Round Robin Betting Guide: How Round Robins Work, With Examples
Last updated:
A round robin is a set of smaller parlays built automatically from a list of selections. Instead of one all-or-nothing parlay, you spread your picks across every possible combination of a chosen size, so one loss does not sink everything.
This guide explains how round robins are constructed, what they really cost, and when spreading your picks this way beats a single straight parlay.
What a round robin is
A round robin takes a group of selections and creates every parlay of a given size from them. Pick four teams in by-3s and the book builds all four three-team parlays from those four selections.
You are placing several parlays at once, so your total stake is the per-parlay amount multiplied by the number of combinations. The upside is that you can lose a leg and still cash some tickets.
How round robin combinations work
The number of parlays follows simple combinatorics. Three teams by 2s makes 3 two-team parlays. Four teams by 2s makes 6. Five teams by 3s makes 10. Each combination is its own bet at the standard parlay odds.
Because every combination is a separate parlay, your risk is the per-combo stake times the count. A $10 round robin of four teams by 2s is six parlays, so it costs $60, not $10.
Our parlay calculator helps you price each combination so you know the payout for any number of winning legs.
Example bet walkthrough
You pick three teams and play a round robin by-2s at $10 per parlay. That builds three two-team parlays — A+B, A+C, B+C — for a total stake of $30.
If all three teams win, all three parlays cash. If team C loses, the A+B parlay still wins while A+C and B+C lose, so you recover part of your stake instead of losing everything.
Compare that with a single three-team parlay: one loss there means the whole ticket is dead. The round robin trades a smaller top payout for survivability.
Round robin strategy tips
Round robins are a risk-management tool, not a profit machine:
- Use them when you like several plays but want to survive one loss, rather than to chase a bigger number.
- Mind the total cost — the combination count multiplies your stake quickly.
- Keep combinations small. Three or four selections by 2s is far more manageable than six by 3s.
- Shop each leg, since the same compounded-vig logic from parlays applies to every combination.
- Decide your per-parlay stake based on the total outlay, not the per-ticket amount.
Best sportsbooks for round robins
For round robins, an easy builder and clear pricing matter:
- DraftKings — a clean round-robin builder that shows the combination count and total stake up front.
- FanDuel — flexible round-robin options with transparent per-combo pricing.
- BetMGM — supports larger round-robin sets and frequent parlay boosts that can apply to combinations.
Common round robin mistakes
Round robins trip up bettors in two ways:
- Underestimating the total cost. A modest per-parlay stake becomes a large outlay once you multiply by the combination count.
- Using round robins to bet more, not smarter. They limit variance, but they do not overcome the compounded vig of the underlying parlays.
Frequently asked questions
- What is a round robin bet?
- A round robin is a group of smaller parlays built from a list of selections. The book creates every parlay of a chosen size, so one losing leg does not wipe out your whole stake.
- How much does a round robin cost?
- Your total stake is the per-parlay amount times the number of combinations. Four teams by 2s makes six parlays, so a $10 round robin costs $60. Always check the combination count before confirming.
- Is a round robin better than a parlay?
- It is safer, not necessarily more profitable. A round robin lets you absorb a loss and still cash some tickets, but it costs more and carries the same per-leg vig as the parlays inside it.
- How many parlays does a round robin make?
- It depends on the selections and combination size. Three by 2s makes 3, four by 2s makes 6, five by 3s makes 10. The count follows standard combinations, and your stake multiplies with it.
Helpful tools
Glossary terms
Related guides
Educational content for informational purposes only. Not betting or financial advice. Please gamble responsibly. 21+ where applicable.