About Slip Surgeon

Slip Surgeon is a one-person project built by JB in Michigan, for NBA and NFL player-prop bettors who use FanDuel or BetMGM. The goal is simple: show the math behind every lean, make slips quick to load, and keep the free tools actually free.

How the model works

Fresh FanDuel lines. Every refresh pulls the current FanDuel Sportsbook (Michigan) prices. We strip the book's margin to get a fair price for each leg. BetMGM lines are matched for one-tap slips.
A second source. A public projection has to land on the same side of the line as our own number, or the leg is dropped.
Game logs. Recent box scores (ESPN for the NBA, nflverse for the NFL) give each player's current form.
Injuries. One shared status file built from the official NBA injury report and ESPN, refreshed through game day and re-checked live on the tools. Out and doubtful players are removed; questionable and game-time players (including possible rest days) are tagged and never used as a featured pick until confirmed active.
Defense vs position. How much each defense allows to each position, compared with the league average (NBA, NFL).
Conservative by design. We pull our number back toward the market so we don't oversell an edge. A lean only shows when our chance beats the chance the FanDuel price implies.

How we build a slip

Slip Surgeon is an independent NBA and NFL data project, created by WYA. Every number comes from FanDuel and BetMGM (Michigan) prices and public stats (ESPN, nflverse and the official NBA injury report), rebuilt every hour. How we build a slip: max 3 legs, all from one game, each line one alt step down, at or below the player's recent median, and no questionable or out players. We don't post a record, and nothing here is a lock.

What we don't do

No locks, no guarantees, and no win-loss or profit claims. These are model picks: a starting point you can water down, swap or skip. We cover NBA and NFL only, and we're not affiliated with FanDuel, BetMGM, the NBA or the NFL.

Free vs Full Access

The tools (Slip Surgery, Defense vs Position, the +500 / +1000 Hunter) and the props pages are free with no account. Full Access is an email with every slip and injury pivots: $5 first month, then $9.99/mo. Cancel anytime.

Play responsibly

21+ only. Bet only what you're fine losing. If gambling stops being fun, call 1-800-GAMBLER or see our responsible gaming page.

Questions: [email protected] · X @TheSlipSurgeon · Instagram @theslipsurgeon

Check your slip free: Slip Surgery +500 / +1000 Hunter Defense vs Position

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