Jonah Heim
CATH · AL · Age 31 · Bats S / Throws R · 194 PA
Most likely driver: plate-discipline erosion — expanding the zone (32% confidence).
Edge breakdown
No single trait dominates — a league-typical swing shape.
The swing
Percentiles vs all tracked hitters. Attack angle/direction and tilt are swing-weighted averages across batting sides. Swing type from editable rules — first match wins.
vs pitch types
| Pitch | PA | wOBA | xwOBA | lg xwOBA | Whiff% | K% | RV/100 |
|---|---|---|---|---|---|---|---|
| 4-Seam Fastball | 68 | .342 | .300 | .327 | 24.8lg 22.0 | 26.5 | -0.1 |
| Changeup | 31 | .279 | .210 | .278 | 22.6lg 31.5 | 19.4 | 2.1 |
| Sinker | 18 | .469 | .453 | .351 | 12.5lg 13.7 | 11.1 | 1.9 |
| Slider | 22 | .161 | .203 | .288 | 34.9lg 33.5 | 27.3 | -3.0 |
| Cutter | 15 | .227 | .285 | .351 | 19.4lg 22.5 | 13.3 | -3.7 |
| Sweeper | 14 | .307 | .245 | .263 | 13.0lg 31.0 | 7.1 | 0.1 |
| Curveball | 11 | .377 | .371 | .281 | 20.0lg 30.8 | 9.1 | 1.4 |
| Splitter | 14 | .414 | .363 | .263 | 23.5lg 32.4 | 14.3 | 2.0 |
xwOBA green/red when 20+ points above/below league vs that pitch. RV/100 = run value per 100 pitches seen (positive favors the hitter). Source: Savant pitch arsenal stats.
Timing spectrum
share of competitive swings by timing
on-time 64.0% (+0.0% vs prior) · late 15.8% (+0.0% vs prior)
Barrel accuracy
avg miss from the sweet spot · dashed ring = league
2 pctl (lower is better) · +0.0" vs prior
What this can't see: Joint kinetics, hip-shoulder separation, and kinematic sequencing (Hawkeye/KinaTrax, team-internal — never estimated here). Stance angle and foot separation (Savant visuals only, no export). Release extension (column exported empty; needs pitch-level ingest).