Round Robin Parlays
A round robin is a set of smaller parlays automatically built from a larger pool of selections — if you pick 4 teams, the round robin can build all possible 2-leg, 3-leg, or 4-leg parlay combinations.
4 teams, 2-team round robin
You pick 4 teams. The system builds all 6 possible 2-team parlays (T1+T2, T1+T3, T1+T4, T2+T3, T2+T4, T3+T4). A $10 stake = $60 total wagered ($10 × 6 parlays).
How It Works at MA Sportsbooks
Round robins are offered at every Massachusetts sportsbook. They are commonly used when a bettor likes 4-8 selections but doesn't want everything riding on one large parlay. The most popular configurations are "2-team round robin" (all 2-leg parlays from N selections) and "3-team round robin" — operators clearly label how many parlays a configuration generates before you confirm the bet.
Pros
- Hedges against a single losing leg
- Spreads risk across combinations
- Strong upside if most legs hit
Cons
- Total stake multiplies fast
- Still parlay-based math (worse than singles)
- Confusing for new bettors
Pro Tips
- Use round robins when you have 4-6 selections of similar confidence
- Smaller stakes per parlay let you absorb 1-2 losing legs
- Compare round-robin EV vs. a flat single-stake portfolio — singles often win