Athletics vs. San Francisco Giants

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Active sub-markets

Market context

The underlying event is an MLB game tonight between the Oakland Athletics and the San Francisco Giants at Oracle Park, with first pitch at 3:45 pm ET. The Giants are favoured by bookmakers at -135, reflecting their 33-46 record and 16-20 home standing, while the Athletics enter as underdogs at +113 despite a comparable 38-42 moneyline trend[1][2]. The crowd-implied 44% YES probability for an Athletics win aligns closely with the betting market’s moneyline odds, suggesting the market is pricing in the Giants’ home-ice advantage but acknowledging the Athletics’ recent 78% against-the-spread success in their last ten games[3].

Historically, similar late-June matchups between these franchises have seen the home team win roughly 60% of contests, yet the Athletics have covered the spread in 61% of their recent road games against the Giants, indicating a pattern where the underdog performs better than the raw win probability suggests[1][3]. For a power-user approaching this programmatically, conditional orders on the Athletics would be justified if the starting pitcher for the Giants, Landen Roupp (5-7, 4.15 ERA), shows fatigue metrics in pre-game warm-ups, as his recent form correlates with higher run totals[5]. Traders should monitor the 8.5-run over/under line, which has moved slightly toward the over, and watch for any late-injury announcements on the Giants’ bullpen, as bullpen depth is a key dependency for low-scoring outcomes[2][4]. A recent Action Network preview notes the Giants’ 2-3 record in their last five games against the spread, reinforcing the volatility in this matchup[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track Athletics vs. San Francisco Giants 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

Settlement runs on-chain. Polymarket's contract logic separates YES and NO shares as conditional tokens; at resolution the winning share lifts to $1.00 and the losing one to $0. The outcome input comes from the UMA Optimistic Oracle, which secures against bad resolution with a bond + dispute window.

Once finalised, the smart contract pays USDC to the holders' wallets within minutes — no withdrawal fees beyond Polygon network gas. Kalshi settles in USD via CFTC clearance, Betfair in account currency net of commission, Manifold in play-money mana with no cash-out.

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 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.

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.