TOTAL VOLUME:
$134.2b
24H VOL:
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2,388,728,490
OPEN INTEREST:
$1,438,389,636
404,028
Markets across
30,214
events
MATCHED EVENTS:
2,681
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 22, 12:34 AM EST
Kalshi
This market tracks whether the Cincinnati Reds and Seattle Mariners professional baseball game scheduled for July 21, 2026 at 9:40 PM EDT will require extra innings to determine a winner. The market resolves Yes if the game goes beyond nine innings.
If Cincinnati and Seattle go to extra innings in the Cincinnati vs Seattle professional baseball game originally scheduled for Jul 21, 2026 at 9:40 PM EDT, then the market resolves to Yes.
Prediction market odds and traditional sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and lock in profit margins, while prediction markets like this one are driven by traders risking real capital on their conviction. This market aggregates the beliefs of many independent forecasters without a built-in margin, potentially offering a purer read on true probability. Comparing the two can reveal where public opinion differs from professional oddsmakers, though both sources provide valuable context for understanding the event's likelihood.
On Kalshi, this market is priced through a continuous order-book mechanism where buyers and sellers submit bids and offers in real time. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price reflects the equilibrium between traders willing to bet on extra innings occurring and those betting against it. As new information emerges—injury reports, weather updates, or lineup changes—traders adjust their positions, moving the price up or down. This dynamic pricing model ensures the market stays responsive to shifting expectations throughout the pre-game period.
This market resolves around Jul 22, 2026, once the Cincinnati versus Seattle game concludes and the final result is verifiable. The outcome is determined by whether the contest extends into extra innings beyond the standard nine-inning format. Resolution occurs after the event is confirmed through credible public reporting, ensuring accuracy and fairness for all traders. Until that point, the market remains open for trading as new developments and pre-game information influence participant expectations.
Several factors can shift this market significantly before game time. Key pitcher announcements, bullpen depth reports, and recent offensive trends for both teams influence extra-inning probability. Weather conditions—particularly wind direction and temperature—affect ball carry and scoring pace. Injury updates to star players or late-inning relievers can reshape expectations about game tightness and fatigue. Lineup changes, historical head-to-head matchups, and each team's recent performance in close games also drive trader sentiment. As these catalysts emerge, watch for sharp price movements reflecting informed traders positioning ahead of first pitch.