Detroit Tigers vs. Seattle Mariners

Platform comparison

Market context

The Tigers–Mariners contract is trading at **46% YES**, so Polymarket is close to pricing this as a near coin flip on whether Detroit wins the game, with settlement in **USDC** via Polygon-based conditional tokens once the official result is known. With the market set to resolve on the completed game rather than the scheduled start, traders are really pricing the final score, not the pregame headline.

That 46% sits in the middle of a matchup that has already swung sharply in the recent head-to-head. Detroit beat Seattle **7-3** in early June and then **8-0** in the next meeting, while Seattle also logged a **4-0** win in the same stretch, showing a series that has not followed a simple home/away pattern.[2][1][5] Longer term, Mariners previews have pointed to stronger pitching and better recent form than Detroit, but the Tigers have shown they can score in bursts and punish Seattle when contact hits fall.[6] For a market like this, that mix usually keeps the implied probability from drifting far from the middle until line-ups and starting pitchers are locked in.

The main catalysts are the **confirmed starters**, late injury or rest announcements, and any schedule changes that could force a postponement and extend the conditional token’s life beyond the planned window. MLB’s official game status and final statistics are the key inputs for settlement, so any rain delay or doubleheader adjustment matters to Polymarket users as much as the on-field edge. The most useful live signals are whether Seattle’s pitching advantage holds, whether Detroit names a line-up that keeps its recent run production intact, and whether either club makes a late scratch that shifts the pregame moneyline away from the current near-pick’em.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote, four reference venues with their key attributes, and a single execution path — every trade button routes to PolyGram, which mirrors the Polymarket order book directly.

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

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

Is this market available outside the US?

Polymarket itself is geo-blocked in the US/UK/EU. Always check the legal status of prediction markets in your jurisdiction before trading.

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.

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.