Detroit Tigers vs. Cleveland Guardians

Platform comparison

Active sub-markets

Market context

The Detroit Tigers face the Cleveland Guardians on 13 June at 4:10 PM ET in an American League Central matchup. The 56% crowd-implied probability favouring Detroit reflects modest confidence in the home team, though the settlement window extends to 20 June, allowing for postponement resolution. Across major platforms, this probability translates differently: Polymarket displays it directly as 56%, whilst Kalshi would show approximately 1.79 decimal odds, and Betfair's lay odds would sit near 1.82. Fee structures diverge meaningfully—Polymarket charges 2% on winnings, Kalshi takes 2% on both sides, and Betfair's commission varies by liquidity tier, typically 5% on this market depth. Geographic reach also fragments the market: Kalshi operates under CFTC oversight in the US, Polymarket requires non-US residency for most traders, and Smarkets serves primarily European customers with lighter KYC requirements.

Historical context suggests mid-June matchups between these divisional rivals carry elevated variance. The Guardians won the AL Central in 2023 and 2024, yet Detroit's 2024 resurgence—finishing 86–76—established them as competitive opponents. Recent form matters considerably: injury reports on starting pitchers typically shift these markets 3–5 percentage points within 48 hours of game time. Monitor Cleveland's rotation depth, as the Guardians have managed multiple injuries this season. The Tigers' bullpen reliability, questioned through May, improved markedly in early June according to Baseball Reference data, a factor that may not yet be fully priced into the 56% figure across all platforms.

Methodology

We read Detroit Tigers vs. Cleveland Guardians from four platform perspectives: Polymarket (on-chain CLOB), Kalshi (CFTC-regulated exchange), Betfair Exchange (sports book exchange), Smarkets (peer-to-peer betting exchange). Polymarket's live quote comes directly from the Polygon order book; the other three are listed with their platform attributes — fees, KYC, settlement currency, payment options — because a 1:1 contract comparison without API access would be guesswork.

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). Polymarket Alternative routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

FAQ

Is this market available outside the US?

Polymarket Alternative is available in most jurisdictions where Polymarket isn't directly accessible. Polymarket itself is geo-blocked in the US/UK/EU. Always check local regulations.

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 Polymarket Alternative?

Zero. Polymarket Alternative 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.