Does Draft Brain work on Underdog Fantasy?

Yes. Draft Brain works on app.underdogfantasy.com and activates automatically when you enter a live draft.

How much does Draft Brain NFL cost?

Draft Brain NFL is free for up to 20 saved teams, with unlimited drafts. Pro is $10 per month or $100 per year for unlimited saved teams.

How much does Draft Brain PGA cost?

Draft Brain PGA is free for up to 20 saved teams, with unlimited drafts. Pro is $5 per month or $50 per year for unlimited saved teams.

Draft Brain — Underdog Fantasy & DraftKings NFL Draft Assistant

Q: What sports does Draft Brain support?

Both the PGA Golf and NFL overlays are available now on the Chrome Web Store. The MLB overlay is coming soon.

Q: Does Draft Brain NFL work on DraftKings?

Yes. Draft Brain NFL works on both Underdog Fantasy and DraftKings Best Ball drafts. All features, including Post Draft Analysis, are supported on both platforms.

Q: Is my lineup data private?

Yes. All data stays on your own device — nothing is sent anywhere.

Products

Built for NFL.
Expanding to every sport.

Draft Brain builds sport-specific draft tools for Underdog Fantasy and DraftKings. The NFL overlay works on both Underdog and DraftKings. PGA and MLB are live on Underdog.

● Live

🏈 NFL

✓ Underdog Fantasy ✓ DraftKings

Draft Brain
NFL

The NFL draft assistant for Underdog Fantasy and DraftKings Best Ball. Real-time ownership %, QB stack detection, combo partner badges, and post-draft analysis, all in one overlay.

Split ownership pills (tourney% | overall%)
QB stack highlighting — up to 4 QBs, color-coded
Combo partner detection (4×+ threshold)
Portfolio analyzer & team builder
Post-draft ADP value breakdown
Playoff matchup badges (Weeks 15–17)

Install on Chrome →

● Live

⛳ PGA Golf

Draft Brain
PGA

The Underdog Open draft assistant for PGA golf. Built for 6-player Underdog Fantasy drafts. Detect duplicate lineups, track exposure percentages, and find pairing patterns with your Underdog draft strategy.

Duplicate lineup detection
Player exposure % tracking
First-pick pairing counts
Color-coded team warnings
One-click team scraping
Portfolio analyzer

Explore PGA →

● Live

⚾ MLB

Draft Brain
MLB

The MLB draft assistant for Underdog Fantasy. Duplicate detection with risk cards, plus team-stack, game-stack, and vs-pitcher correlation badges to build smarter baseball lineups.

Duplicate detection with risk cards
Team stack (TS) & game stack (GS) badges
vs-Pitcher warnings
Player exposure % tracking
Portfolio analyzer with Flex resolution

Explore MLB →

NFL Overlay — Features

Built for the snake draft
board, pick by pick

Draft Brain NFL is the Underdog Fantasy draft assistant for snake drafts, surfacing ownership, stack intelligence, and combo data the moment you need it.

🐶

Underdog Fantasy

All features supported

🏆

DraftKings Best Ball

All features supported

📊

Ownership % badges

Every player shows their ownership % across your saved teams, live during the draft. When you've filtered to a specific tournament, a split badge shows both your tournament ownership and your overall portfolio % side by side, so you can spot where you're over- or under-exposed at a glance.

🏈

QB stack (TS) detection

The moment you draft a QB, every teammate in the player list gets a color-coded TS badge and a tinted row so they're impossible to miss. Track up to four QB stacks at once, each in a distinct color, for the rest of the draft.

🔗

Combo partner badges

Players you frequently pair with your current picks get a combo badge showing how many of your saved teams include that combination. Spot your recurring build patterns and find your best combinations without leaving the draft.

📋

Portfolio analyzer

Open the Analyze Portfolio window for a full breakdown of your saved teams, NFL team exposure, your most common player pairings, how you tend to build your rosters, and which draft slots you've been drafting from. See full breakdown →

🏆

Post-draft analysis

After finishing a draft, the Post Draft window grades every pick against consensus ADP, shows your cumulative draft value on a live meter, maps your playoff-week matchups, and breaks down how your draft capital was spread across positions. See full breakdown →

⚡

CSV upload & auto-scrape

Load your teams in seconds, either by uploading your Underdog exposure CSV or by letting the extension scrape your completed drafts automatically. CSV upload gives you the most complete data for stack detection and portfolio analysis.

📅

Playoff matchup badges

Any player whose NFL team faces one of your drafted players' teams during the fantasy playoffs (Weeks 15–17) gets a badge showing the week and opponent. Week 17 championship badges appear in red so the highest-stakes matchups are impossible to miss, helping you build rosters that set up well for the whole playoff run.

In action

See it live on the draft board

Real screenshots from Draft Brain NFL running on Underdog Fantasy.

Draft Brain NFL Chrome extension popup panel showing Pro plan, tournament filter, and overlay toggle

Popup panel — Pro plan, tournament filter & overlay toggle

Draft Brain NFL split ownership pills showing tournament ownership percentage on the left and overall portfolio percentage on the right

Split ownership pills — tourney % left, overall % right

Draft Brain NFL live draft overlay on Underdog Fantasy showing real-time ownership percentage badges on every player

Playoff matchup badges — week 15/16 in yellow, week 17 championship in red

Draft Brain NFL QB stack detection — Josh Allen drafted, all Buffalo Bills teammates highlighted with TS badge

QB stack detection — BUF teammates highlighted with TS badge after drafting Josh Allen

Draft Brain NFL overlay running on an alternative Underdog Fantasy draft interface showing ownership badges, matchup tags, and playoff week indicators

Draft Brain NFL running on a live DraftKings Best Ball draft

Post Draft Analysis

Review every pick
after the draft ends

Click Post Draft Analysis in the popup right after finishing a draft. The window pulls in your full roster and grades the entire draft, yours and everyone else's at the table. Works on both Underdog Fantasy and DraftKings.

Draft Brain NFL Post Draft Analysis window showing team construction, pick-by-pick ADP grades, and draft capital allocation by position

Post Draft Analysis — starters, bench grades, and capital allocation

📋 Summary cards

Three cards at the top give you an instant read: your team construction (QB-RB-WR-TE counts), your cumulative draft value shown on a live meter that swings from "Got your guys" to "Mega Value", and the best value pick of the whole draft across every team.

📊 Pick-by-pick grades

Every pick is listed with the round it was taken and its ADP, then graded by how much earlier or later it went versus consensus. Green = great value, blue = solid value, gray = on ADP, yellow = slight reach, red = big reach. Starters and bench are listed separately.

🏆 Playoff week correlations

A breakdown of head-to-head matchups among your drafted players during the fantasy playoffs (Weeks 15–17). See exactly which of your players face each other each week, with Week 17 championship matchups flagged in red.

🏈 Draft capital allocation

A breakdown of how much of your draft capital went to each position, compared against optimal targets. Includes a pie chart and plain-language callouts — like "light on RB capital" or "heavy WR investment" — so you know what to watch in your next draft.

Analyze Portfolio

Your entire portfolio,
broken down

Click Analyze Portfolio in the popup to open a full analytics view across all your saved teams. Filter by platform, tournament, and position to see exactly how your builds line up.

Draft Brain NFL Analyze Portfolio window showing player ownership, top two-player combos, team builds, QB stack report, and round allocation

Ownership, combos, team builds, QB stack report, and round allocation

Draft slot distribution, NFL team exposure, and playoff game exposure

🔍 Player ownership

Every player you've drafted, ranked by ownership % and draft count across your entries. Search by player or team and filter by position, platform (Underdog, DraftKings, or both), and individual tournament.

🔗 Top two-player combos

Your most frequently paired players across the portfolio, ranked by count. QB stacks are flagged so you can see which of your combos are correlated builds.

📋 Team builds

How often you land on each roster construction (QB-RB-WR-TE), ranked by frequency. See at a glance whether you're leaning balanced, WR-heavy, or something else across your teams.

🏈 QB stack report

The share of your teams that are naked QB, QB+1, QB+2, or QB+3 or more. Then, for each QB you draft most, see their most common stack partners and how often they're paired.

📊 Round allocation & draft slot

Position share by round shows where you spend picks (RB, WR, QB, TE) across the draft, and draft slot distribution shows which seats you've been drafting from most.

🏆 Team & playoff exposure

NFL team exposure shows how many entries include a player from each team, with your top player for each. Playoff game exposure maps your roster spots across every Week 15–17 matchup, with Week 17 championship games highlighted in red.

NFL Pricing

Free to start. Pro for serious players.

Draft Brain NFL is free for up to 20 saved teams — no card needed, draft as much as you want. Upgrade to Pro for unlimited saved teams, the full portfolio analyzer, and post-draft analysis. More features are planned and will be added over time.

Free

Up to 20 saved teams

PRO

$10/mo

or $100/yr · unlimited teams

Get notified

Stay in the loop

NFL, PGA, and MLB are all live. Drop your email for new features, sports, and updates.

FAQ

Questions

Does Draft Brain NFL work on DraftKings?

Yes. Draft Brain NFL is fully compatible with DraftKings Best Ball drafts. Every feature works on DraftKings, including real-time ownership %, QB stack detection, combo partner badges, the portfolio analyzer, and Post Draft Analysis. One subscription covers both platforms.

What sports does Draft Brain support?

All three overlays — NFL, PGA Golf, and MLB — are available now on the Chrome Web Store. NFL works on both Underdog Fantasy and DraftKings; PGA and MLB run on Underdog Fantasy.

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, and the Analyze Portfolio window is available any time your teams are loaded.

Can other players in the draft see I'm using it?

No. Draft Brain runs entirely in your own browser and is completely invisible to other players in the draft, to Underdog, and to DraftKings.

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?

Both overlays let you draft as much as you want for free, with the free tier capped at 20 saved teams — enough to try the full feature set before upgrading. For unlimited saved teams, NFL Pro is $10/mo or $100/yr, and PGA Pro and MLB Pro are $5/mo or $50/yr.

Is my lineup data private?

Completely. All your team data stays on your own device, nothing is sent anywhere. See our Privacy Policy for full details.

Will it break if Underdog updates their site?

We monitor both Underdog Fantasy and DraftKings for site changes and push updates promptly if anything breaks. If you ever run into an issue after an update on either platform, check back for an updated extension version or reach out to support.

How do I get support or submit a feature request?

Email us at bboverlay@gmail.com for support, bug reports, or feature requests. We read every message and use your feedback to shape future updates and new sports.

Draft
Brain.

Built for NFL.
Expanding to every sport.