What is a same game parlay?
A same game parlay, or SGP, is a parlay whose legs all come from a single game, such as the winner, the points total and a player prop, priced to account for how those outcomes are linked.
A regular parlay joins bets from different games. For a long time books blocked combinations from the same game, because the legs influence each other. If the quarterback has a huge day, his receiver’s yards and the over both become more likely. That’s correlation.
The SGP is the product that allows it, using a pricing model that adjusts for those links. It’s the US name. UK and European bookies sell the same thing as a bet builder.
Example
One NFL game, three legs:
| Leg | Price | Decimal |
|---|---|---|
| Home team moneyline | −150 | 1.667 |
| Over 44.5 points | −110 | 1.909 |
| Receiver over 59.5 yards | −120 | 1.833 |
If the legs were unrelated, you’d multiply: 1.667 × 1.909 × 1.833 = 5.83, or about +483.
But they are related. A home win with lots of points and a productive receiver is one coherent story. So the book might quote something like +400 instead. At +400, a $25 bet wins $100.
Whether +400 is fair, nobody outside the book can easily tell. That’s the point.
Watch out
- Hidden juice. You can check a spread against other books in seconds. You can’t check an SGP, because every book’s correlation model is private. Margins here are widely reckoned to be the highest on the menu.
- All legs must hit. Six-leg SGPs make great screenshots when they land. You don’t see the ones that didn’t.
- Void rules. If a player in your ticket doesn’t suit up, some books drop the leg and re-price. Others void the whole ticket.
- Negative correlation. Try combining things that fight each other, like the under and a quarterback’s passing over, and the price jumps, or the book refuses the combo.
Fun for a game you’re watching. Keep it to pizza money.