TOTAL VOLUME:

$154.2b

24H VOL:

$203,036,808

24H TRANSACTIONS:

2,984,028,936

OPEN INTEREST:

$1,857,846,526

408,774

Markets across

40,345

events

MATCHED EVENTS:

4,373

PLATFORM COVERAGE:

5

Polymarket:

37%

VS.

Kalshi:

63%

BETA
Dashboards
Insights
Indices
API
Tour
All
Trending
Breaking
New
Ending Soon
Politics
Sports
Elections
Crypto
Companies
Financials
Economics
Other
Entertainment
Science and Technology
Pro Baseball: Immaculate Innings
kalshi

Pro Baseball: Immaculate Innings

Volume:
$23,811

4+ immaculate innings

 - Kalshi

4+ immaculate innings - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Oct 28, 2026

Closed: Sep 14, 11:47 AM EST

kalshi

Kalshi

View
Join Kalshi and score $25 for your first trade.
Outcome
Trade
Chance %
Price
Spread
Liquidity
Volume
24h
7d
Open Interest
Ends in
Result
kalshi

4+ immaculate innings

View
100%
1%
Yes 100¢No 0¢
—
N/A
$8,154
N/A
N/A
$4,275
4w 19h
Yes
kalshi

3+ immaculate innings

View
100%
59%
Yes 100¢No 0¢
—
N/A
$7,777
N/A
N/A
$3,878
4w 19h
Yes
kalshi

2+ immaculate innings

View
100%
Yes 100¢No 0¢
—
N/A
$3,746
N/A
N/A
$2,755
4w 19h
ResolvedResult not available
kalshi

5+ immaculate innings

View
100%
70%
Yes 100¢No 0¢
—
N/A
$2,332
N/A
N/A
$808
4w 19h
Yes
kalshi

1+ immaculate innings

View
97%
Yes 100¢No 0¢
—
N/A
$1,773
N/A
N/A
$1,519
4w 19h
ResolvedResult not available
kalshi

7+ immaculate innings

View
0%
Yes 0¢No 100¢
—
N/A
$13
N/A
N/A
$13
4w 19h
No
kalshi

6+ immaculate innings

View
0%
Yes 0¢No 100¢
—
N/A
$8
N/A
N/A
$7
4w 19h
No
kalshi

8+ immaculate innings

View
0%
Yes 0¢No 100¢
—
N/A
$8
N/A
N/A
$8
4w 19h
No
Total markets: 8

Intro

This market on Kalshi tracks whether all pitchers combined will record at least two immaculate innings during the 2026 Pro Baseball season, including both regular season and playoff games. An immaculate inning represents one of baseball's rarest achievements—striking out all three batters on exactly nine pitches. The leading outcome currently stands at 72.0% probability. Resolution will be determined by official Pro Baseball records documenting immaculate innings thrown across all 2026 games. Watch for pitcher performance trends and strikeout rates as the season progresses toward the December 2026 resolution date, which will capture the full regular season and playoff activity.

Kalshi

An immaculate inning occurs when a pitcher strikes out all three batters in a single inning using the minimum possible number of pitches: nine pitches, nine strikes, and three strikeouts. Immaculate innings recorded by all pitchers combined across all games during the 2026 Pro Baseball season (regular season and playoffs) will determine resolution. Markets resolve to Yes based on whether the total reaches or exceeds specific thresholds: 2, 3, 4, or 5 immaculate innings.

Frequently asked questions

Prediction market odds often reflect the wisdom of the crowd, potentially offering a different perspective than traditional sportsbooks. Sportsbooks set lines based on their own models and risk management, while this market aggregates the beliefs of many individual traders. It’s common to see discrepancies, especially early on, as prediction markets can incorporate information and analysis more quickly. While sportsbooks may initially focus on public perception, this market can adjust rapidly as informed traders weigh in, potentially revealing a more accurate probability assessment than initial sportsbook offerings.

On Kalshi, this market is priced using a continuous double auction. Traders buy and sell contracts representing their belief about whether the event will occur. The price of a contract reflects the probability of that outcome happening, with higher prices indicating a greater perceived chance. On Kalshi, prices reflect that venue's order book, liquidity, and how traders price the outcome right now. The market dynamically adjusts as traders enter and exit positions, creating a real-time assessment of the likelihood of pitchers recording 7+ immaculate innings. This differs from fixed-odds betting, as the price fluctuates based on supply and demand within the market itself.

This market resolves around Dec 1, 2026, with the outcome confirmed once the event is verifiable from credible public reporting. Specifically, the resolution will be based on official MLB statistics tracking the number of immaculate innings pitched during the 2024 MLB season. The final result will be determined by whether at least seven immaculate innings were recorded across all MLB pitchers throughout the season. The outcome will be based on official MLB data and verified against credible public sources to ensure accuracy and transparency.

Several factors could influence the price of this market. Early-season pitching performances, particularly dominant starts by pitchers with a history of high strikeout rates, could drive up the price. Injuries to key starting pitchers could have the opposite effect, lowering the probability of enough immaculate innings being recorded. Any news regarding rule changes that might impact pitching or hitting could also move the market. Furthermore, unexpected weather patterns leading to a higher number of postponed games could also influence traders’ assessments, as fewer opportunities would be available for pitchers to achieve this rare feat.