Arizona Diamondbacks vs. Cincinnati Reds

Platform comparison

Active sub-markets

Market context

The Diamondbacks travel to Cincinnati for a June 13 afternoon matchup against the Reds, with the crowd currently pricing Arizona's chances at 51%. This represents a near-even split despite Arizona's stronger 2024 regular season record and playoff credentials. The settlement window extends to 20 June, providing a week's buffer beyond the scheduled 4:10 PM ET start, which accounts for potential postponements in what is typically humid weather territory in mid-June.

Historically, home-field advantage in regular season MLB games carries roughly 54% win probability across the league, though Cincinnati's home record this season has underperformed that baseline. Arizona's recent form and pitching depth have made them slight favourites in most matchups this season, yet the 51% reading suggests the market is pricing in either Cincinnati's home advantage or uncertainty around starting pitcher availability. The Reds' offensive struggles against left-handed pitching remain a relevant constraint if Arizona deploys that option.

Key variables for traders include confirmation of starting lineups by game time, any late injury announcements affecting either rotation, and weather conditions that could influence afternoon play in Cincinnati. Recent reports on both teams' bullpen usage patterns matter given the likelihood of a competitive game; if either side has deployed key relievers heavily in the preceding 48 hours, that shifts the calculus. The settlement mechanism's 50-50 tie provision is unlikely to trigger but worth noting given the low probability of game cancellation without a make-up date in modern MLB scheduling.

Methodology

This page reviews Arizona Diamondbacks vs. Cincinnati Reds across five venues. We show live odds for Polymarket-based markets (sourced from the Polygon order book); for other venues we list platform attributes, since the comparable contracts are not exposed via a public API on every venue. Every CTA points at Prediction Today — the application we operate, where you trade directly against the Polymarket order book at 0% fees.

Resolution & payout

Polymarket-based markets settle through the UMA Optimistic Oracle on Polygon. A proposer submits the outcome, a two-hour challenge window opens, and unchallenged proposals finalise the resolution. Payouts settle automatically in USDC the moment the result is final — no bookmaker, no delay.

Kalshi-based markets settle in USD via the CFTC-regulated clearinghouse. Betfair Exchange settles in GBP/EUR net of commission. Manifold is play-money and does not pay out real funds.

FAQ

Where can I trade this market with the lowest fees?

On Prediction Today, 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.

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 Prediction Today?

Zero. Prediction Today 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.

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.