Breaking-ball driven starter profile
Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.
| ERA preseason | 4.17 |
| ERA current pace | 5.81 |
| ERA rolling p50 | 4.83 |
| Observed weight | 40% |
100th = best in MLB.
Stuff+ appears when the current pitch-event scoring artifact includes this pitcher; Arsenal Decomposition remains descriptive support under Stuff+.
Pitch-shape context from this pitcher’s current arsenal snapshot. Hover a pitch to inspect usage, movement, and bat-missing context.
Live snapshot series; true 50/100 PA windows require PA-level logs
Aggregate zone metrics from seasonal Statcast leaderboards.
2026 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 | 43.8% | 177 | 104 | limited sample |
| SL | 29.7% | 120 | 112 | limited sample |
| FC | 15.3% | 62 | 102 | limited sample |
| CB | 11.1% | 45 | 102 | limited sample |
Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.
| ERA Δ | +1.74 |
| K% Δ | -0.014 |
| Sample | 35.3 IP |
positive regression
| Metric | Point | Range | Half-width |
|---|---|---|---|
| Innings | 145.3 | -- | -- |
| Batters Faced | 627 | -- | -- |
| K% | 23.1% | 19.8% to 29.5% | +/- 4.8% |
| BB% | 7.6% | 5.6% to 9.9% | +/- 2.2% |
| Whiff% | 23.8% | 20.1% to 28.1% | +/- 4.0% |
| HR/9 | 1.42 | 0.81 to 2.05 | +/- 0.62 |
| xwOBA Against | 0.314 | 0.283 to 0.349 | +/- 0.033 |
| Barrel% Allowed | 8.8% | 6.9% to 12.5% | +/- 2.8% |
| ERA | 4.07 | 3.02 to 5.76 | +/- 1.37 |
| FIP | 4.08 | 3.24 to 5.61 | +/- 1.18 |
| WHIP | 1.313 | 1.104 to 1.612 | +/- 0.254 |
| xwOBA | 0.286 |
| K% | 24.5% |
| BB% | 6.7% |
| Barrel | 7.4% |
| xwOBA | 0.310 |
| K% | 22.2% |
| BB% | 7.5% |
| Barrel | 9.8% |
