Underdog Fantasy · MLB Baseball

Draft Brain
MLB.

The Underdog Fantasy baseball draft assistant. Duplicate detection with live risk cards, plus team-stack, game-stack, and vs-pitcher correlation badges, so you build smarter, more correlated lineups without leaving the draft.

⚡ Install Free on Chrome See features

Free for up to 20 saved teams  ·  Pro from $10/mo

Draft Brain MLB overlay running during a live Underdog Fantasy MLB draft, showing exposure, team stack, game stack, and vs-pitcher badges on player rows
MLB Overlay — Features

Correlation and
duplicate protection

Draft Brain MLB watches your live Underdog MLB drafts and helps two ways: it warns you when your picks are tracking toward a team you've already drafted, and it surfaces stack signals based on the hitters and pitcher you've taken so far.

⚠️
Duplicate detection
As your picks start to overlap with a saved team, a risk card appears showing the match count (e.g. 2/6), which players already match, and which remaining players to avoid, each tagged with its position. The header even hints at what slots are still open on that risky team.
🟢
Team stack (TS)
Players on the same MLB team as a hitter you've already drafted get a TS badge, so you can tap into correlation by stacking teammates who share a lineup and a ballpark.
🔵
Game stack (GS)
Players in the same game as one of your drafted hitters, but on the opposing team, get a GS badge, the classic game-stack correlation play for high-scoring matchups.
🚫
vs-Pitcher warnings
Hitters whose MLB team faces your drafted pitcher get a vs P badge, a flag that drafting them means rooting against your own arm. It takes priority over stack badges so the conflict is never hidden.
📊
Exposure & pairing
Every player shows the percent of your saved teams they appear in. Right after your first pick, a pairing count shows how many of your saved teams pair each player with that opening selection.
⚡
CSV upload & auto-scrape
Load your teams by uploading your Underdog exposure CSV or by scraping your completed drafts automatically. Both validate against the 1 pitcher + 5 hitter roster shape, and they merge cleanly with no duplicates.
In action

Risk cards the moment
a duplicate forms

When your picks start matching a saved team, the overlay shows exactly who matched and who to avoid, color-coded by the team at risk.

Draft Brain MLB overlay showing a duplicate risk card with matched players and players to avoid, plus team stack and vs-pitcher badges

Live MLB draft, one saved team at risk with matched players and avoid list

Badge System

Every badge, explained

Several badges can stack on a single player row when more than one condition applies.

24%
Exposure
The percent of your saved teams that already contain this player. Always visible while teams are loaded.
⚠ 2/6
Danger
This player sits on a saved team that already overlaps your current draft by 2+ players. The row is highlighted in that team's color; multiple colored dots mean the player appears across several risky teams.
TS
Team stack
This player's MLB team matches a team you've already drafted a hitter from, an easy way to find correlated teammates.
GS
Game stack
This player is in the same game as one of your drafted hitters but on the opposing team, the classic game-stack correlation play.
vs P
vs Pitcher
This hitter's team is the opponent of your drafted pitcher, so taking them means rooting against your own arm. It takes priority over TS and GS so the conflict is never masked.
5
Pairing count
Appears right after your first pick. Shows how many of your saved teams pair this player with your current first pick.
Analyze Portfolio

Your whole portfolio,
broken down

The Analyze Portfolio window opens a full analytics view across four cards, plus a summary bar of totals: teams drafted, unique players, top exposure, and top combo count.

Draft Brain MLB Portfolio Analysis window showing player exposures, Flex resolution, draft slot distribution, and top 10 player combinations

Portfolio Analysis, exposures, Flex resolution, draft slot distribution, and top combos

🔍 Player Exposures

An overall exposure table filterable by position (ALL / P / IF / OF / Flex). The chip beside each player shows their most common position, with a dot marking players you've drafted in multiple slot types.

🔀 Flex Resolution

What percent of your Flex slots resolved to infield vs outfield, plus a leaderboard of the players you most often slot at Flex.

🎯 Draft Slot Distribution

Which draft seat (1 through 6) you've drafted from across your portfolio, with your most common round-1 pick at each slot.

🔗 Top Combos

Your most-paired two-player combinations across all saved teams, ranked by count, so you can see your correlation tendencies at a glance.

MLB Pricing

Free to start. Pro for serious players.

Draft Brain MLB is free for up to 20 saved teams, no card needed, draft as much as you want. Upgrade to Pro for unlimited saved teams and the full portfolio analyzer.

Free
$0
Up to 20 saved teams
PRO
$10/mo
or $100/yr · unlimited teams

Install Draft Brain MLB on Chrome →

Stop drafting
blind.

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