Boston Red Sox vs. Baltimore Orioles odds: Kalshi vs Polymarket
Sun, Sep 6, 2026, 1:35 PM ET · MLB games · $37k traded in 24h across both venues.
Boston Red Sox: Kalshi 55¢ vs Polymarket 56¢, -1.0 pp
Mid prices. A price is the market's probability: 55¢ means 55%. The gap is Kalshi minus Polymarket in percentage points.
Two separate exchanges, two accounts. Links may carry a referral code, which never changes what is shown. Disclosures.
-3.24¢ per $1, after fees
Buy Boston Red Sox @ Kalshi 55¢, Baltimore Orioles @ Polymarket 45¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Boston Red Sox | 54¢ / 55¢ | 55¢ / 56¢ | -1.0 pp |
| Baltimore Orioles | 44¢ / 45¢ | 44¢ / 45¢ | 0.0 pp |
Price history, last 3 days
How this is matched
Games are matched across the two exchanges by league, team codes and date. Polymarket prices come from its live order book, Kalshi from its public API. Refreshed every 45 seconds.
What this is not
Read-only. Nothing here places or routes orders and nothing is advice. Fees, slippage and the time it takes to move money between venues are not in these numbers.