GUIDES · BETSLIP DOCTOR
Why can a sportsbook refuse to combine individually available selections?
A selection’s individual price does not guarantee that a sportsbook will accept it in a parlay with another selection. One reason is that the outcomes may be related or correlated, so the combined market needs different treatment from two standalone prices. DraftKings says it may restrict parlays on selections it considers correlated. That decision belongs to the sportsbook and its market rules. Do not assume two prices imply an accepted combination, or treat the selections as independent when estimating a combined result. This guide explains a general restriction; it does not claim BSD detects every correlation or supports a sportsbook’s entire parlay catalogue.
For Bettors who see separate prices for two selections but cannot add them together in one parlay. · Updated
Separate prices do not confirm a combined parlay
A sportsbook may list prices for two outcomes separately and still decline the request to combine them. The combination is a different market decision because both outcomes now need to be considered together.
DraftKings explains that some selections are considered correlated and that it reserves the right to restrict parlay betting on those outcomes. Exact availability and rules vary by sportsbook and market.
Two individually priced, related outcomes
In a fictional league, imagine separate prices for a team to win its division and for that same team to win the league championship. A sportsbook might treat those outcomes as related and decline to combine them, even though each has its own listing. This hypothetical does not claim either market is currently offered.
Related questions
If both selections have prices, is the parlay guaranteed to be accepted?
No. A sportsbook can restrict a combination even when it lists each selection separately. The combined market has its own availability and rules.
Can I multiply each selection’s probability to get the parlay probability?
Only if the outcomes are independent, which should not be assumed for related selections. Individual prices alone do not establish the joint probability.