Detroit Tigers vs. Baltimore Orioles

Platform comparison

Active sub-markets

Market context

The Detroit Tigers visit the Baltimore Orioles on 22 May, with the contract settling on the game’s official result. The market’s 45% YES price implies Baltimore is a modest favourite, broadly in line with a near coin-flip matchup rather than a strong home edge. In that sense, the contract sits between a moneyline market that would usually be shaded by starting pitcher, bullpen availability and home field, and a prediction market that can move more slowly if traders wait for line-ups or late injury news.

Recent form gives a useful historical frame. Baltimore have already shown how volatile their results can be: MLB.com reported they were swept by Detroit in a recent series and had allowed 17 runs while scoring only five, which is the sort of stretch that can depress short-term confidence even when longer-run talent is respected. Comparable MLB moneylines in games between evenly matched clubs often cluster in the high-40s to low-50s once the market has full information, so a 45% yes price suggests traders are not pricing Baltimore as a clear edge despite the home setting.

The main catalysts before first pitch are the confirmed starters, batting orders, and any bullpen or travel news, because those can shift both sportsbook and market pricing quickly. The settlement window extends to 29 May, so a postponement would keep the contract open until the game is completed rather than forcing an early resolution. Any late change to the line-up card, especially if a key hitter is held out or a starter is scratched, is the most likely source of divergence between sportsbook lines, analyst lean and the crowd price.

Sources: 1 · 2 · 3 · 4 · 5

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

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.

What does it cost to trade on PolyGram?

Zero. PolyGram routes every order to the live Polymarket order book; the only cost is the Polygon network fee, typically under $0.01 per transaction.

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.