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Slip Surgeon, explained simply
Most of the site is free. No sign-up needed.
Tap any question below to open it. New? Try the Start here guide.
The basics
What is Slip Surgeon?
A set of free NBA and NFL betting tools. Made by bettors, for bettors.
Our picks are AI-built from real stats and trends, not group chat guesses. They're model picks, not locks. Use them as a starting point.
Is it free?
Yes, most of it. No sign-up and no card needed. Slip Surgery, Defense vs Position, the player pages, the props pages and the Bet Slip Checker are free. The Parlay Calculator is free once a day. Every locked tool still gives you a free peek.
What do sign-up and Full Access add?
Only extras, and both are optional.
Free email sign-up: 10 more rows on locked tools, 5 calculator runs a day and a free daily slip by email.
Full Access ($9.99/mo, first month $4.99, cancel anytime): every row on every tool, plus the day's AI-built parlays sent to you.
Group chats can charge $50 or more for one person's guesses. Slip Surgeon's picks are built by AI from real stats and trends, and Full Access starts at $4.99 (first month with your free code, then $9.99/mo). Model picks, not locks. 21+ | 1-800-GAMBLER.
Why are some rows blurred?
Some tools show the first rows free and blur the rest. Enter your email to see 10 more for free. Full Access shows them all. You never need to sign up to use the free tools.
Which sportsbooks does it work with?
FanDuel and BetMGM. Prices come from FanDuel, and slips open in either app with one tap.
Every tool, in plain words
Slip Surgery Free
What: Upload a screenshot of your slip and it reads every leg. When: Before you place a bet. Example: You have a 4-leg slip. It flags one leg as weak, suggests a swap, then opens the slip in FanDuel or BetMGM.
Bet Slip Checker Free
What: Paste or screenshot a parlay. It checks each leg against current lines and flags moved lines and ruled-out players. When: Right before a game starts. Example: A player on your slip was ruled out an hour ago. It tells you.
Defense vs Position Free
What: Shows which defenses give up the most to each position. When: To check a matchup. Example: A team gives up the most points to point guards. That's a good sign for a point guard's points over.
Player pages Free
What: One page per player with hit rates, last games, tonight's line and injury status. When: Before adding a player to your slip. Example: He went over 24.5 points in 7 of his last 10 games.
Props pages Free
What: Every game tonight with player lines and our model's leans. When: When you don't know where to start. Example: Open tonight's NBA page and pick a game to look at.
Parlay Calculator Free 1 a day
What: Type in each leg's odds. It shows the payout and the real chance all legs hit. When: Before you lock in a parlay. Example: Two legs at -110 pay about +264. That's $10 to win about $26.
+500 and +1000 Hunter free peek
What: Long-shot combos where our model rates every leg better than FanDuel's price. When: When you want a small bet with a big payout. Example: A 3-leg combo that pays +600. It's still a long shot, so keep the stake small.
Every Quarter free peek
What: NBA players ranked by how often they score 3+ points in all four quarters. When: For quarter-by-quarter bets. Example: A player scored 3+ in every quarter in 8 of his last 10 games.
First Basket & TD free peek
What: Who's most likely to score first, with tip-off win rates and first-shot shares. When: For first basket or first touchdown bets. Example: A center whose team wins most tips and takes the first shot often.
Scorer pages free peek
What: Bigger tables for First Basket, Anytime TD, First TD and NBA tip-offs. When: When scorer bets are your thing. Example: A receiver scored a TD in 6 of his 8 games this season.
Reading the numbers
What does a hit rate like 17/20 mean?
The player went over that line in 17 of his last 20 games. That's 85%.
Higher is better, but it's past results, not a promise. Also check the matchup and if he's playing.
What do odds like +250 mean?
Plus odds show what you win on a $100 bet. +250 means $10 wins $25 profit. You get $35 back.
Minus odds show what you bet to win $100. -110 means you bet $11 to win $10.
Plus = underdog, bigger payout. Minus = favorite, smaller payout.
What's a prop, a leg, a parlay and an SGP?
Prop: a bet on one player's stats, like "over 6.5 rebounds."
Leg: one bet inside a slip.
Parlay: two or more legs on one slip. All of them have to hit.
SGP: same game parlay. All legs come from one game.
What's PRA and an alt line?
PRA: points + rebounds + assists added together.
Alt line: a different line than the main one. Lower is safer but pays less. Higher pays more but hits less.
How to
How do I build a slip from scratch?
1. Open tonight's NBA or NFL props page and pick a game.
2. Tap a player. Check his hit rate and last games.
3. Check the matchup on Defense vs Position.
4. Put 2 or 3 legs in the Parlay Calculator to see the payout.
5. Run the slip through Slip Surgery.
How do I check a slip in Slip Surgery?
1. Screenshot your slip in FanDuel or BetMGM.
2. Open Slip Surgery and upload it. You can also paste the text.
3. Read the rating on each leg. Swap the weak ones if you want.
4. Tap the FanDuel or BetMGM button to open the slip.
If it can't read your slip, DM or @ us on X @TheSlipSurgeon with the screenshot.
Bankroll basics
How much should I bet?
Small amounts you're fine losing. Pick a daily budget before you start and stop when it's gone.
How many legs should I use?
2 or 3. Every extra leg makes the slip harder to hit, even when each leg looks good.
I lost. Should I bet more to win it back?
No. Never chase losses. Take a break and come back another day.
If betting stops being fun, call 1-800-GAMBLER or see our responsible gaming page.
Are the picks guaranteed?
No. Nothing in sports is. They're model picks, not locks: a starting point you can swap, water down or skip.
Model picks, not locks. No guarantees. 21+ | 1-800-GAMBLER