Detroit Tigers vs. San Francisco Giants

Platform comparison

Market context

The Detroit Tigers are priced as a modest favourite over the San Francisco Giants, and the prediction market’s 56% YES implies a narrower edge than the sharpest sportsbook quotes. FanDuel lists Detroit at -128 and San Francisco at +118, which translates to roughly a 56% implied win chance before vig, while a recent model pick from numberFire put the Tigers at 60.4%; by contrast, other market screens show consensus near a coin-flip with Detroit only slightly ahead, or even the Giants marginally preferred once vig is removed.[1][7][11]

That gap matters because similar Tigers-Giants pricing has not always lined up cleanly across books or model-based forecasts. For this game, the spread market is also consistent with a close contest: Detroit is generally laid at -1.5 with plus-money returns, while San Francisco is getting the run start, and the total sits around 8.5 runs.[1][7] In practical terms, a 56% market price sits below some analyst-style win probabilities, so the contract is not simply mirroring the most bullish Tigers projections; it is closer to the lower end of the Detroit-favoured range.

Traders should watch the confirmed starting pitchers, any line-up scratches, and late line movement closer to first pitch, because those are the main inputs that can shift a tight moneyline in MLB. The market only resolves on the completed game, so postponement would extend the window, while a cancellation or tie would settle 50-50 under the contract rules. The scheduled start is 10:15 pm ET, leaving limited time for late news to move both sportsbook lines and the prediction market in tandem.

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

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?

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.

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 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.