De Los Santos, Yerry
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 | 3.81 |
| ERA current pace | 1.69 |
| ERA rolling p50 | 3.54 |
| Observed weight | 13% |
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 |
|---|---|---|---|---|
| SI | 66.3% | 65 | 108 | limited sample |
| CH | 24.5% | 24 | 105 | limited sample |
| SL | 5.1% | 5 | 98 | limited sample |
| FB | 4.1% | 4 | 83 | 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 | 32.9 | -- | -- |
| Batters Faced | 145 | -- | -- |
| K% | 20.1% | 12.6% to 27.6% | +/- 7.5% |
| BB% | 10.4% | 6.9% to 14.7% | +/- 3.9% |
| Whiff% | 21.4% | 17.3% to 28.1% | +/- 5.4% |
| HR/9 | 1.08 | 0.00 to 1.39 | +/- 0.70 |
| xwOBA Against | 0.316 | 0.245 to 0.360 | +/- 0.057 |
| Barrel% Allowed | 6.9% | 2.7% to 10.1% | +/- 3.7% |
| ERA | 3.82 | 1.47 to 5.78 | +/- 2.15 |
| FIP | 4.22 | 2.25 to 6.15 | +/- 1.95 |
| WHIP | 1.320 | 1.047 to 1.766 | +/- 0.360 |
184 career BF
| xwOBA | 0.271 |
| K% | 15.3% |
| BB% | 10.7% |
| Barrel | 4.8% |
255 career BF
| xwOBA | 0.252 |
| K% | 16.9% |
| BB% | 8.5% |
| Barrel | 4.8% |