Arizona Diamondbacks vs. Houston Astros odds: Kalshi vs Polymarket
Sun, Sep 6, 2026, 2:10 PM ET · MLB games · $34k traded in 24h across both venues.
Houston Astros: Kalshi 51¢ vs Polymarket 52¢, -1.0 pp
Mid prices. A price is the market's probability: 51¢ means 51%. 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.
-3.25¢ per $1, after fees
Buy Arizona Diamondbacks @ Polymarket 49¢, Houston Astros @ Kalshi 51¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Arizona Diamondbacks | 50¢ / 51¢ | 48¢ / 49¢ | +2.0 pp |
| Houston Astros | 50¢ / 51¢ | 51¢ / 52¢ | -1.0 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.