This event group captures prediction markets on the outcome of the first 5 innings of the MLB game between the Colorado Rockies and Oakland Athletics scheduled for June 13, 2026 at 10:05 PM EDT. Markets track which team is winning (or if tied) at the conclusion of the 5th inning, with some platforms also offering run-margin thresholds.

PredictionHero - Resolution Divergence Alerts (RDA)

Divergence Detected

Issue: Kalshi uses run-margin thresholds (1.5+ or 2.5+ runs) to determine winner, while Polymarket uses simple lead (any margin) at end of 5th inning. Kalshi's four listed conditions are logically redundant and create ambiguity about resolution trigger.Hero tip: Polymarket's three-outcome framework (Colorado/Athletics/Draw) is operationally clearer. Kalshi's threshold approach excludes close games (1-run leads do not trigger Yes). Request clarification from Kalshi on whether conditions are mutually exclusive or cumulative. If trading both platforms, account for the 1.5-run margin floor on Kalshi versus any-margin lead on Polymarket.

Critical divergence points:

Polymarket: Resolves to Colorado, Athletics, or Draw based on who is ahead (any margin) at end of 5th inning. Three separate binary markets. Explicit tie outcome. Key Quote: 'This market will resolve to Athletics if the Athletics is winning the game at the conclusion of the 5th inning.'
Kalshi: Resolves to Yes if either team wins by more than 1.5 runs OR more than 2.5 runs in first 5 innings. Four conditions all map to Yes. Excludes 1-run leads and ties. Key Quote: 'If A's wins by more than 1.5 runs in the first 5 innings... then the market resolves to Yes.'

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 Colorado Rockies and Athletics, scheduled for June 13 at 10:05 PM ET: This market will resolve to "Colorado Rockies" if the Colorado Rockies is winning the game at the conclusion of the 5th inning. This market will resolve to "Athletics" if the Athletics is winning the game at the conclusion of the 5th inning. If the game is tied at the conclusion of the 5th inning, this market will resolve to "Draw". If the game is postponed, this market will remain open until the 5th inning has been completed. If the game is canceled entirely, with no make-up game, this market will resolve 50-50. To know when a postponed game will be played, please check the home team's schedule on MLB.com for the listed team and look for the game described as a makeup game. 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 comprises four spread-based markets evaluating the first 5 innings of the Colorado vs A's professional baseball game originally scheduled for June 13, 2026 at 10:05 PM EDT. Each market resolves based on the run differential at the conclusion of the fifth inning. The A's -2.5 market resolves Yes if Oakland wins by more than 2.5 runs; the A's -1.5 market resolves Yes if Oakland wins by more than 1.5 runs. Conversely, the Colorado -1.5 market resolves Yes if Colorado wins by more than 1.5 runs, and the Colorado -2.5 market resolves Yes if Colorado wins by more than 2.5 runs. If the game is postponed or delayed, all markets remain open and close after the rescheduled game concludes, provided this occurs within two days of the original scheduled date.

Frequently asked questions

Prediction markets like Polymarket and Kalshi operate on peer-to-peer trading rather than fixed sportsbook lines, meaning odds reflect live consensus among traders rather than a bookmaker's margin. Sportsbooks typically build in a 4–5% edge and adjust lines to balance action; prediction markets have no built-in vig and move purely on supply and demand. This often makes prediction market prices more efficient at capturing true probability, especially for niche outcomes like first 5 innings results. However, prediction markets may have lower liquidity than major sportsbooks, so comparing both can reveal arbitrage opportunities or validate your thesis before placing larger bets.

Polymarket and Kalshi can show different implied probabilities for the same outcome because of liquidity, fee structure, participant mix, and how each venue defines the contract. Each platform attracts different trader demographics, liquidity pools, and fee structures, which can cause temporary price gaps. Polymarket's outcome focuses on Athletics winning after 5 innings, while Kalshi's frames the question around Colorado's margin of victory, making direct comparison less straightforward. Additionally, platform-specific rules, settlement timelines, and user bases mean one venue may react faster to breaking news or lineup changes. Arbitrageurs typically exploit these gaps, but they can persist if one platform has significantly lower volume or if the outcomes are genuinely measuring different aspects of the same event.

Lineup announcements, injury reports, and starting pitcher confirmations typically drive early movement in first 5 innings markets. Weather conditions—wind speed, temperature, and humidity—can significantly affect early-game scoring patterns and shift odds. Recent form, bullpen availability, and head-to-head matchups between the teams' top hitters and pitchers also influence trader positioning. Breaking news about roster changes or umpire assignments may trigger sharp action. As game time approaches, live betting and in-game data will tighten spreads, so early movers often capture the widest odds before consensus hardens closer to first pitch.

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