MLB: Doubles Leader

Platform comparison

Active sub-markets

Market context

The market is pricing a 9% chance that the 2026 MLB doubles leader finishes the regular season with the most two-baggers, with YES shares settling via USDC on Polygon if the designated player tops the official MLB table at the end of the season. At that level, Polymarket is treating the field as open rather than anchoring to a clear favourite, which is consistent with how volatile doubles races can be: they often reward high-volume hitters, regular leadoff bats, and players who stay healthy for 150-plus games rather than pure power hitters. Historical leaderboards tend to be decided by contact rate, line-drive profile and playing time more than star reputation, so the market usually remains diffuse until late summer when innings, days off and injury luck start to matter more.

For traders, the key inputs are the evolving MLB stats pages and the everyday usage patterns of likely contenders, rather than one-off headlines. MLB’s official hitting leaderboard and team pages update continuously, while outlets such as ESPN and CBS Sports track the same race in near real time; those feeds matter because the contract resolves to the official MLB leader, with tie-breaks falling to batting average and then slugging percentage if needed. Schedule density also matters: clubs with fewer off-days in August and September can give everyday bats more plate appearances, while injury reports can quickly remove a contender from contention. A recent example is how early-season leaderboard pages have already shown multi-player bunching across MLB, which is the sort of distribution that can keep a 9% market live until the final weeks rather than resolving early.

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 PolyGram, which mirrors the Polymarket order book directly.

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 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.

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.

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.