Chicago White Sox vs. Baltimore Orioles

Platform comparison

Market context

The Chicago White Sox defeated the Baltimore Orioles 9–3 in their MLB game on 30 June 2026, scoring seven runs before making an out in the third inning, with Colson Montgomery and Junior Perez hitting home runs during Chicago’s dominant third-inning surge[5][6]. This result confirms the market’s 100% YES settlement for “Chicago White Sox”, as the White Sox won the contest outright, leaving no ambiguity for resolution[3].

Historically, similar MLB markets where one team was a clear favourite on the moneyline—such as Baltimore at -139 odds—have resolved decisively when the underdog delivered a high-scoring, early-inning breakout, mirroring cases where a +125 underdog won outright by a large margin[1][2]. In those instances, the conditional tokens on Polymarket settled instantly once the official final statistics were recognised on-chain, with USDC payouts flowing automatically via Polygon without delay, reflecting the reliability of on-chain mechanics when the outcome is unambiguous.

Traders should monitor any post-game announcements regarding player injuries or lineup changes for the next series, as well as the official MLB schedule for potential rain delays or make-up games, though none apply here given the game’s completion[7]. Recent coverage from Sportsline confirms the over/under was set at 10.5 runs, and the White Sox’s 9–3 scoreline fell just under that threshold, a detail that may influence future run-total markets but does not affect this resolved contract[1]. With the settlement window ending 7 July 2026, the market is now closed, and all conditional tokens have been redeemed for their full USDC value.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Methodologically we separate two layers: the live probability (Polymarket mid-price) and the platform attributes (fee, KYC, settlement currency, payment rails). That keeps the comparison honest — a single canonical probability across the row, with the venue-by-venue trade-offs spelt out in the columns next to it.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

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 Polymarket Legit?. 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.

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.

What does Polymarket cost to trade?

Polymarket itself charges 0% — the only cost is the Polygon network fee, typically under $0.01 per transaction. Off-chain venues like Kalshi or Betfair charge 2-7% commission.

How reliable are the quoted odds?

The YES/NO percentages are the live mid-prices of the Polymarket order book. On deep markets they move every few seconds; on thinner ones you'll see short plateaus.