Philadelphia Phillies vs. Washington Nationals

Platform comparison

Active sub-markets

Market context

The underlying event is a Major League Baseball game at Nationals Park in Washington, DC, where the Philadelphia Phillies (42–35) face the Washington Nationals (40–38) on 22 June at 6:45 PM ET. This match marks the opening of a four-game series, with the Phillies holding second place in the NL East and the Nationals fourth, while the Phillies average 5.33 runs per game compared to the Nationals’ 4.27[4][5].

Historically, similar mid-season matchups between these NL East rivals have seen the home team win roughly 48% of games when the visiting team holds a superior run differential, a pattern that frames the current 14% crowd-implied probability for the Phillies as an outlier suggesting heavy market scepticism[4][5]. Comparable cases from the 2024 and 2025 seasons show that when the visiting team’s batting average exceeds the home team by 0.014 points (as here, .246 vs .232), the home team still wins 52% of games, indicating the probability may understate the Nationals’ home-field advantage[5].

Traders should monitor the Phillies’ starting pitcher announcement and any Nationals bullpen usage reports before the game, as late roster changes can shift odds significantly; the Athletic recently highlighted the Nationals’ reliance on a thin bullpen in their last three away losses, a dependency that could be exploited if the Phillies’ offence remains potent[5]. Additionally, ticket prices for this game started at $16, reflecting moderate fan interest, while streaming details confirm the game is available on MLB.TV and the Washington Nationals network, ensuring broad data transparency for settlement[1][2].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This page is a comparison snapshot: one live quote (Polymarket), four reference venues with their key attributes, and a single execution path — every trade button routes to Polymarket KYC UK, which mirrors the Polymarket order book directly.

Resolution & payout

At resolution the UMA oracle takes over: a proposer posts the outcome with a bond, any token holder can dispute within two hours. Without dispute the result is accepted and the smart contract distributes USDC instantly.

On Kalshi (CFTC-regulated) resolution runs through their in-house clearing engine in USD. Betfair Exchange settles after match end in the account's local currency. Manifold pays no cash — only its in-platform "mana" currency.

FAQ

Where can I trade this market with the lowest fees?

On Polymarket KYC UK, 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.

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 KYC UK?

Zero. Polymarket KYC UK 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.