How it works
Bring the book.
Draft with a plan.
Three steps from your entries to a data-backed read on your whole book — tracked live through the season, with a plan to win the big one.
Score my book
Upload your draft export — that's the whole setup. No manual entry, no re-typing a single roster. Every team you drafted is in the system in seconds.
RECOMMENDED
The extension
Install the browser extension and it pulls Underdog + DraftKings in one file. Sign in, your teams load automatically, click Export — done.
FALLBACK
Underdog CSV
No install? Export the CSV Underdog emails you from the app — Profile → Drafts → Export — and drop it in. Underdog only.
Your book stays private. We never share it, and you don't need to create an account to get scored.
Thousands of simulated seasons, run on your real rosters through the same engine that studied five years of Best Ball Mania — handed back as one clear report. It opens on your odds and three diagnostic scores, then breaks down the metrics behind each one.
The Overall report · your odds, your three scores, and your read — on a real 117-team book
Build Score
How every roster was built — capital, structure, and stacks vs the winning shape.
Exposure Score
How your whole book is spread — bet-sizing, finals reach, and independent shots.
Upside Score
The ceiling you drafted — how high your teams score and how cheaply you bought it.
A grade tells you where you stand. Milly Metrics tells you what to do next — a personalized plan that turns the numbers into your next draft's shopping list.
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Teams to target
The top offenses you're under-exposed to, ranked by how much they'd lift your book.
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Exposures to fade
Where you're over-concentrated — the players costing you independent title shots.
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Upside to add
Under-owned, high-ceiling players who raise your book without crowding what you hold.
Your turn
Stop guessing. Prove it.