Mithrandir Metrics
Diagnostic STL Refreshed Jun 1 06:00 AM ET
Optimization diagnostic / STL

Iván Herrera

Iván Herrera's tools (80) outpace production (69) by 11 points. Primary finding: elite raw contact quality undermined by swing decisions — the bat is dangerous when it connects.

Score
20
Tools
80
Gap
+10.9
Data window 2026-05-17 / 2026-05-31Confidence MEDIUM
Hitter optimization

Swing path and decision map

Iván Herrera's tools (80) outpace production (69) by 11 points. Primary finding: elite raw contact quality undermined by swing decisions — the bat is dangerous when it connects.

Chase Rate Problem
Hold Hold Hold Hold Attack Hold Hold Hold Hold

Pitch recognition training and two-strike approach adjustment

Protected takes / Chase risk
Contact-Discipline Mismatch
Hold Hold Hold Hold Attack Hold Hold Hold Hold

Shorten swing against breaking balls while maintaining bat speed on fastballs

Protected takes / Chase risk
Diagnosis

Fixable gaps

SignalCauseFixConfidence
Chase Rate Problem0.31Expanding the zone too aggressively — generating weak contact and whiffs on pitcher's pitchesPitch recognition training and two-strike approach adjustmentEach 3pp chase rate reduction projects to ~0.010 wOBA improvementMEDIUM
Contact-Discipline Mismatch0.65Elite raw contact quality undermined by swing decisions — the bat is dangerous when it connectsShorten swing against breaking balls while maintaining bat speed on fastballsMarginal discipline improvement with this power profile has huge upsideMEDIUM
Arsenal / metrics

Underlying components

ComponentUsageVeloWhiff
No component rows are available for this report.