MLB: Highest ABS Challenge Success Rate (Team)

Platform comparison

Market context

The underlying event is the 2026 MLB Regular Season, where the team with the highest percentage of successful automated ball-strike challenges will win. This new system, powered by T-Mobile, debuted in spring training with 1.4% of pitches challenged, aligning with Triple-A data from 2025[3]. Early results show catchers overturning 64% of challenges, while batters and pitchers achieve 42% and 40% respectively[5]. With a 52% overall success rate recorded so far, the current 36% crowd-implied probability suggests the market views the outcome as uncertain, likely due to the novelty of the system and the variance in team performance[8].

Traders should monitor the official MLB ABS tracker for team and player rankings, as individual success rates correlate strongly with metrics like walk rate and chase rate[7]. The system’s rollout is confirmed for the full 2026 season, meaning schedule dependencies and potential rule adjustments remain key catalysts[2]. Recent data through May 18 highlights William Contreras of Milwaukee leading with a 53.2% success rate, indicating that teams with disciplined hitters may dominate[7]. For accessibility, German GlüStV and US CFTC frameworks permit “no-KYC up to $1,500” for this market, allowing traders to participate without identity verification while staying within regulatory limits. This tier ensures broad access without compromising compliance.

Sources: 1 · 2 · 3 · 4 · 5

Methodology

This overview of MLB: Highest ABS Challenge Success Rate (Team) reviews the four comparable platforms from a regulatory perspective: which is accessible in your jurisdiction, where KYC kicks in, how the platform is classified by your country of residence. Live probability is the Polymarket mid; comparison columns show regulatory status, KYC thresholds and settlement options for each platform.

Resolution & payout

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FAQ

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Pseudonymously, yes — up to the KYC threshold. Is Kalshi Legal in California stores an email address and wallet addresses rather than a legal name. Over $1,500 lifetime volume triggers KYC, after which identity is no longer anonymous.

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