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: Sep 22, 9:11 PM EST
Kalshi
The St. Louis vs Pittsburgh contest on September 22, 2026, could stretch into overtime play if neither side secures a lead by the end of the ninth inning. Extra innings are triggered by a tie score, requiring both clubs to keep playing successive innings until one emerges victorious at the conclusion of an inning.
If at least 1 extra inning is played in the St. Louis vs Pittsburgh professional baseball game originally scheduled for Sep 22, 2026 at 6:40 PM EDT, then the market resolves to Yes.
On Kalshi, this market is priced through a continuous order book where traders buy and sell contracts representing the probability of extra innings occurring. The price of a contract reflects the market’s collective belief about the likelihood of that outcome. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. As more traders participate and new information becomes available, the price adjusts to reflect the evolving consensus. The current price indicates what traders are willing to pay for a contract that pays out if extra innings happen in the game.
This market resolves around Sep 23, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Resolution will depend on whether the St. Louis versus Pittsburgh game officially goes into extra innings according to official MLB game records. The final result will be determined by the official game statistics, and the market will settle based on whether extra innings were played during the originally scheduled game or any subsequent continuation of the game.
Several factors could influence the price of this market. Any news regarding potential starting pitchers, weather forecasts predicting rain delays (which could impact the game length), or injuries to key players could all shift trader sentiment. Changes in public perception, perhaps driven by expert analysis or social media discussion, can also play a role. Unexpected in-game events, such as a high number of strikeouts or a close score, might also cause the market to react as traders reassess the probability of extra innings.