A Same Game Parlay is a multi-leg bet built from correlated selections within a single event (one NFL game, one soccer match), priced by the sportsbook's correlation engine rather than naive odds multiplication.
Same Game Parlay (SGP)
TL;DR: A Same Game Parlay is a multi-leg bet built from correlated selections within a single event (one NFL game, one soccer match), priced by the sportsbook's correlation engine rather than naive odds multiplication.
What it means
Traditional parlays require legs from different games to avoid correlation — you cannot multiply the odds of Lakers to win and LeBron 25+ points and treat them as independent. Same Game Parlay flips that constraint: operators model the joint probability of correlated outcomes inside one match and quote a single price for the bundle. FanDuel popularised the format in 2018, and by 2026 SGPs and SGP-Plus (cross-game) make up 30 to 45% of NFL handle at US books.
The pricing depends on proprietary correlation engines from suppliers like Kambi, IMG Arena, Sportradar, Genius Sports, or in-house quant teams at DraftKings, FanDuel, and bet365. Player-prop legs (passing yards, rebounds, shots on target) typically carry the heaviest correlation modelling.
How it's implemented
Front end: a bet-builder UI where the user toggles selections from the same event card. Back end: a real-time pricing service that combines marginal probabilities, applies correlation adjustments, and re-prices on every leg change. Risk teams cap exposure with max-payout limits ($500K to $1M typical) and per-leg liability monitors.
Why it matters for operators
SGPs are the highest-margin product in modern sportsbook. Effective hold runs 15 to 25%, versus 4 to 6% on straight singles. They are also the most engaging format: average tickets contain 4 to 7 legs, session length is 2 to 3x a single-bet user, and recreational players love the lottery-ticket payout structure. The trade-off is liability concentration on viral parlays (Patrick Mahomes anytime TD + over yards + Chiefs win) that go in.
Common benchmarks (2026)
- SGP share of NFL handle: 30 to 45% at US tier-1 books
- Average legs per ticket: 4.2 to 7.1
- Theoretical hold: 15 to 25%
- Actualised hold after promo (no-sweat SGP, profit boosts): 8 to 14%
- SGP-Plus (cross-game) share: 12 to 20% and growing
Common mistakes
- Treating SGP hold as guaranteed margin without modelling viral-parlay liability
- Failing to cap correlated legs that compound risk (3+ player props on one QB)
- Promo-bombing SGP with no-sweat tokens that destroy realised hold
- Pricing SGP legs identically to straight bets, ignoring correlation
- No leg-removal UX, forcing users to rebuild full tickets and abandon
See also