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Chicago Cubs vs. Seattle Mariners

Live odds for "Chicago Cubs vs. Seattle Mariners" pulled from the Polygon order book, alongside the platform attributes of every venue that runs this contract.

1st 5 Innings O/U 2.5 71% O/U 6.5 61% 1st 5 Innings O/U 3.5 56% Chicago Cubs vs. Seattle Mariners 53% Volume: $90K Liquidity: $1.7M Closes: 30 Aug 2026
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Chicago Cubs vs. Seattle Mariners

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Kalshi Fees) Pick
polygram.ink (preferred broker)
 71% 29% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Place a position →
Polymarket (direct)
polymarket.com
 71% 29% 0% Geo-blocked in US/UK/EU USDC, on-chain Place a position →
Kalshi
kalshi.com
 — — Up to 7% per trade US-only, KYC required USD Place a position →
Betfair Exchange
betfair.com
 — — 2-5% commission Full KYC from first trade GBP / EUR Place a position →
Manifold Markets
manifold.markets
 — — Play-money (mana) None — play-money Mana (no cash-out) Place a position →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
1st 5 Innings O/U 2.571%
O/U 6.561%
1st 5 Innings O/U 3.556%
Chicago Cubs vs. Seattle Mariners53%
O/U 7.550%
NRFI47%
1st 5 Innings O/U 4.545%
O/U 8.541%
Spread -1.539%
1st 5 Innings O/U 5.532%
Spread -1.531%
1st 5 Innings Spread -1.528%
Spread -2.528%
1st 5 Innings Spread -1.527%
1st 5 Innings O/U 6.522%
Spread -2.520%
Extra Innings8%

Market context

Based on real-money crowd forecasting, chicago cubs vs. seattle mariners stands at 71% likelihood according to current market consensus. In the upcoming MLB game between the Chicago Cubs and Seattle Mariners, scheduled for August 23 at 4:10PM ET: This market will resolve to "Chicago Cubs" if the Chicago Cubs win th…

Live Data & Statistics

The Polymarket order book prices 1st 5 Innings O/U 2.5 at 71% for "Chicago Cubs vs. Seattle Mariners".

1st 5 Innings O/U 2.5 71% Other 29%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $90K.

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to Kalshi Fees, which mirrors the Polymarket order book directly.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?
Polymarket is geo-blocked in the US/UK/EU. The easiest 0%-fee broker into the same order book is Kalshi Fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.
Is this market available outside the US?
Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.
How does resolution work?
Through the UMA Optimistic Oracle on Polygon: a proposer submits the outcome, a two-hour challenge window opens, and USDC payouts settle automatically once the result is final.
What's the difference between YES and NO shares?
A YES share pays $1.00 if the event happens, $0 otherwise. A NO share pays $1.00 if the event doesn't happen. The market price between 0¢ and 100¢ is the implied probability.
How fast are USDC deposits?
Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within minutes.
Alex ChenAlex ChenPrediction Market AnalystandJordan LeeJordan LeeSports Prediction Reporter

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