MLB: Highest ABS Challenge Success Rate (Team)

Platform comparison

Market context

The 2026 MLB regular season is now underway, and teams are actively testing the new automated ball-strike challenge system, with success rates hovering near a coin flip. This market bets on which club will ultimately post the highest challenge win percentage by October 11, 2026, a threshold currently implied at 36% for the "YES" outcome.

Historically, early-season challenge data has been volatile; spring training saw 1.4% of pitches challenged, aligning with 2025 Triple-A figures, while the first 12 games of the 2026 season showed a 61.3% success rate overall[2][3]. However, team-specific rankings reveal significant divergence, with the New York Yankees at 58.7% and the Mets at 54.5% as of May 18, suggesting that a few aggressive clubs could dominate the leaderboard if they maintain precision[7][10]. The 54% aggregate success rate across nearly 3,000 challenges indicates that consistency, rather than volume, will likely determine the winner[10].

Traders must monitor coaching announcements regarding challenge strategy, as teams receive only two challenges per game and must avoid reckless overturn attempts[8]. Key catalysts include mid-season roster changes affecting catcher-pitcher communication, which directly influences overturn rates—catchers currently hold a 64% overturn rate compared to 42% for batters[4]. Watch for beat reports on teams like the Phillies or Yankees adjusting their challenge frequency, as a shift in approach could rapidly alter their projected win percentage[7]. The settlement window closes precisely at 23:59 ET on October 11, making late-season performance critical for any team trailing the pace[1].

Sources: 1 · 2 · 3 · 4 · 5

Methodology

Sports-specific comparison page for MLB: Highest ABS Challenge Success Rate (Team). Polymarket's live quote (Polygon order book) plus platform attributes for the three reference venues. Sports markets reward liquidity — Polymarket and Betfair are materially deeper than Kalshi or Manifold.

Resolution & payout

Sports markets typically settle on official final-whistle plus league confirmation. Polymarket uses UMA Optimistic Oracle with a source URL per contract — usually official league data feeds or ESPN/Soccerway. Two-hour dispute window, then smart-contract payout in USDC.

FAQ

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When do sports markets resolve?

Typically within hours of the official final whistle. Polymarket uses UMA Optimistic Oracle with source URLs pointing at official league data feeds — e.g. the Premier League for EPL markets, UEFA for Champions League, FIFA for World Cup.

How fast do sports winnings settle?

Once the official league outcome is logged in the UMA Oracle (typically 1-2 hours after the final whistle), Polymarket's smart contract triggers USDC payout. To your wallet within minutes.

What's the difference between match odds and outright odds?

Match odds cover a single game ("Bayern beats BVB"). Outright odds are long-term aggregates ("Bayern wins the league"). Outright markets have deeper liquidity; match markets have faster resolution.

Can I import form data and lineups?

This page shows the live Polymarket quote as an implied probability. Form data and lineups must be researched separately via sports data providers (e.g. Soccerway, ESPN, FBref) — we surface the market probability, not the sport analysis.