Stuart Fairchild
27 PA · sample confidence ×0.26 · full player page
1 · What changed (2026 vs 2025)
Moving against him
Whiff rate+38.3%
Zone contact−30.6%
xSLG−.203
xBA−.105
SLG−.175
AVG−.058
Chase rate+4.5%
In his favor / neutral
Opposite-field rate−30.6%
Strikeout rate+24.6%
Walk rate+18.6%
Ground-ball rate+21.1%
Swing rate−13.6%
Fly-ball rate−13.3%
wOBA+.041
xwOBA+.016
2 · Why — ranked hypotheses
1. Plate-discipline erosion — expanding the zone
12%Causal path: Swing decisions → Contact rate → Actual outcomes
- • Chase rate +4.5% vs last season
- • Strikeout rate +24.6% vs last season
Against / absent: Walk rate +18.6% vs last season · Zone contact −30.6% vs last season
Unexplained / unobserved causes: 88% — confidence is deliberately capped; public data cannot see every layer.
3 · What the coach does tomorrow
Pitch-recognition sessions (occluded video or spin-recognition reps)
Standard training for chase-rate problems; targets the decision, not the swing.
Controlled-take rounds in BP (swing only at middle-middle)
Classic zone-discipline reset; rebuilds the take muscle without mechanical interference.
Post-game zone chart review with the player
Show the chase locations from the data; awareness precedes adjustment.
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.
- • No bat-tracking rows this season (public minimum: 50 competitive swings).