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Philadelphia Phillies vs. New York Mets: O/U 9.5

Post
KalshiPolymarket ✓ Verified same-resolution Closes Sep 20, 2026
LIVE PRICES — YES
KalshiBEST YES PRICETrade ↗
44¢ last
BidAsk
YES42¢44¢
NO56¢58¢
$8,567 volume
PolymarketTrade ↗
47¢ last
BidAsk
YES45¢46¢
NO54¢55¢
$2,920 volume
Cross-venue spread 3.0¢· active arbitrage window
CROSS-VENUE ARBITRAGE

Buy YES on Kalshi and NO on Polymarket — total cost 99¢ per $1 payout, locking +1.0¢ per contract before fees.

30-DAY PRICE HISTORY
HOW THIS RESOLVES

Kalshi — primary rule

If Philadelphia and New York M collectively score more 9.5 runs in the Philadelphia vs New York M professional baseball game originally scheduled for Sep 20, 2026 at 1:10 PM EDT, then the market resolves to Yes.

Polymarket — resolution criteria

In the upcoming MLB game between the Philadelphia Phillies and New York Mets, scheduled for September 20 at 1:10 PM ET: This market will resolve to "Over" if the Philadelphia Phillies and New York Mets combine to score 10 or more runs in this game. If the combined total is less than 10, this market will resolve to "Under". If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

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STATS
Cross-venue spread3.0¢
Kalshi last44¢
Polymarket last47¢
Venues2
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The same question at a different strike, deadline or outcome — related, not the same contract. Prices are the latest YES.