Boston Red Sox vs. Texas Rangers odds: Kalshi vs Polymarket
Thu, Sep 17, 2026, 8:05 PM ET · MLB games · $230 traded in 24h across both venues.
Boston Red Sox: Kalshi 53¢ vs Polymarket 51¢, +1.5 pp
Mid prices. A price is the market's probability: 53¢ means 53%. 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.
-8.84¢ per $1, after fees
Buy Boston Red Sox @ Polymarket 55¢, Texas Rangers @ Kalshi 51¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Boston Red Sox | 50¢ / 55¢ | 47¢ / 55¢ | +1.5 pp |
| Texas Rangers | 45¢ / 51¢ | 45¢ / 53¢ | -1.1 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.