Fernández, Julian
Run-prevention profile built on workable command
Preseason / current pace / Bayesian update
Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.
| ERA preseason | 3.98 |
| ERA current pace | 2.25 |
| ERA rolling p50 | 3.84 |
| Observed weight | 8% |
Actual percentile with projection tick
100th = best in MLB.
Stuff+ and arsenal context
Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; Arsenal Decomposition remains descriptive support under Stuff+.
Arsenal optimization map
Pitch-shape context from this pitcher’s current arsenal snapshot. Hover a pitch to inspect usage, movement, and bat-missing context.
xwOBA allowed snapshot line
Live snapshot series; true 50/100 PA windows require PA-level logs
No Live State xwOBA snapshots are available for this player.
Aggregate zone heatmap
Aggregate zone metrics from seasonal Statcast leaderboards.
Usage mix, movement map, and Stuff+ composition
2025 pitch-level arsenal aggregates; current season takes over after 100 tracked pitches across at least 2 pitch types. Descriptive pitch-type Stuff+ composition. Not a promoted predictive metric.
| Pitch | Usage | Pitches | Stuff+ | Status |
|---|---|---|---|---|
| FB | 59.2% | 42 | 96 | limited sample |
| CH | 40.8% | 29 | 85 | limited sample |
Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.
Current-season signal
No Live State delta is available for this player yet.
Point projection and range
| Metric | Point | Range | Half-width |
|---|---|---|---|
| Innings | 31.6 | -- | -- |
| Batters Faced | 131 | -- | -- |
| K% | 22.2% | 10.1% to 24.3% | +/- 7.1% |
| BB% | 8.4% | 2.2% to 12.0% | +/- 4.9% |
| Whiff% | 24.3% | 9.2% to 26.2% | +/- 8.5% |
| HR/9 | 1.37 | 0.23 to 3.07 | +/- 1.42 |
| xwOBA Against | 0.323 | 0.144 to 0.378 | +/- 0.117 |
| Barrel% Allowed | 7.7% | 3.4% to 11.1% | +/- 3.9% |
| ERA | 4.43 | 0.57 to 5.57 | +/- 2.50 |
| FIP | 3.96 | 2.11 to 5.47 | +/- 1.68 |
| WHIP | 1.184 | 0.314 to 1.467 | +/- 0.577 |
33 career BF
| xwOBA | 0.160 |
| K% | 9.6% |
| BB% | 3.9% |
| Barrel | 5.7% |
25 career BF
| xwOBA | 0.150 |
| K% | 10.3% |
| BB% | 3.0% |
| Barrel | 5.0% |