule, or your rivals — so none of them can tell you whether a trade actually wins you the league.
Our own value engine
Not a reseller of someone else's numbers. Values are built here from NFL production, dynasty age curves and draft capital, then calibrated against 150,000+ real dynasty trades — and they know your league's format, so Superflex and TE-premium aren't an afterthought.
Trade Analyzer
Instant A–F grades on any 2- or 3-team trade, with real rosters loaded from your leagues — and a shareable verdict graphic to end the group-chat argument.
Championship Odds
NewTen thousand simulated seasons over your league's real schedule, rosters and playoff settings — so you know whether you're actually a contender or just 6-2. Then price any trade in the only currency that matters: what it does to your title odds.
Support the site
Every tool here is free because a great dynasty decision should not sit behind a paywall. If Gridiron LM has helped you find a better deal, value your roster, or see a title window more clearly, a coffee keeps the daily data, models, and servers behind it running.
And everything else
Common questions
How are the dynasty trade values calculated?
Gridiron LM runs its own value model rather than reselling someone else's numbers. It starts from fundamentals — per-game production from nflverse play-by-play data, position-specific dynasty age curves, and draft capital — then blends in a market layer solved from 150,000+ completed dynasty trades pulled from public Sleeper leagues going back to 2019. The more a player actually gets traded, the more the market signal outweighs the model.
Do I need an account to use it?
No. Enter your public Sleeper username and every league you've played in loads straight away. It's read-only and never asks for your Sleeper password. An email account is only needed for billing.
Does it support Superflex, TE Premium, and non-PPR leagues?
Yes, and it detects the format from each league's own settings rather than making you pick. Fantasy points are recomputed from raw stat components for your exact scoring, so Superflex quarterback values and TE-Premium tight end values come out of the model itself instead of being approximated with a multiplier.
How often do values update?
Player values refresh at least twice a day, the trade market is re-solved weekly as new trades come in, and a daily snapshot records every player's value so you can see 30-day risers and fallers.
Is Gridiron LM free?
Yes — every feature is free, with no trial and no card. Sync your Sleeper username and everything unlocks.
Is this affiliated with Sleeper?
No. Gridiron LM is an independent tool built on Sleeper's public API and open NFL data. It isn't affiliated with or endorsed by Sleeper, the NFL, or any team.
Read-only. No password needed — just your public Sleeper username.
Every feature is free. No account required to use the tools — just your Sleeper username.