Detroit Tigers vs. Baltimore Orioles

Platform comparison

Active sub-markets

Market context

The Detroit Tigers visit the Baltimore Orioles on 22 May in an American League game that will settle on the final result if it is completed, with the market currently pricing Detroit at 45% to win. That is close to a coin flip and broadly consistent with a matchup where home advantage and bullpen usage can move the price materially in either direction. Detroit arrive with recent momentum after a sweep of Baltimore at Comerica Park, including Tarik Skubal’s six shutout innings in the opener, which is the clearest recent result in the head-to-head record.

For context, a 45% implied chance leaves the Tigers as a live underdog rather than a clear false favourite, so traders will usually read the market through starting pitching, lineup news and venue effects rather than through any long-run team ranking alone. Baltimore being at home matters here: in MLB, short series often swing on one strong start, and a game lined this close can turn quickly if either club is forced into early bullpen work. That makes the market more sensitive than usual to confirmed line-ups and late scratches than to the broader season record.

The main catalyst to watch is the official starting pitcher announcement and any late injury or rest updates before first pitch, since those are likely to be the biggest drivers of any move away from 45%. Recent coverage on YouTube and betting-preview outlets has already framed the game as a tightly priced contest, with one preview leaning Baltimore at home, while the Tigers’ recent sweep has kept Detroit’s profile elevated. If either side makes an unexpected roster change, or if weather threatens a delay, that would matter because postponed games stay open until completed, while a cancellation would force a 50-50 settlement.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page tracks Detroit Tigers vs. Baltimore Orioles across four political prediction venues. Live odds come from the Polymarket order book (the deepest political prediction-market book). Kalshi is the CFTC-regulated US alternative, Betfair the established UK sports-exchange with politics markets, Manifold the open play-money variant. PolyGram routes every trade through to Polymarket — at 0% fees.

Resolution & payout

For political markets the resolution source is decisive. Polymarket defines a concrete source per contract (e.g. AP, Reuters, official electoral commission) and uses the UMA Optimistic Oracle as the on-chain dispute mechanism. With a clearly defined outcome the USDC payout lands within minutes of the final confirmation.

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.

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 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.