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2,633

PLATFORM COVERAGE:

5

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St. Louis Cardinals vs. Arizona Diamondbacks
polymarket
kalshi
predict

Who will win St. Louis Cardinals vs Arizona Diamondbacks?

Volume:
$1,877,756

Arizona

 - Kalshi

Arizona - Kalshi

1W

News

Positive

Negative

Neutral

Hover marker for details

Vol.

·

Resolved Jul 18, 2026

Closed: Jul 18, 6:59 PM 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

Arizona

View
100%
Yes 100¢No 0¢
100¢
N/A
$707,765
N/A
N/A
$427,624
Settled
Yes
polymarket

O/U 7.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$1,143
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$308
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 4.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$175
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -2.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$99
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 2.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$84
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 3.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$60
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -1.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$54
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 6.5

View
100%
Yes 100¢No 0¢
0.1¢
N/A
$32
N/A
N/A
N/A
Settled
Yes
predict

St. Louis Cardinals vs. Arizona Diamondbacks

View
1%
Yes 1¢No 99¢
—
$419
$15,300
N/A
N/A
N/A
Settled
No
polymarket

St. Louis Cardinals vs. Arizona Diamondbacks

View
0%
Yes 0¢No 100¢
—
N/A
$379,390
N/A
N/A
N/A
Settled
Yes
kalshi

St. Louis

View
0%
Yes 0¢No 100¢
100¢
N/A
$693,040
N/A
N/A
$387,394
Settled
No
polymarket

Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$48,316
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 9.5

View
0%
Yes 0¢No 100¢
—
N/A
$26,163
N/A
N/A
N/A
Settled
Yes
polymarket

NRFI

View
0%
Yes 0¢No 100¢
—
N/A
$2,486
N/A
N/A
N/A
Settled
No
polymarket

Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
$1,706
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 8.5

View
0%
Yes 0¢No 100¢
—
N/A
$721
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -3.5

View
0%
Yes 0¢No 100¢
—
N/A
$275
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 5.5

View
0%
Yes 0¢No 100¢
—
N/A
$175
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -4.5

View
0%
Yes 0¢No 100¢
—
N/A
$160
N/A
N/A
N/A
Settled
Yes
polymarket

Spread -5.5

View
0%
Yes 0¢No 100¢
—
N/A
$110
N/A
N/A
N/A
Settled
Yes
polymarket

O/U 10.5

View
0%
Yes 0¢No 100¢
—
N/A
$108
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings O/U 6.5

View
0%
Yes 0¢No 100¢
—
N/A
$66
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -1.5

View
0%
Yes 0¢No 100¢
—
N/A
$20
N/A
N/A
N/A
Settled
Yes
polymarket

1st 5 Innings Spread -2.5

View
0%
Yes 0¢No 100¢
—
N/A
N/A
N/A
N/A
N/A
Settled
Yes
Total markets: 25 of 26

Intro

This market tracks the winner of an MLB game between the St. Louis Cardinals and Arizona Diamondbacks scheduled for July 18, 2026 at 4:10 PM ET. Across Polymarket, Kalshi, and Predict, the consensus probability for a Cardinals victory stands at 95.0%, as resolved by MLB.com official records. Watch for the final game outcome on July 18, 2026, which will determine settlement across all three platforms.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi's winner market contains a logical contradiction: it specifies Yes resolution for both possible game outcomes (Cardinals win and Diamondbacks win), making it impossible to determine a single resolution state. Polymarket and Predict use standard binary logic with unified tie/cancellation handling.Hero tip: Avoid Kalshi's winner market entirely until the platform corrects the resolution logic. Trade Polymarket or Predict for the game winner, which have consistent binary structures. The first-inning scoring market on Polymarket is independently resolvable and consistent.

Critical divergence points:

  • Polymarket: Binary winner market: Cardinals win resolves to Cardinals outcome, Diamondbacks win resolves to Diamondbacks outcome. Tie or cancellation with no makeup resolves 50-50. Source: MLB.com official statistics within 24 hours or credible consensus.
  • Predict: Binary winner market: Cardinals win resolves to Cardinals outcome, Diamondbacks win resolves to Diamondbacks outcome. Tie or cancellation with no makeup resolves 50-50. Source: MLB.com official statistics within 24 hours or credible consensus.
  • Kalshi: Yes/No structure with unresolvable logic: states 'If St. Louis wins...resolves to Yes' AND 'If Arizona wins...resolves to Yes'. No specification for No outcome or tie/cancellation handling. This creates a logical impossibility where both mutually exclusive outcomes map to the same resolution.
Our PredictionHero Resolution Divergence Alerts (RDA) are there to help users identify potential differences across platforms. They do not replace or supersede the official rules and description of any prediction market. Users are solely responsible for reviewing and understanding the applicable rules and resolution criteria before placing any trade or bet. If you notice a potential inconsistency, discrepancy, or error in an alert, please report it to our team so we can review and improve the accuracy of our data.

Polymarket

In the upcoming MLB game between the St. Louis Cardinals and Arizona Diamondbacks, scheduled for July 18 at 4:10PM ET: This market will resolve to "St. Louis Cardinals" if the St. Louis Cardinals win the game. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Kalshi

This event covers the St. Louis vs Arizona professional baseball game originally scheduled for July 18, 2026 at 4:10 PM EDT. Resolution is determined by the final outcome of the game: St. Louis victory resolves to Yes for the St. Louis market, while Arizona victory resolves to Yes for the Arizona market. If the game is postponed or delayed, the market remains open and closes after the rescheduled game concludes within two days. Should the game be cancelled or rescheduled more than two days away, the market resolves to a fair price in accordance with applicable rules.

Predict

In the upcoming MLB game between the St. Louis Cardinals and Arizona Diamondbacks, scheduled for July 18 at 4:10PM ET: This market will resolve to "St. Louis Cardinals" if the St. Louis Cardinals win the game. This market will resolve to "Arizona Diamondbacks" if the Arizona Diamondbacks win the game. If the game is postponed, this market will remain open until the game has been completed. If the game is canceled entirely, with no make-up game, or ends in a tie, this market will resolve 50-50. The primary resolution source for this market is the official final statistics of the event as recognized by the governing body or event organizers. However, if the governing body or event organizers have not published final match statistics within 24 hours after the event's conclusion, a consensus of credible reporting may be used instead.

Frequently asked questions

The dashboard aggregates prediction market activity across Polymarket and Predict for the Cardinals vs. Diamondbacks matchup, displaying real-time odds and consensus forecasts from both venues. Combined volume across platforms reflects $1,877,756, with 24-hour volume at $1,811,525, showing active trader interest in this event. The interface surfaces the leading outcome and price movements, allowing you to compare how each platform's community is pricing the game. This cross-platform view helps traders spot opportunities and understand where consensus is strongest.

Prediction markets and sportsbooks price events differently because they operate under distinct incentive structures. Sportsbooks set odds to balance action and lock in profit margins, while prediction markets reflect pure trader belief—the crowd's genuine forecast. Prediction market prices often converge toward true probability over time, especially as event dates approach and new information surfaces. However, sportsbook odds may incorporate sharper professional betting syndicates and real-time line management. Comparing the two can reveal whether this market is pricing in factors the books have missed or vice versa.

Key catalysts include roster updates, injury reports, and weather conditions closer to game day. Betting line movements at major sportsbooks often precede prediction market shifts, signaling where sharp money is flowing. Recent team performance, head-to-head records, and bullpen or lineup changes can reshape trader expectations. Breaking news about player availability or venue factors may trigger rapid repricing. As the game date approaches, accumulating information typically reduces uncertainty, tightening odds around the most likely outcome. Active traders monitor sports news feeds and sportsbook action to stay ahead of market moves.