Week 4
Your league, ranked by each team’s best possible lineup.
Who to start this week, and why.
Status changes that passed a two-source check, newest first.
Verified news
Run and pass defense
Yards allowed per game, with rank| Team | Rush yds | Pass yds | Faces in Week |
|---|
Build both sides of a deal. The grades update as you go.
Side A gives up
vs
Side B gives up
Market appraisal
Add players to both sides
The appraisal updates as you build the trade.
Where you’re deep, where you’re thin, and trades that fix both.
Status, role, matchup and value for any player.
Everyone available in your league, best moves first.
The value model behind every ranking, appraisal and recommendation.
Biggest movers this week
| Pos | Why |
|---|
| Player | Pos | Team | Bye | Tier | Value |
|---|
League & team
These identify which team on the roster list is yours, and what week you are planning for.
Connect your league
Pick your platform.
No login needed — just your username.
Or build rosters by hand
Works for any platform — assign players from the market board to teams directly.
Scoring format
Set automatically when you sync ESPN or Sleeper. Projections adjust for what a catch is worth.
Injury statuses
Auto-flags Questionable/Doubtful/Out/IR from ESPN. Never overwrites a status you set by hand.
Matchup ratings
2025 results blended with 2026 games as they’re played. Runs when the page opens.
Player values
Expert ranks, preseason ADP, 2025 and 2026 stats, blended weekly. New weeks come in from Sleeper when the page opens.
Schedule data (diagnostics)
Who plays whom each week. If My Team shows no opponents, check here.
Move to a new address
Your data lives in this browser — it doesn't follow you to a new domain automatically. Export here, import there.
Data
Everything above is stored only for you. Clear it if you want to start over.
What happens when you connect ESPN, in plain English. You can check every claim in the page source.
The data flow
What moves whereYour
Browser
→
Browser
ESPN
(you're already logged in)
→
(you're already logged in)
League data
(rosters, teams, settings)
→
(rosters, teams, settings)
Gridiron
(your browser only)
(your browser only)
Never transmitted to Gridiron
✗ Your ESPN password
✗ Your ESPN session cookie (
✗ Anything that could make a lineup change
✗ Anything that could submit a waiver claim or trade
✗ Your ESPN session cookie (
espn_s2, SWID)✗ Anything that could make a lineup change
✗ Anything that could submit a waiver claim or trade
All that's ever imported
✓ Team rosters
✓ Team and manager names
✓ League scoring settings
✓ Weekly matchups and records
✓ Nothing beyond what those four views return
✓ Team and manager names
✓ League scoring settings
✓ Weekly matchups and records
✓ Nothing beyond what those four views return
Why "read-only" isn't just a promise here
Every request this app makes to ESPN is a plain GET — the kind of request that only ever asks for data, and cannot change anything on ESPN's side. There is no code anywhere in this app that constructs a POST, PUT, DELETE, or PATCH request to ESPN — not hidden, not for a future feature, not anywhere. That's not a policy Gridiron is promising to follow; it's the only kind of request the code is capable of making. If you're comfortable reading JavaScript, the entire app is one HTML file — view source in your browser and you can check every claim on this page yourself, including the bookmarklet's exact code below.
Exactly which ESPN addresses are contacted
site.api.espn.com — public roster, injury, and schedule data (no login needed, no cookies sent)
lm-api-reads.fantasy.espn.com — your private league's roster/team/settings data (uses your existing ESPN login)
lm-api-reads.fantasy.espn.com — your private league's roster/team/settings data (uses your existing ESPN login)
If a direct request for ESPN's public data (or the weather) is blocked, the same public request is retried through a public relay: api.allorigins.win, api.codetabs.com or corsproxy.io. A relay sees only the web address, never your login or cookies. Automatic import of a public league can use one too; the bookmarklet and extension never do.
No tracking, because there's nothing to track with
This app has no backend server and no analytics of any kind — not on the ESPN connection, not anywhere. Your synced league, the statuses you set and your settings live in your own browser's local storage, on your device, and nowhere else. Nothing is sent to Gridiron's developer, because there is no server for it to be sent to. Clearing your data (League Setup → Data → Clear all saved data) deletes it completely and immediately — there's no copy anywhere else to delete.
The bookmarklet's actual source code
So you don't have to trust the description of itThe exact code the ESPN bookmarklet runs.
The extension and the assistant
On desktop Chrome, the Gridiron Connector extension does the bookmarklet's job in one click. It uses the narrowest permissions Chrome offers: it can only touch the tab you click it on, only when you click it, and it makes one GET request to ESPN. It has no code that could change a lineup, claim a player, or propose a trade. Ask Gridiron sends your question and your roster to Claude on your own Claude account, only when you press Ask. The one shared database here holds public player news that has been cross-checked before it's published, never your league, roster, or anything about you.
Answers about your lineup, injuries, pickups and rivals, from your roster and verified news.
Ask Gridiron
To ask anything else, open Gridiron inside Claude. It's free with a Claude account.
Open in Claude