Detroit Tigers vs. Baltimore Orioles

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Active sub-markets

Market context

The Detroit Tigers travel to Baltimore on 24 May for a day game against the Orioles, with the crowd-implied probability sitting at 87% for a Tigers victory. This heavy favouritism reflects Detroit's stronger regular-season positioning, though the settlement window extends to 31 May to accommodate any postponements.

Detroit has held the upper hand in recent matchups against Baltimore, a dynamic rooted in the Tigers' more consistent offensive output and pitching depth through 2025. The Orioles, whilst competitive in their division, have struggled with consistency on the road and against teams with Detroit's calibre of starting rotation. Historical records between these franchises show the Tigers winning roughly 55–60% of meetings over the past three seasons, which aligns reasonably with the current 87% probability, suggesting the market has already priced in Detroit's structural advantage.

The critical variable for traders centres on starting pitcher assignment and injury status in the days preceding the fixture. Detroit's rotation health—particularly whether their ace is available—carries outsized weight given Baltimore's vulnerability to dominant fastball pitchers. Weather conditions at Camden Yards on a late-May afternoon could also shift the dynamics; cool temperatures typically favour pitching-heavy matchups, which would reinforce the Tigers' edge if they've deployed superior arms. Monitor official MLB roster updates and pre-game announcements through 23 May, as any last-minute rotation changes or key player absences could shift the underlying probability meaningfully away from the current consensus.

Methodology

We track Detroit Tigers 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

FAQ

Where can I trade this market with the lowest fees?

On PolyGram, which mirrors the Polymarket order book at 0% fees. Kalshi charges up to 7% per trade; Betfair Exchange takes 2-5% commission on net winnings.

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.

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, PolyGram 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.