Wolfram, Grant
Late-inning arm with usable miss-bat shape
Season percentile report
The headline weighs outcome stats (xwOBA, barrels); each bar averages its full strip group below. 100 = best in MLB.
percentile
Preseason / current pace / Bayesian update
Rolling bands shrink current-season signal toward the preseason prior until the sample earns more weight.
| ERA preseason | 3.92 |
| ERA current pace | 4.76 |
| ERA rolling p50 | 4.21 |
| Observed weight | 35% |
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
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 | 42.2% | 124 | 109 | limited sample |
| SL | 26.2% | 77 | 98 | limited sample |
| FB | 17.0% | 50 | 97 | limited sample |
| CB | 14.6% | 43 | 105 | limited sample |
Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.
Current-season signal
| ERA Δ | +1.06 |
| K% Δ | +0.038 |
| Sample | 29.0 IP |
Point projection and range
| Metric | Point | Range | Half-width |
|---|---|---|---|
| Innings | 33.4 | -- | -- |
| Batters Faced | 159 | -- | -- |
| K% | 22.7% | 15.3% to 29.3% | +/- 7.0% |
| BB% | 10.2% | 6.5% to 15.0% | +/- 4.3% |
| Whiff% | 23.4% | 18.6% to 29.7% | +/- 5.5% |
| HR/9 | 1.05 | 0.40 to 1.74 | +/- 0.67 |
| xwOBA Against | 0.293 | 0.252 to 0.355 | +/- 0.052 |
| Barrel% Allowed | 6.1% | 1.6% to 8.9% | +/- 3.6% |
| ERA | 3.70 | 1.96 to 6.86 | +/- 2.45 |
| FIP | 3.72 | 2.77 to 4.80 | +/- 1.02 |
| WHIP | 1.346 | 1.134 to 1.899 | +/- 0.382 |
61 career BF
| xwOBA | 0.226 |
| K% | 18.7% |
| BB% | 9.5% |
| Barrel | 2.5% |
82 career BF
| xwOBA | 0.247 |
| K% | 15.9% |
| BB% | 9.5% |
| Barrel | 3.2% |