Houston Astros vs. Philadelphia Phillies odds: Kalshi vs Polymarket
Tue, Sep 8, 2026, 6:40 PM ET · MLB games · $42 traded in 24h across both venues.
Philadelphia Phillies: Kalshi 55¢ vs Polymarket 54¢, +0.5 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.
-4.24¢ per $1, after fees
Buy Houston Astros @ Kalshi 46¢, Philadelphia Phillies @ Polymarket 55¢
All outcomes
| Outcome | Kalshi bid / ask | Polymarket bid / ask | Gap |
|---|---|---|---|
| Houston Astros | 45¢ / 46¢ | 45¢ / 47¢ | -0.5 pp |
| Philadelphia Phillies | 53¢ / 56¢ | 53¢ / 55¢ | +0.5 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.