Yates, Kirby
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 | 4.04 |
| ERA current pace | 3.68 |
| ERA rolling p50 | 3.99 |
| Observed weight | 14% |
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
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 | 94.6% | 88 | 96 | limited sample |
| SL | 5.4% | 5 | 93 | 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 | 38.4 | -- | -- |
| Batters Faced | 160 | -- | -- |
| K% | 27.1% | 21.4% to 36.5% | +/- 7.5% |
| BB% | 10.5% | 6.4% to 15.1% | +/- 4.4% |
| Whiff% | 27.9% | 23.0% to 35.1% | +/- 6.0% |
| HR/9 | 1.26 | 0.61 to 2.41 | +/- 0.90 |
| xwOBA Against | 0.305 | 0.238 to 0.389 | +/- 0.075 |
| Barrel% Allowed | 9.0% | 4.7% to 15.2% | +/- 5.2% |
| ERA | 4.01 | 1.70 to 6.81 | +/- 2.56 |
| FIP | 4.09 | 2.00 to 5.46 | +/- 1.73 |
| WHIP | 1.254 | 0.929 to 1.673 | +/- 0.372 |
793 career BF
| xwOBA | 0.282 |
| K% | 27.4% |
| BB% | 12.1% |
| Barrel | 11.9% |
997 career BF
| xwOBA | 0.271 |
| K% | 29.2% |
| BB% | 9.0% |
| Barrel | 9.8% |