Real-time intelligence for fantasy drafters

Draft
Brain.

Chrome extensions that give serious fantasy players real-time data, duplicate detection, and portfolio intelligence — right at the draft board.

⚡ See our products How it works

PGA available now  ·  NFL & NBA coming soon

Draft Brain PGA overlay active during a live Underdog Fantasy draft
3
sports covered at launch
8
simultaneous team warnings
1.5s
live rescan interval
0
bytes sent externally
Products

One brand.
Every sport.

Draft Brain builds sport-specific overlays tuned to the unique structure of each fantasy format. Start with PGA — NFL and NBA are on the way.

● Live
⛳ PGA Golf
Draft Brain
PGA

Built for 6-player Underdog Fantasy PGA drafts. Detect duplicate lineups, track exposure percentages, and find pairing patterns — all in real time.

  • Duplicate lineup detection
  • Player exposure % tracking
  • First-pick pairing counts
  • Color-coded team warnings
  • One-click team scraping
Get PGA Overlay →
Coming soon
🏈 NFL
Draft Brain
NFL

Duplicate detection and portfolio intelligence built around NFL roster construction — QB stacks, positional exposure, and game-theory-aware warnings.

  • QB stack duplicate detection
  • Positional exposure tracking
  • Ownership projections
  • Salary-aware pairing data
  • Multi-entry portfolio view
Notify me
Coming soon
🏀 NBA
Draft Brain
NBA

NBA-specific lineup intelligence covering game stacks, pace-of-play exposure, and duplicate detection tuned to the unique structure of basketball slates.

  • Game stack duplicate warnings
  • Pace & matchup exposure
  • Minutes risk tracking
  • Correlation-aware pairings
  • Multi-slate portfolio view
Notify me
Get notified

Be first when NFL & NBA launch

Drop your email and we'll notify you the moment a new sport goes live.

PGA Overlay — Features

Every edge you need
at the draft board

Draft Brain PGA runs silently in the background and surfaces exactly what you need — before you make a pick you'll regret.

🎯
Duplicate detection
Warns you the moment your draft mirrors a saved lineup. Triggers after 2 matching picks, color-coded by saved team so you know exactly which lineup is at risk.
📊
Live exposure %
Every golfer in the list shows their portfolio exposure — calculated from your saved teams in real time. Know your book at a glance without leaving the draft.
🔗
Pairing intelligence
After your first pick, every remaining player shows a pairing count — how many of your saved lineups include them alongside your opening selection.
⚡
One-click data loading
Scrape your completed drafts directly from Underdog with one click, or upload your exposure CSV. Your lineup data is ready before the draft clock starts.
🎮
Draggable overlay
The floating panel lives on top of the draft screen — drag it anywhere, minimize it, or hide it instantly. No tab switching, no context loss, no disruption.
🔒
Fully private
All data is stored locally in your browser. Nothing is sent to external servers. Your lineups stay yours. Works entirely offline once teams are loaded.
Setup

Up and running
in 60 seconds

1
Install the extension
Download Draft Brain PGA and load it into Chrome. The 🧠 icon appears in your toolbar — pin it for easy access.
2
Enter your Underdog username
Type your handle in the popup. Draft Brain uses this to track only your picks — ignoring other drafters in the room entirely.
3
Load your saved teams
Navigate to your completed tournament page and hit Scrape — or upload your Underdog exposure CSV. Takes under 10 seconds.
4
Draft with confidence
Join any live PGA draft. The overlay activates automatically. Every player labeled, every duplicate flagged, every pairing counted — in real time.
Completed drafts page showing lineup data ready to scrape
Pick-by-pick intelligence

The right data
at every pick

Draft Brain knows what information matters at each stage of the draft — and shows you exactly that, nothing more.

Before pick 1
Exposure everywhere
Every player shows their portfolio exposure percentage from your saved lineups. Manage your book before you even start picking.
34.1%
After pick 1
Pairing counts appear
Each remaining player gets a count of how many saved lineups pair them with your first pick. Find your highest-leverage combinations.
7 pairings
After pick 2
Duplicate warnings active
Any saved team with 2+ matching picks triggers a color-coded warning. Danger players are flagged directly in the draft list.
⚠ 2/6 matched
Full match
Duplicate alert
If all 6 picks mirror a saved team, the overlay fires a full duplicate alert. You always know before it's too late to change course.
🚨 DUPLICATE
Badge system

Every player labeled.
Every risk flagged.

Draft Brain annotates the player list in real time. Here's what each badge means and when it appears.

R. McIlroy34.1%
Exposure %
Always visible when teams are loaded. The share of your saved lineups that include this golfer. Helps you manage portfolio balance without leaving the draft.
S. Scheffler58.3%7
Pairing count
Appears after pick 1 only. How many saved teams pair this player with your first pick. Higher numbers reveal your most common combinations.
C. Bezuidenhout24.4%⚠ 2/6
Danger warning
This pick would create a 2-player match with a saved team. The row highlights in that team's assigned color. Avoid to stay clear of a duplicate.
S. Straka31.2%⚠ 3/6
Deep danger
Half your roster already matches a saved team. Up to 8 at-risk teams tracked simultaneously, each in a distinct color matching the panel warning.
Pricing — PGA Overlay

Start free.
Upgrade when ready.

No credit card required to get started. Try Draft Brain PGA with up to 5 saved teams — completely free.

Free
$0
forever · no card needed
  • Up to 5 saved teams
  • Duplicate detection
  • Exposure % badges
  • Pairing count badges
  • Unlimited teams
  • Priority support
Install free →
Most Popular
Pro
$5
per month  ·  cancel anytime
  • Unlimited saved teams
  • Duplicate detection
  • Exposure % badges
  • Pairing count badges
  • Up to 150 teams per scrape
  • Priority support
Get Pro — $5/mo →

Payments secured by Stripe

Installation

Four steps to your
first draft edge

01
Download & unzip
Download draft-brain-pga.zip and unzip it to a permanent folder. Don't delete it after loading.
02
Load in Chrome
Open chrome://extensions, enable Developer mode, click Load unpacked, and select the folder.
03
Set your username
Click the 🧠 icon and enter your Underdog handle. This filters your picks from other drafters in the room.
04
Load your teams
Navigate to your completed tournament page and click Scrape — or upload your Underdog exposure CSV directly.
FAQ

Questions

What sports does Draft Brain support?
The PGA Golf overlay is available now for Underdog Fantasy. NFL and NBA overlays are in development — sign up above to be notified when they launch.
Does Draft Brain work on any PGA contest on Underdog?
Yes — it works on all 6-player PGA golf drafts on app.underdogfantasy.com. The overlay activates automatically when you enter any live PGA draft.
Can other players in the draft see I'm using it?
No. Draft Brain is a local Chrome extension — completely invisible to other users and to Underdog's servers. It only reads the page in your own browser.
What's the difference between scraping and uploading a CSV?
Scraping reads your teams directly from the Underdog completed drafts page — fast, no file handling, but always replaces existing data. CSV upload imports from Underdog's exposure export and merges with existing data, letting you combine multiple uploads.
How does the free tier limit work?
The free plan saves up to 5 teams. Scraping or uploading stops at 5 — enough to try the full feature set before upgrading to Pro for unlimited teams.
Is my lineup data private?
Completely. All team data is stored in Chrome's local storage on your own machine. Nothing is transmitted to any server. See our Privacy Policy for full details.
Will it break if Underdog updates their site?
Draft Brain reads player names by text content rather than CSS class names, making it resilient to most UI updates. If a major layout change breaks functionality, an updated extension will be released promptly.

Stop drafting
blind.

Every edge counts. Draft Brain gives you the intelligence you need — before the pick, not after.

⚡ Get Draft Brain Free