10% — Will Brent Rooker lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season Kalshi 10% · 19 contracts · $277 volume · medium confidence Updated 2026-08-11 02:48:30 UTC Why this matters: This market estimates a 9% chance that Brent Rooker finishes the 2026 MLB season with the highest OPS (On-base Plus Slugging), a comprehensive hitting metric combining batting average and power. The probability reflects Rooker competing against established elite hitters like James Wood (23%), Seiya Suzuki (24%), and Yordan Alvarez (20%), who command significantly higher odds. Rooker's relatively low probability suggests market participants view him as less likely to lead baseball in combined offensive production than these peers. The outcome will be determined once the 2026 regular season concludes in late September, when final statistics are compiled. Key variables include Rooker's sustained performance level throughout a full season, health status, lineup context, and whether he can maintain or improve upon recent production rates while competitors maintain or decline from their benchmarks. Key factors: - Rooker's career-high OPS trajectory compared to Wood, Suzuki, and Alvarez's established elite-hitting baselines - Trading volume of $0-32 across competing contracts suggests modest market confidence in any single favorite, indicating genuine uncertainty - Rooker's opportunity for playing time and plate appearances relative to injured or underperforming periods during the 162-game season - Year-to-date 2026 performance through mid-July as a leading indicator of full-season trajectory and whether early trends will sustain - Head-to-head statistical gap between Rooker and the current frontrunners (Wood at 23%) requiring significant relative outperformance or regression from competitors Contracts: - Will Yordan Alvarez lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Yordan Alvarez — 89¢ Kalshi $277 (weight 100%) - Will Austin Riley lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Austin Riley — 4¢ Kalshi $0 (weight 0%) - Will Byron Buxton lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Byron Buxton — 4¢ Kalshi $0 (weight 0%) - Will Bryce Harper lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Bryce Harper — 4¢ Kalshi $0 (weight 0%) - Will Ben Rice lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Ben Rice — 29¢ Kalshi $0 (weight 0%) - Will Brent Rooker lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Brent Rooker — 4¢ Kalshi $0 (weight 0%) - Will Bobby Witt Jr. lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Bobby Witt Jr. — 6¢ Kalshi $0 (weight 0%) - Will Corbin Carroll lead Pro Baseball in OPS (On-base Plus Slugging) for the 2026 regular season?: Corbin Carroll — 4¢ Kalshi $0 (weight 0%) - ... and 11 more --- ## Methodology SimpleFunctions aggregates live YES-side prices from Kalshi and Polymarket contracts bound to this question. For binary topics the headline is the liquidity-weighted mid-price (weight = log(1 + 24h volume) × freshness, where freshness is 1.0 if updated <24h, 0.7 if <7d, 0.4 otherwise). For multi-outcome (winner-take-all) topics the headline is the current leader's price — disjoint outcomes are never arithmetically averaged. Snapshots refresh every 5 minutes during market hours. ## SF Signal - SF Index, regime, and 30d Brier calibration are computed separately and surfaced at https://simplefunctions.dev/admin/calibration. - No SimpleFunctions index / regime / calibration signal is bound to this topic yet — the headline above is market-derived only. --- *Last verified: 2026-08-11T02:20:51.773Z* By SimpleFunctions — https://simplefunctions.dev/ Cite as: "10% per prediction markets (SimpleFunctions, August 2026)" Canonical: https://simplefunctions.dev/answer/leadermlbops Full data: https://simplefunctions.dev/api/public/query?q=Will%20Brent%20Rooker%20lead%20Pro%20Baseball%20in%20OPS%20(On-base%20Plus%20Slugging)%20for%20the%202026%20regular%20season Provider: SimpleFunctions — https://simplefunctions.dev