Cleveland Guardians vs. Detroit Tigers

Platform comparison

Active sub-markets

Market context

The Cleveland Guardians face the Detroit Tigers in Detroit this afternoon, with the market pricing Cleveland at 16% despite recent head-to-head results leaning the other way. Cleveland beat Detroit 8-2 on Monday and followed that with a 3-2, 10-inning win on Wednesday, so the Guardians have already taken the first two games of this series. That said, a low YES price often reflects the exact spot and moneyline framing rather than raw recent form: on Polymarket the contract trades as a straight probability, while on Kalshi, Betfair and Smarkets the same view is usually expressed through prices that embed spread, commission and, depending on the venue, account-friction or tax effects.

For comparable cases, short-run baseball markets are usually driven more by starting pitcher, lineup availability and bullpen usage than by the last two final scores. Detroit has now dropped three straight to Cleveland, but those results also suggest the series has been tight enough to swing on late innings rather than early run production. ESPN’s game page for Monday’s 8-2 Cleveland win and CBS Sports’ recap of Wednesday’s extra-innings result both point to the same pattern: the Guardians have been finishing better, but the gap has not been large. In probability terms, a 16% YES implies the market is still treating Detroit as the stronger side at home, with Cleveland needing another above-average performance to justify the price.

Traders should watch for the confirmed starting pitchers, any late batting-order changes and whether either club is protecting relievers after Wednesday’s extra innings. The game is scheduled for 1:10pm ET, so the most important catalyst is the official line-up card and any pre-game injury note from team reporters or MLB beat coverage. Platform structure can matter here: Polymarket’s crowd price is the cleanest read on implied probability, whereas Kalshi often gives a more direct US-regulated alternative with KYC requirements; Betfair and Smarkets may show a slightly different effective price once exchange commission is included. If the game is delayed, the contract stays open until completion, so weather and scheduling changes are also relevant.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares Cleveland Guardians vs. Detroit Tigers specifically across Polymarket, Kalshi, Betfair Exchange and Smarkets. Live odds come from the Polymarket order book; the other venues' contract details are maintained manually because their APIs aren't directly comparable. Every CTA routes to PolyGram, which mirrors the Polymarket order book at 0% fees.

Resolution & payout

Settlement is the biggest difference between the four platforms: Polymarket on-chain in USDC (instant), Kalshi USD via CFTC (T+1), Betfair and Smarkets in local currency via bank withdrawal (T+1 to T+3). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

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.

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.