Arizona Diamondbacks vs. Kansas City Royals odds: Kalshi vs Polymarket
Tue, Sep 8, 2026, 7:40 PM ET · MLB games · $58 traded in 24h across both venues.
Arizona Diamondbacks: Kalshi 52¢ vs Polymarket 53¢, -0.5 pp
Mid prices. A price is the market's probability: 52¢ means 52%. 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.
-9.23¢ per $1, after fees
Buy Arizona Diamondbacks @ Polymarket 56¢, Kansas City Royals @ Kalshi 50¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Arizona Diamondbacks | 48¢ / 56¢ | 49¢ / 56¢ | -0.5 pp |
| Kansas City Royals | 47¢ / 50¢ | 44¢ / 51¢ | +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.