MLB: ERA Leader

Platform comparison

Active sub-markets

Market context

The real-world event is which qualified pitcher finishes the 2026 MLB regular season with the lowest earned run average, using MLB’s official leaderboard rules for any tie-break. MLB’s own stats pages are the authoritative reference point for season ERA standings, and current public leaderboards already show how quickly the market can swing if one starter strings together a few high-inning, low-run outings.[2][3]

A 1% crowd-implied probability signals that the field is still wide open, which is typical this early in a season for a rate stat that depends on both performance and workload. Historical ERA races are often decided by narrow margins, but they also favour pitchers who stay healthy and keep a rotation spot long enough to qualify; the market therefore tends to track not just run prevention, but innings volume and team usage patterns. Because the settlement window runs to late September, September innings management and any late-season rest decisions can matter as much as early results.

For traders, the main catalysts are team rotation news, injured-list moves, call-ups, and any change in usage that affects qualification for the ERA title. MLB’s official leaderboards and major stat sites update continuously, while contemporary coverage is already highlighting names such as Jacob Misiorowski, Cristopher Sánchez and others among the early 2026 pitching leaders.[2][6] From a market-access perspective, German GlüStV rules are relevant because they can restrict or block gambling-style products for German users, while US CFTC jurisdiction may reach products that are treated as event contracts under US law; a “no-KYC up to $1,500” setup generally means low-friction entry for smaller positions, but it does not remove country-level eligibility checks or payment and identity reviews that may still apply for this specific market.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track MLB: ERA Leader 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 Polymarket Tax UK, 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.

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, Polymarket Tax UK triggers a quick verification flow that finishes in 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.