rosterOS Best Ball Overlay

Best Ball draft overlay for Underdog with player grades, roster guidance, stack analysis, and exposure tracking.

RosterOS is a free, private draft overlay built for Underdog best ball drafters. It reads live draft-room context and combines it with ADP and rank data so you can make faster, clearer picks while you are on the clock: value vs reach, build fit, scarcity timing, stack opportunities, and portfolio combo exposure. ============================== WHAT IS IN THE OVERLAY ============================== PLAYER BOARD TAB 1. Live board with search, position filters, and sort by Rank, Grade, or ADP. 2. Cleaner grade-driven board for faster scan-and-decide workflows. 3. Expanded player rows for deeper pick context. PLAYER BADGES AND SIGNALS 1. S badge (QB Stack): Marks players that create a same-team QB stack with your current roster. It can appear on a QB if you already have that team's WR/TE/RB, or on a WR/TE/RB if you already have that team's QB. 2. P badge (Push Candidate): QB-only. Flags top-tier QBs (A-, A, A+) that are likely to make it back to your next pick based on picks between turns, current stack incentives, and QB-need pressure from other teams. 3. L badge (Leverage): RB-only. Flags the best-ADP backup RB behind a top-20 RB starter drafted by another team, highlighting leverage handcuff opportunities. 4. QB badge (QB Back-Stack Available): WR/TE/RB-only. From Round 8 onward, when you have one QB or fewer, it marks skill players whose team still has an available ranked QB with a later ADP, signaling a player-now/QB-later correlation path. GRADE FACTOR PILLS 1. Value or Reach: Compares current pick cost to ADP context. 2. Build Fit or Build Miss: Shows whether the pick supports your current roster shape. 3. Scarce or Can Wait: Indicates whether this position or profile may dry up before your next turn. 4. Stack-type pills: Surface same-team correlation paths tied to your current roster. STACKS TAB 1. Current stacks grouped by team. 2. Available QB stack targets that match your roster. 3. Back-stack candidates showing QBs with same-team targets available later. ROSTER TAB 1. Emerging Build: Shows the build pattern your draft is forming. 2. Capital by Position: Quick view of positional investment. 3. Roster View: Per-pick ADP value and rank value by position. 4. Team Summary: Team vs ADP and Team vs Rank at a glance. 5. Portfolio Combos: Chalk vs unique pair tendencies from your own draft history. DRAFT PREFERENCES TAB 1. Strategy Preference locks by position group. 2. Scoring Preference controls with expanded presets. 3. Rank Trust options: Very Low, Low, Medium, High, Very High. 4. Stack Aggressiveness options: Very Low, Low, Medium, High, Very High. ============================== HOW IT WORKS ============================== 1. Reads live Underdog draft-room context during active drafts. 2. Applies your Draft Preferences and scoring settings in real time. 3. Updates grades, stack signals, and roster feedback as the board changes. ============================== QUICK START ============================== Step 1. Install RosterOS from the Chrome Web Store and pin it to your toolbar. Step 2. Open the popup once and confirm Overlay Enabled is on. Step 3. Join an active Underdog draft. Step 4. Use Player Board, Stacks, Roster, and Draft Preferences during your pick windows. Step 5. If the overlay does not appear, refresh the draft tab and re-check Overlay Enabled. ============================== OPTIONAL DATA SETUP (RECOMMENDED) ============================== EXPOSURE CSV (UNDERDOG DRAFT HISTORY) Step 1. Export your draft history CSV from Underdog. Step 2. In the popup, go to Data Upload and upload it under Exposure CSV. Step 3. Confirm the Uploaded status, then optionally apply Tournament and Date Range filters. Step 4. Remove it anytime with the X in the upload card. CUSTOM RANKINGS CSV Step 1. In the popup, upload a file under Custom Rankings CSV. Step 2. Use columns Name (or Player) and Rank (or Overall). Step 3. Rankings apply after upload and can be replaced anytime with a new file. ============================== WHY THIS HELPS BEST BALL DRAFTERS ============================== 1. Faster decisions during short pick clocks. 2. Better timing on value vs reach decisions. 3. Clearer stack and back-stack opportunities. 4. Better visibility into how your roster is shaping up. 5. Portfolio-aware combo feedback to avoid overused pair patterns. ============================== FREE AND PRIVATE ============================== 1. Free to use. 2. No account required. 3. Optional preferences and uploads are stored in extension storage. 4. Uses ADP and rankings datasets for live grading context. ============================== IMPORTANT NOTE ============================== RosterOS is designed only for use with Underdog drafts. RosterOS is not affiliated with, endorsed by, or sponsored by Underdog.