Tampa Bay Rays vs. New York Yankees

Platform comparison

Active sub-markets

Market context

The Tampa Bay Rays travel to face the New York Yankees on 24 May at 1:35 PM ET in a regular-season matchup. The crowd-implied probability of 45% for a Rays victory reflects a modest underdog positioning, suggesting the Yankees are favoured at roughly 55% implied probability.

Historically, the Yankees hold a significant edge in head-to-head records against Tampa Bay, though the Rays have proven competitive in divisional play over recent seasons. The Yankees' larger payroll and roster depth typically translate to market favouritism in neutral matchups, yet the Rays' lean organisational structure has produced consistent regular-season performance. The current 45% probability sits close to the long-term win expectancy gap between these franchises, suggesting the market has priced in standard competitive dynamics rather than overweighting recent form or narrative momentum.

Key variables for traders centre on starting pitcher assignments and roster availability. Injury status updates in the days preceding the fixture—particularly concerning either team's rotation depth or offensive contributors—could shift the probability meaningfully. Daytime games at Yankee Stadium historically favour the home side, though the 1:35 PM start time may reduce typical home-field advantage effects. Recent performance trends, weather conditions at game time, and any last-minute roster moves announced before first pitch warrant close monitoring, as these factors frequently drive late adjustments in prediction markets covering individual games.

Methodology

We track Tampa Bay Rays vs. New York Yankees on the five venues with material liquidity for prediction markets. Live odds come from the Polymarket Polygon order book — the only source that ships real-time data under an open licence. For Kalshi, Betfair and Manifold we list platform attributes (fee, KYC, settlement, payment) instead of fabricated odds, because their APIs use non-comparable contract definitions.

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 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.

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 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.

Do I need to KYC for this market?

Not under $1,500 of lifetime trading volume. Above that threshold, PolyGram triggers a quick verification flow that finishes in minutes.