Weaver, Luke
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 | 3.73 |
| ERA current pace | 3.04 |
| ERA rolling p50 | 3.51 |
| Observed weight | 32% |
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
Aggregate zone heatmap
Aggregate zone metrics from seasonal Statcast leaderboards.
Usage mix, movement map, and Stuff+ composition
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 | 51.1% | 182 | 112 | limited sample |
| CH | 35.1% | 125 | 104 | limited sample |
| FC | 13.8% | 49 | 95 | limited sample |
Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.
Current-season signal
| ERA Δ | -0.85 |
| K% Δ | -0.007 |
| Sample | 26.7 IP |
Point projection and range
| Metric | Point | Range | Half-width |
|---|---|---|---|
| Innings | 45.1 | -- | -- |
| Batters Faced | 188 | -- | -- |
| K% | 24.8% | 19.3% to 34.9% | +/- 7.8% |
| BB% | 8.0% | 5.0% to 11.9% | +/- 3.4% |
| Whiff% | 26.1% | 21.3% to 31.7% | +/- 5.2% |
| HR/9 | 1.36 | 0.65 to 2.41 | +/- 0.88 |
| xwOBA Against | 0.299 | 0.258 to 0.356 | +/- 0.049 |
| Barrel% Allowed | 8.1% | 5.1% to 12.7% | +/- 3.8% |
| ERA | 3.89 | 2.36 to 6.66 | +/- 2.15 |
| FIP | 4.03 | 2.74 to 5.45 | +/- 1.36 |
| WHIP | 1.193 | 0.952 to 1.564 | +/- 0.306 |
1618 career BF
| xwOBA | 0.286 |
| K% | 24.6% |
| BB% | 8.0% |
| Barrel | 8.0% |
1699 career BF
| xwOBA | 0.290 |
| K% | 24.7% |
| BB% | 6.8% |
| Barrel | 9.3% |