MLB: Stolen Bases Leader

Platform comparison

Active sub-markets

Market context

The 2026 Major League Baseball regular season will determine which player accumulates the highest number of stolen bases, with the market resolving on that single leader by late September. Nasim Nuñez currently leads the standings with 31 steals, closely followed by Bobby Witt Jr. at 28, while projections favour Elly De La Cruz and Chandler Simpson for the season end[4][5][7]. The current 8% implied probability suggests the market views the eventual winner as a long shot, likely reflecting the volatility inherent in speed-based statistics where a single injury or roster change can derail a contender.

Historically, stolen base leaders have fluctuated wildly; Rickey Henderson’s career record of 1,406 stands alone, yet single-season leaders often change due to tactical shifts rather than pure talent[1]. In recent years, players like De La Cruz have dominated projections but faced consistency issues, mirroring how the 8% figure accounts for the risk that the current frontrunner may not hold the lead through the final weeks. Traders should monitor team announcements regarding lineup changes, pitcher matchups that favour aggressive baserunning, and the official MLB tie-breaking rules which prioritise caught stealings over total attempts[3].

Regulatory frameworks in Germany under the GlüStV and US CFTC reach create specific accessibility conditions for this market, particularly regarding the "no-KYC up to $1,500" threshold which allows smaller participants to engage without identity verification. This provision significantly lowers the barrier to entry for retail traders who wish to speculate on the leader without navigating complex compliance hurdles, though it does not alter the underlying statistical outcome. Recent coverage from ESPN confirms the tight race between Nuñez and Witt Jr., highlighting the need to watch for late-season schedule dependencies that could favour one player’s team over the other[4].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

We track MLB: Stolen Bases 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 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.

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.