Alejandro Kirk
111 PA · sample confidence ×0.53 · full player page
1 · What changed (2026 vs 2025)
Moving against him
xSLG−.176
xwOBA−.090
Hard-hit rate−13.2%
Avg exit velocity−4.3 mph
Max exit velocity−6.2 mph
AVG−.078
Barrel rate−7.7%
SLG−.115
xBA−.055
wOBA−.072
Fast-swing rate−16.3%
Sweet-spot rate−9.7%
Bat speed−1.7 mph
In his favor / neutral
Fly-ball rate−4.2%
Ground-ball rate+4.0%
Swing rate−3.7%
2 · Why — ranked hypotheses
1. Genuine bat-speed decline (strength, health, or age)
32%Causal path: Strength / conditioning → Bat speed → Contact quality → Expected outcomes
- • Bat speed −1.7 mph vs last season
- • Avg exit velocity −4.3 mph vs last season
- • Max exit velocity −6.2 mph vs last season
- • Hard-hit rate −13.2% vs last season
- • Fast-swing rate −16.3% vs last season
Cannot distinguish strength loss from sub-clinical injury with public data — flag for training staff, do not self-diagnose.
Unexplained / unobserved causes: 68% — confidence is deliberately capped; public data cannot see every layer.
3 · What the coach does tomorrow
Flag to strength and training staff for workload/strength review
Public data cannot separate strength loss, fatigue, or sub-clinical injury — that determination belongs to staff with medical context.
Track bat speed weekly against this baseline
Establishes whether the decline is a trend or a blip before intervening.
Video review, current vs last season, synced at contact
Compare side views at contact point. Public data flags the fingerprint; video confirms or rejects the mechanical story before anything is changed.
Actions follow the top hypothesis; if video review rejects it, fall to the next.
Data gaps
- • Biomechanics (Hawkeye), TrackMan, and Blast Motion are team-internal — the mechanics layer is inferred from its downstream fingerprint, never observed.