Same-Game Parlay (SGP)
A same-game parlay combines two or more bets from a single game into one ticket. Sportsbook RI prices the correlations — meaning the payouts are lower than a ‘naive’ parlay would be — but the appeal of building one narrative ticket has made SGPs the fastest-growing wager type in the US.
How SGPs differ from regular parlays
A regular parlay combines bets from different games — legs are statistically independent, so the math is simple multiplication. A same-game parlay combines bets from the same game — which means the legs influence each other.
Example SGP for a Patriots game:
- Patriots −3.5
- Over 47.5
- Drake Maye over 245.5 passing yards
- Patriots WR1 anytime TD
If the Patriots are blowing out an opponent, all four legs likely hit together. Sportsbook RI knows this and prices the parlay accordingly — the payout is lower than if you treated the legs as independent.
How correlations are priced
Sportsbook RI uses a model that calculates joint probability — what’s the chance ALL of these things happen in the same game? A naive parlay calculator would multiply individual odds. The SGP engine multiplies adjusted odds that account for:
- Positive correlation (e.g., Patriots cover + over the total): payout is reduced because both legs are more likely to happen together.
- Negative correlation (e.g., Patriots cover + Patriots RB under rushing yards in a blowout): payout is increased because legs conflict.
- Independent legs (e.g., player props from different units): priced close to naive.
Why SGPs are profitable for the book
SGPs have the highest hold percentage in the industry — often 15–20% on heavily-built tickets. The combination of standard vig + correlation adjustments + customer behavior (people add legs they "kind of like") means books print money on SGPs.
How to bet SGPs more efficiently
- Fewer legs. A 3-leg SGP has a much higher hit rate than a 7-leg SGP, and the cumulative edge is smaller.
- Find positive-correlation legs that aren’t priced as such. Star player goes over their prop + team covers spread is the classic. Newer sportsbooks sometimes underestimate the correlation.
- Avoid contradictory legs. Don’t take Team A −10 and the under in the same SGP — books either won’t allow it or will price it punitively.
- SGP+ (cross-game SGP). Some books let you mix SGPs from multiple games into one parlay — combining the SGP hold issue with regular parlay vig. Avoid.
Availability at Sportsbook RI
SGPs are available on most NFL, NBA, MLB, NHL, and major soccer matches in the Sportsbook RI mobile app. Retail kiosks have more limited SGP support — for full functionality, use the app.