Same-game parlays (SGPs) have specific rules about which bets can be combined. These restrictions exist because certain combinations are too correlated to be priced fairly using simple parlay math.
Why Restrictions Exist
When two bets are positively correlated — when one is more likely to hit if the other hits — combining them in a standard parlay dramatically underprices the joint probability.
Example: Chiefs to win by 10+ AND Mahomes to throw 300+ yards AND Travis Kelce to score a touchdown. If the Chiefs are winning big, Mahomes is throwing a lot and Kelce is involved. These outcomes have very high correlation — they tend to happen together. Pricing them as independent events in a parlay would significantly undervalue the bet.
Books either block these combinations or adjust the SGP odds downward to account for correlation.
Common SGP Restrictions
Typically blocked or adjusted:
- Same team to cover AND that team's QB to have a big game
- Team total over AND same team's key offensive player prop over
- Full game result AND first-half result from the same game (highly correlated)
Typically allowed (with correlation adjustment):
- Opposing team's player props combined with your team's result
- Low-correlation props (kicker field goals + opposing player stats)
- Multiple props from different positions with weaker correlation
The Price Adjustment
Even for combinations that are allowed, SGP prices are adjusted for correlation. A two-leg SGP might pay less than a standard 2-team parlay would because the book models the correlation and reduces the payout accordingly. This adjustment is almost always in the book's favor.
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