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Seattle Mariners vs. Tampa Bay Rays

Five-platform snapshot of "Seattle Mariners vs. Tampa Bay Rays" — live Polymarket pricing, plus how Kalshi, Betfair and Manifold structure the same contract.

1st 5 Innings O/U 2.5 72% 1st 5 Innings O/U 3.5 59% O/U 7.5 55% NRFI 48% Volume: $197K Liquidity: $926K Closes: 19 Jul 2026
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Seattle Mariners vs. Tampa Bay Rays

Platform comparison

PlatformYES oddsNO oddsFeeKYCSettlement
Polymarket (via Best Prediction Markets) Pick
polygram.ink (preferred broker)
 72% 28% 0% (USDC on-chain) No-KYC up to $1,500 USDC, auto via UMA oracle Live odds →
Polymarket (direct)
polymarket.com
 72% 28% 0% Geo-blocked in US/UK/EU USDC, on-chain Live odds →
Kalshi
kalshi.com
 — — Up to 7% per trade US-only, KYC required USD Live odds →
Betfair Exchange
betfair.com
 — — 2-5% commission Full KYC from first trade GBP / EUR Live odds →
Manifold Markets
manifold.markets
 — — Play-money (mana) None — play-money Mana (no cash-out) Live odds →

Outcome probabilities

Current market-implied probability for each outcome, from the live order book.

OutcomeProbability
1st 5 Innings O/U 2.572%
1st 5 Innings O/U 3.559%
O/U 7.555%
NRFI48%
1st 5 Innings O/U 4.546%
O/U 8.545%
Seattle Mariners vs. Tampa Bay Rays44%
Spread -1.538%
1st 5 Innings Spread -1.533%
1st 5 Innings O/U 5.533%
1st 5 Innings Spread -1.525%
1st 5 Innings Spread -2.524%
1st 5 Innings O/U 6.523%
1st 5 Innings Spread -2.514%
Extra Innings8%

Market context

The Seattle Mariners vs. Tampa Bay Rays prediction market currently prices this outcome at 72% YES. In the upcoming MLB game between the Seattle Mariners and Tampa Bay Rays, scheduled for July 12 at 1:40PM ET: This market will resolve to "Seattle Mariners" if the Seattle Mariners win the game. Thi…

Live Data & Statistics

The Polymarket order book prices 1st 5 Innings O/U 2.5 at 72% for "Seattle Mariners vs. Tampa Bay Rays".

1st 5 Innings O/U 2.5 72% Other 28%

Live stats load when the match begins. Current market odds are shown above. Trading volume: $197K.

Methodology

This page reviews Seattle Mariners vs. Tampa Bay Rays across five venues. The live probability is the Polymarket mid-price, sourced directly from the on-chain Polygon order book; the comparison columns benchmark each venue on fee structure, KYC, settlement currency and payment rails. Every CTA routes to Best Prediction Markets, which mirrors the Polymarket order book at 0% fees.

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

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 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.
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.
Do I need to KYC for this market?
On Polymarket directly, no — it's wallet-based. Intermediary brokers like Best Prediction Markets 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.
Maya TorresMaya TorresFinancial Markets WriterandPriya SharmaPriya SharmaCrypto & DeFi Analyst

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