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Boston Red Sox vs. Tampa Bay Rays

Post
KalshiPolymarket ✓ Verified same-resolution Closes Sep 19, 2026
LIVE PRICES — YES
KalshiTrade ↗
45¢ last
BidAsk
YES44¢45¢
NO55¢56¢
$52,894 volume
PolymarketBEST YES PRICETrade ↗
45¢ last
BidAsk
YES44¢45¢
NO55¢56¢
$27,330 volume
Cross-venue spread 0.0¢
30-DAY PRICE HISTORY
HOW THIS RESOLVES

Kalshi — primary rule

If Boston wins the Boston vs Tampa Bay professional baseball game originally scheduled for Sep 18, 2026 at 7:10 PM EDT, then the market resolves to Yes.

Polymarket — resolution criteria

In the upcoming MLB game between the Boston Red Sox and Tampa Bay Rays, scheduled for September 18 at 7:10PM ET: This market will resolve to "Boston Red Sox" if the Boston Red Sox win the game. This market will resolve to "Tampa Bay Rays" if the Tampa Bay Rays win the game. 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, or ends in a tie, this market will resolve 50-50. 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.

Show full rules
STATS
Cross-venue spread0.0¢
Kalshi last45¢
Polymarket last45¢
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.