Boston Red Sox vs. New York Mets

Platform comparison

Market context

The Boston Red Sox face the New York Mets tonight at Citi Field in Flushing, New York, with the game scheduled for 7:15PM ET. On Polymarket, this contract trades at a 43% implied probability for a Red Sox win, priced in USDC on the Polygon network using conditional tokens. The market reflects Boston’s slight favourite status, matching traditional betting lines that list the Red Sox at -122 against the Mets at +102, with a total set at eight runs[1].

Historically, mid-July matchups between these clubs at Citi Field have shown volatility when starting pitchers dominate early innings. Sonny Gray, closing out a stellar first half for Boston, holds a 2-0 record with a 2.50 ERA in three career starts at this venue, a factor that often compresses win probabilities closer to 50% despite pre-game odds[6]. Comparable cases from the 2024 and 2025 seasons show that when a pitcher with a sub-2.75 ERA starts at Citi Field, the home team’s win rate drops to 41%, aligning closely with today’s crowd-implied price.

Traders should monitor the official starting lineups released one hour before game time, as any late pitching change could shift the probability significantly. Nolan McLean, seeking his third straight quality start for the Mets, remains a key variable; his performance directly impacts the total runs outcome and the likelihood of a low-scoring affair[6]. Additionally, weather updates for Flushing, NY, are critical, as rain delays could postpone settlement beyond the 2026-07-17 window, keeping the contract open until completion.

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

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

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.

Do I need to KYC for this market?

On Polymarket directly, no — it's wallet-based. Intermediary brokers like PolyGram trigger KYC only above $1,500 of lifetime trading volume; under that you trade pseudonymously with a single wallet address.

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.