Your Yahoo league, upgraded.
Sync your league once and the whole toolkit lights up: mock drafts against your actual leaguemates, a trade machine that grades every deal before you send it, and the record book your group chat has been arguing about for years. Free, no money, just receipts.
Summer 2026: Yahoo is changing developer API access. Existing league history keeps working; new league syncing resumes when our application is approved.
Draft against your league, not a random lobby
Every seat at the table is a persona built from what your leaguemates actually did in 8 real drafts. Dave reaches on quarterbacks here too. Your keepers are pre-applied, traded picks are honored, and the snake runs on your league's own settings and roster slots.
Run it as many times as you want. Every mock ends with a graded recap, a letter grade, your best steal, your worst reach, and one tap to post it to league chat so everybody sees what you did.
Run a mock draftSettle the trade before you send it
Two data planes, seven layers, and 5,000 paired season simulations behind every verdict. It prices the deal in your league's exact scoring and roster rules, reads whether your leaguemate will actually say yes, and tells you when the waiver wire makes the whole trade pointless.
It calibrates itself against your league's settled seasons: 0% median scoring error across 3,401 real player-weeks. Every number traces back to the season that produced it.
Read the whitepaperYour league's history, finally in one place
8 seasons sync in minutes and land as a living record book: champions and last places, all-time head-to-heads, keeper drama, and a draft report card for every manager, every year. The stuff your league argues about, with the receipts attached.
Sync your leagueEverything else that lights up
One sync, every tool. Each one scores in your league's own settings, not a generic average. No spreadsheets, no second site, no premium tier.
What-If Machine
Replay the season that wasn't. Undo a trade or reset a lineup and watch the standings move.
Keeper Advisor
See which keepers beat their round cost before the deadline, priced against your league's own board.
The Almanac
Every season written up: luck, regret, all-play records, and the weeks that decided it.
The Gazette
A weekly recap and preview for your league, written from real results and posted to the chat.
The Wire
Waiver receipts. Every add, drop, and FAAB bid your league has made, graded after the fact.
The Charter
Your league constitution, with an amendment history so nobody can rewrite a rule quietly.
Commish tools
One invite link, member management, and keeper settings. Running the league should take a tap.
The stuff people actually ask
Q.01 What is Offseason?
Free tools for your Yahoo fantasy league. And when the season ends, the Offseason begins. Sync once and you get mock drafts against your actual leaguemates, a trade machine that grades any deal, and your league's whole record book.
Q.02 Is this gambling?
No. There is no money anywhere in Offseason: nothing to deposit, nothing to wager, nothing to win except standings and receipts. The currency is bragging rights.
Q.03 What do the tools need to work?
A Yahoo fantasy league, connected read-only. Offseason reads your league's history and settings and never writes anything back to Yahoo. Your leaguemates join from one invite link, no Yahoo account of their own required.
Q.04 What does it cost?
Nothing. Free to play, no premium tier, and every member of your league gets the whole toolkit.
Q.05 What's coming next?
The Offseason itself. Later this season, year-round competitions your league picks, one set of standings, receipts all year. Here's the teaser.
Draft season is coming.
Come armed.
Connect your Yahoo league in a couple of minutes, share one invite link, and the whole toolkit lights up for everybody in it.
Bring your league