TOTAL VOLUME:
$134.1b
24H VOL:
$141,541,542
24H TRANSACTIONS:
2,388,728,490
OPEN INTEREST:
$1,440,096,988
406,065
Markets across
30,522
events
MATCHED EVENTS:
2,692
PLATFORM COVERAGE:
5
Polymarket:
39%
VS.
Kalshi:
61%
Closed: Sep 7, 5:19 PM EST
Kalshi
A professional baseball contest between the Arizona Diamondbacks and Kansas City Royals is set for September 7, 2026. The event will resolve positively if scoring remains level through the entire nine-inning regulation period, forcing competitors into additional gameplay to determine a winner.
If at least 1 extra inning is played in the Arizona vs Kansas City professional baseball game originally scheduled for Sep 7, 2026 at 2:10 PM EDT, then the market resolves to Yes.
Often, prediction market odds reflect the wisdom of the crowd and can differ from traditional sportsbook odds. Sportsbooks set lines based on their own models and need to account for a profit margin, while this market is driven by traders who are incentivized to accurately predict the outcome. If a significant discrepancy exists between this market and sportsbook lines, it could indicate differing opinions on the probability of extra innings, or that one venue has incorporated information the other hasn't. It’s a useful exercise to compare the two to form your own informed opinion.
On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing the probability of extra innings being played in the Arizona vs Kansas City game. As more people buy contracts, the price increases, indicating a higher perceived probability. Conversely, selling contracts lowers the price. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The price reflects the collective belief of all participants, and the market dynamically adjusts to new information and trading activity. This creates a real-time assessment of the likelihood of the event occurring.
This market resolves around Sep 7, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will be based on whether extra innings were officially played in the Arizona vs Kansas City game as recorded by official baseball statistics. The final result will be determined by the official game records, and the market will settle accordingly. Traders will then receive payouts based on their positions and the final outcome of the game.
Several factors could influence the price of this market. Any news regarding potential pitching changes, weather forecasts impacting playing conditions, or injuries to key players on either the Arizona or Kansas City team could all cause shifts in the odds. Unexpected announcements about the game schedule or venue could also move the market. Even general baseball news and analysis, if it impacts perceptions of the teams' strengths, could influence trading activity and therefore the price of contracts in this market.