Houston Astros vs. Minnesota Twins

Platform comparison

Active sub-markets

Market context

The Houston Astros and Minnesota Twins are due to play on 20 May at Target Field, with the market currently showing 0% for Houston and a live betting backdrop that differs sharply by venue. Recent listed prices had Minnesota around -115 on the moneyline and Houston near -105, while ESPN’s game odds page also pointed to the Twins as the home favourite, which is why a zero-implied price for the Astros looks detached from the broader market. On Polymarket, that 0% figure is a pure crowd price; on Kalshi, Betfair or Smarkets, the same event would usually be presented as an implied probability or decimal quote, with the effective price moving after fees, commission or the spread. Access can also differ materially: Kalshi’s account and KYC rules are US-focused, while Betfair and Smarkets are not available to all users in every jurisdiction.

The most useful comparison is not the headline number but how quickly it can move if the starting pitchers or lineups change. ESPN currently lists Houston’s Mike Burrows against Minnesota’s starter, and both clubs were tied 1-1 in the series after the 18 May game, which makes the third game more sensitive to late scratches, bullpen usage and any weather delay. Fox Sports’ box score from the previous meeting shows the Twins won outright and the total pushed, a reminder that recent results can affect both sentiment and trading flow without necessarily changing the underlying matchup. If the game is postponed, the market stays open until a result is official; if it is cancelled or tied, it resolves 50-50, so traders will be watching the schedule and any make-up arrangements as closely as the line itself.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We read Houston Astros vs. Minnesota Twins 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). PolyGram routes every trade directly into Polymarket's on-chain settlement, which is why payouts land fastest.

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.

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 fast are USDC deposits?

Polygon credits deposits after 12 confirmations — usually under 30 seconds. Withdrawals follow the same path and land back in your wallet within 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.