Breaking-ball driven starter profile
Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.
| ERA preseason | 4.39 |
| ERA current pace | 3.64 |
| ERA rolling p50 | 3.97 |
| Observed weight | 57% |
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 | 33.8% | 326 | 105 | qualified |
| SL | 25.7% | 248 | 106 | qualified |
| SI | 16.5% | 159 | 97 | limited sample |
| CH | 10.4% | 100 | 106 | limited sample |
| CB | 7.3% | 70 | 99 | limited sample |
| FC | 6.3% | 61 | 104 | limited sample |
Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.
| ERA Δ | -0.49 |
| K% Δ | -0.010 |
| Sample | 75.3 IP |
positive regression
| Metric | Point | Range | Half-width |
|---|---|---|---|
| Innings | 145.6 | -- | -- |
| Batters Faced | 625 | -- | -- |
| K% | 20.7% | 17.9% to 27.3% | +/- 4.7% |
| BB% | 6.7% | 5.0% to 9.0% | +/- 2.0% |
| Whiff% | 18.1% | 16.7% to 23.3% | +/- 3.3% |
| HR/9 | 1.31 | 0.89 to 1.99 | +/- 0.55 |
| xwOBA Against | 0.335 | 0.289 to 0.353 | +/- 0.032 |
| Barrel% Allowed | 8.4% | 6.0% to 11.1% | +/- 2.5% |
| ERA | 4.13 | 3.46 to 5.95 | +/- 1.25 |
| FIP | 3.97 | 3.20 to 4.59 | +/- 0.69 |
| WHIP | 1.268 | 1.098 to 1.531 | +/- 0.217 |
| xwOBA | 0.328 |
| K% | 20.2% |
| BB% | 7.2% |
| Barrel | 8.4% |
| xwOBA | 0.291 |
| K% | 20.5% |
| BB% | 5.6% |
| Barrel | 7.2% |
