TOTAL VOLUME:
$134.1b
24H VOL:
$133,388,117
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,436,095,462
405,232
Markets across
30,526
events
MATCHED EVENTS:
2,693
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Jul 10, 12:19 AM EST
Kalshi
Arizona and San Diego play a professional baseball game on July 9, 2026. The market resolves Yes if the game extends beyond nine innings and requires extra innings to determine a winner.
If Arizona and San Diego go to extra innings in the Arizona vs San Diego professional baseball game originally scheduled for Jul 9, 2026 at 9:40 PM EDT, then the market resolves to Yes.
Prediction market odds and sportsbook odds often diverge because they reflect different participant bases and incentive structures. Sportsbooks set lines to balance action and manage risk, while prediction markets like this one aggregate trader beliefs through continuous pricing. This market's odds may lead or lag sportsbook lines depending on which venue's participants have fresher information or stronger conviction. Comparing the two can reveal where professional traders and casual bettors disagree on the likelihood of an extra-innings result.
On Kalshi, this market is priced through an order-book mechanism where traders buy and sell shares representing yes or no outcomes. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price of each share reflects the collective probability estimate of all active traders at any given moment. As new information emerges—injury reports, weather updates, or lineup changes—traders adjust their positions, moving the price up or down. This continuous repricing ensures the odds remain responsive to real-world developments leading up to the game.
This market resolves around Jul 10, 2026, once the Arizona-San Diego game concludes and the result is verifiable from credible public reporting. The outcome is determined by whether the contest extends into extra innings or concludes within regulation play. Resolution occurs after the final result is confirmed through official box scores and sports data providers, ensuring accuracy before payouts are distributed to winning traders.
Several catalysts can shift odds in this market before resolution. Key player injuries or late roster changes announced before first pitch will influence trader expectations about game length and competitive balance. Weather conditions—particularly wind and temperature—affect ball carry and can increase or decrease scoring pace. Bullpen availability and recent pitching performance also matter; teams with depleted relief arms may be more likely to reach extra innings. Real-time game flow, such as early scoring runs or pitcher efficiency, will drive the most dramatic price movements as the contest unfolds.