New York Yankees vs. Boston Red Sox

Platform comparison

Active sub-markets

Market context

The upcoming MLB clash between the New York Yankees and Boston Red Sox at Fenway Park on 25 June has already concluded, with the Red Sox securing a decisive 6–3 victory. This result renders the current crowd-implied probability of 0% for a Yankees win accurate, as the game is no longer open for trading. Unlike live markets on Polymarket where implied probability shifts dynamically with in-play events, platforms like Kalshi or Betfair typically settle once the official final statistics are recognised by the governing body, which in this case confirms the Red Sox win.

Historically, Yankees–Red Sox matchups at Fenway often favour the home side when the Yankees are heavily favoured on the moneyline, yet the Red Sox have repeatedly overturned such odds in recent seasons, including this specific game where they won despite New York being listed at –142 to –156[1][7]. Traders comparing decimal odds on Smarkets with implied probability models on Kalshi should note that fee structures diverge significantly: Polymarket charges no platform fee but may incur gas costs, whereas Betfair applies a commission on winnings, affecting net returns on similar outcomes.

Key catalysts for future Yankees–Red Sox games include starting pitcher announcements and injury updates, though none apply here as the game is settled. Recent analysis from Covers.com highlighted the Red Sox as a strong underdog play given their in-season trends[1]. For platforms requiring KYC like Kalshi versus the more accessible Polymarket, the divergence in user reach influences liquidity depth, particularly on settled markets where only post-resolution data remains available for verification.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page compares New York Yankees vs. Boston Red Sox 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

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.

Is this market available outside the US?

PolyGram 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.

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.