Washington Nationals vs. Baltimore Orioles

Platform comparison

Market context

The underlying real-world event is the MLB game between the Washington Nationals and Baltimore Orioles, played on Sunday, 28 June 2026 at Oriole Park at Camden Yards, which concluded with a 6–4 victory for the Nationals. Luis García Jr. was the standout performer, homering twice and driving in five runs to secure the win[1][8].

Historically, markets with 100% crowd-implied probability before game completion are rare and typically resolve only when the outcome is already confirmed by live scoring feeds; in comparable cases, such as late-season games where one team leads by multiple runs in the final innings, the market settles immediately once the official result is logged[1][4]. Programmatic traders using conditional order bots would have executed a “settle-on-confirm” strategy, triggering a buy only after the ESPN or CBS Sports feed updated the final score, avoiding exposure to pre-game volatility[1][8].

Key catalysts for traders include the official final statistics release and any postponement or cancellation notices, though none occurred here. The game was streamed on MASN and MLB.TV, with real-time coverage available via The Athletic and CBS Sports, ensuring rapid data propagation for automated systems[4][7]. Recent box score confirmations from The Athletic and CBS Sports provided the definitive resolution source, allowing bots to lock in the outcome within minutes of the game’s end[4][8]. No further announcements or schedule dependencies remain, as the event is fully settled.

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

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 Polymarket Bot UK. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like Polymarket Bot UK trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.