Eflin, Zach
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 | 4.03 |
| ERA current pace | 2.46 |
| ERA rolling p50 | 3.83 |
| 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 |
|---|---|---|---|---|
| CH | 25.7% | 19 | 104 | limited sample |
| CB | 21.6% | 16 | 98 | limited sample |
| SI | 18.9% | 14 | 105 | limited sample |
| FC | 14.9% | 11 | 97 | limited sample |
| SL | 9.5% | 7 | 98 | limited sample |
| FB | 9.5% | 7 | 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 | 140.6 | -- | -- |
| Batters Faced | 594 | -- | -- |
| K% | 18.2% | 15.7% to 24.6% | +/- 4.4% |
| BB% | 4.6% | 2.6% to 6.3% | +/- 1.9% |
| Whiff% | 18.4% | 16.7% to 23.5% | +/- 3.4% |
| HR/9 | 1.52 | 0.94 to 2.14 | +/- 0.60 |
| xwOBA Against | 0.314 | 0.267 to 0.328 | +/- 0.030 |
| Barrel% Allowed | 8.5% | 5.6% to 11.0% | +/- 2.7% |
| ERA | 4.35 | 3.04 to 5.68 | +/- 1.32 |
| FIP | 4.40 | 3.01 to 5.11 | +/- 1.05 |
| WHIP | 1.277 | 1.039 to 1.541 | +/- 0.251 |
2314 career BF
| xwOBA | 0.285 |
| K% | 18.5% |
| BB% | 3.8% |
| Barrel | 8.4% |
2427 career BF
| xwOBA | 0.273 |
| K% | 20.0% |
| BB% | 3.4% |
| Barrel | 7.0% |