Matsui, Yuki
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 | 4.02 |
| ERA current pace | 0.00 |
| ERA rolling p50 | 3.24 |
| Observed weight | 19% |
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 | 56.3% | 80 | 103 | limited sample |
| SL | 39.4% | 56 | 99 | limited sample |
| SI | 4.2% | 6 | 90 | 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 | 39.8 | -- | -- |
| Batters Faced | 169 | -- | -- |
| K% | 23.5% | 19.0% to 32.7% | +/- 6.8% |
| BB% | 10.7% | 6.7% to 15.6% | +/- 4.5% |
| Whiff% | 27.2% | 21.9% to 34.3% | +/- 6.2% |
| HR/9 | 1.23 | 0.59 to 2.22 | +/- 0.81 |
| xwOBA Against | 0.314 | 0.247 to 0.363 | +/- 0.058 |
| Barrel% Allowed | 7.8% | 3.6% to 11.8% | +/- 4.1% |
| ERA | 4.07 | 2.23 to 6.29 | +/- 2.03 |
| FIP | 4.19 | 2.50 to 5.22 | +/- 1.36 |
| WHIP | 1.332 | 0.986 to 1.682 | +/- 0.348 |
221 career BF
| xwOBA | 0.270 |
| K% | 24.4% |
| BB% | 10.3% |
| Barrel | 7.7% |
331 career BF
| xwOBA | 0.282 |
| K% | 22.0% |
| BB% | 11.1% |
| Barrel | 7.5% |