Colorado Rockies vs. Arizona Diamondbacks (10:10 PM ET) is a prediction market event currently tracked across 3 platforms (Kalshi, Polymarket, ProphetX). Arizona Diamondbacks spread plus 3.5 leads at 87% implied probability, making it the market favorite. Other contenders include Arizona Diamondbacks spread plus 2.5 at 81%, Arizona Diamondbacks at 87%, Colorado Rockies spread plus 4.5 at 79%.

What is moving the odds on "Colorado Rockies vs. Arizona Diamondbacks (10:10 PM ET)"?

Arizona Diamondbacks spread plus 3.5 currently leads at 87% implied probability. Behind Arizona Diamondbacks spread plus 3.5, Arizona Diamondbacks spread plus 2.5 at 81% and Arizona Diamondbacks at 87% and Colorado Rockies spread plus 4.5 at 79% are the next closest contenders. The 36.0% cross-platform spread suggested platforms were pricing new information differently, creating potential trading opportunities.

What are the current odds for "Colorado Rockies vs. Arizona Diamondbacks (10:10 PM ET)" across platforms?

Here are the latest odds across Kalshi, Polymarket, ProphetX: Arizona Diamondbacks spread plus 3.5: 87¢ on Polymarket. Arizona Diamondbacks spread plus 2.5: 81¢ on Polymarket. Arizona Diamondbacks: 99¢ on Kalshi, 63¢ on Polymarket, 98¢ on ProphetX. Colorado Rockies spread plus 4.5: 79¢ on Polymarket. The 36.0% spread across platforms highlights where markets disagree — a gap traders can exploit by buying low on one platform and selling high on another.

What does it mean that Arizona Diamondbacks spread plus 3.5 is at 87%?

A price of 87¢ means the market estimates a 87% probability that Arizona Diamondbacks spread plus 3.5 will be the outcome. Buying one share at 87¢ pays out $1.00 if correct — a 15% return — or $0 if wrong. This is the core mechanic of prediction markets: the price directly reflects the crowd's probability estimate.

Market Rulebook: Colorado Rockies vs. Arizona Diamondbacks (10:10 PM ET)

Official settlement criteria, resolution sources, and edge cases across Kalshi and Polymarket and ProphetX.

Rules for Candidate:

Kalshi

Primary Rule

If Colorado wins the Colorado vs Arizona professional baseball game originally scheduled for May 23, 2026 at 10:10 PM EDT, then the market resolves to Yes.

Edge Cases

The following market refers to the Colorado vs Arizona professional baseball game originally scheduled for May 23, 2026 at 10:10 PM EDT. If this game is postponed or delayed, the market will remain open and close after the rescheduled game has finished (within two days). If the game is cancelled or rescheduled to over two days away, the market will resolve to a fair price in accordance with the rules.

Resolution Oracles

Kalshi Rules

Polymarket

Primary Rule

In the upcoming MLB game between the Colorado Rockies and Arizona Diamondbacks, scheduled for May 23 at 10:10PM ET: This market will resolve to "Colorado Rockies" if the Colorado Rockies 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.

Resolution Oracles

UMA Optimistic OracleConsensus of Sources

ProphetX

Primary Rule

Sports moneyline - resolves based on official game outcome per ProphetX Prediction Rules

Resolution Oracles

ProphetX Rules

Colorado Rockies vs. Arizona Diamondbacks (10:10 PM ET)

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Market Rulebook: Colorado Rockies vs. Arizona Diamondbacks (10:10 PM ET)

Resolution Oracles