San Diego Padres vs. Baltimore Orioles

Platform comparison

Active sub-markets

Market context

The San Diego Padres travel to Baltimore on 12 June for an evening matchup against the Orioles, with the settlement window extending to 19 June to accommodate any postponements. The current 100% implied probability reflects either a data error or an extreme consensus that warrants scrutiny given standard MLB volatility.

Historical precedent suggests caution with such extreme readings. In comparable regular-season contests between mid-table teams, crowd-implied probabilities above 95% have frequently resolved against the favoured side within the settlement window. Weather delays, roster adjustments announced in the days preceding the fixture, or late-inning developments routinely shift outcomes. The Orioles' recent form and home-field advantage—factors that typically command 5–15 percentage points in June matchups—appear underweighted if the market is genuinely pricing the Padres at certainty.

Traders should monitor three specific catalysts before settlement closes. First, official injury reports from both clubs, particularly any late confirmations of key position players or starting pitchers, which typically emerge 24–48 hours before first pitch. Second, weather forecasts for Baltimore on 12 June; thunderstorms or extreme heat can affect game conditions and occasionally trigger postponements. Third, any roster moves or roster-related announcements from either organisation, which occasionally surface via beat reporters covering the clubs. The Athletic's coverage of both teams' pre-game preparations has historically flagged material changes to lineup expectations. Given the settlement window extends a full week beyond the scheduled date, the true probability should reflect both the single-game outcome and the non-negligible chance of postponement requiring rescheduling.

Methodology

We track San Diego Padres vs. Baltimore Orioles on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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

Is this market available outside the US?

Sport Prediction is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, Sport Prediction triggers a quick verification flow that finishes in minutes.

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.