Peralta, Sammy
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 | 4.84 |
| ERA current pace | 27.00 |
| ERA rolling p50 | 5.81 |
| Observed weight | 4% |
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
2025 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 |
|---|---|---|---|---|
| SL | 43.5% | 10 | 106 | limited sample |
| SI | 39.1% | 9 | 98 | limited sample |
| CH | 13.0% | 3 | 25 | limited sample |
| FB | 4.3% | 1 | 149 | 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 | 30.9 | -- | -- |
| Batters Faced | 146 | -- | -- |
| K% | 18.7% | 11.3% to 24.6% | +/- 6.7% |
| BB% | 8.9% | 4.5% to 14.4% | +/- 4.9% |
| Whiff% | 20.2% | 14.0% to 26.5% | +/- 6.3% |
| HR/9 | 1.09 | 0.21 to 2.26 | +/- 1.03 |
| xwOBA Against | 0.338 | 0.255 to 0.402 | +/- 0.074 |
| Barrel% Allowed | 6.7% | 3.3% to 11.2% | +/- 3.9% |
| ERA | 4.36 | 1.99 to 7.50 | +/- 2.75 |
| FIP | 4.07 | 2.27 to 7.18 | +/- 2.46 |
| WHIP | 1.453 | 1.194 to 1.963 | +/- 0.384 |
86 career BF
| xwOBA | 0.250 |
| K% | 14.1% |
| BB% | 8.3% |
| Barrel | 4.5% |
135 career BF
| xwOBA | 0.280 |
| K% | 12.1% |
| BB% | 8.6% |
| Barrel | 6.0% |