Taillon, Jameson
Run-prevention profile built on workable command
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 | 4.57 |
| ERA current pace | 5.65 |
| ERA rolling p50 | 5.25 |
| Observed weight | 63% |
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 |
|---|---|---|---|---|
| FB | 28.6% | 326 | 108 | qualified |
| FC | 20.1% | 229 | 102 | qualified |
| SL | 15.2% | 173 | 107 | limited sample |
| CH | 14.4% | 164 | 102 | limited sample |
| CB | 12.0% | 137 | 98 | limited sample |
| SI | 9.6% | 109 | 100 | limited sample |
Renamed from the attempted Kirby Index after audit; true Kirby requires release-angle trajectory data.
Current-season signal
| ERA Δ | +1.04 |
| K% Δ | +0.034 |
| Sample | 92.3 IP |
positive regression
Point projection and range
| Metric | Point | Range | Half-width |
|---|---|---|---|
| Innings | 142.3 | -- | -- |
| Batters Faced | 587 | -- | -- |
| K% | 17.1% | 15.2% to 24.2% | +/- 4.5% |
| BB% | 5.7% | 3.6% to 7.5% | +/- 1.9% |
| Whiff% | 17.3% | 15.6% to 22.6% | +/- 3.5% |
| HR/9 | 1.72 | 1.05 to 2.32 | +/- 0.64 |
| xwOBA Against | 0.348 | 0.286 to 0.361 | +/- 0.037 |
| Barrel% Allowed | 8.4% | 6.1% to 11.5% | +/- 2.7% |
| ERA | 4.61 | 3.05 to 5.88 | +/- 1.41 |
| FIP | 4.64 | 3.52 to 5.08 | +/- 0.78 |
| WHIP | 1.318 | 0.980 to 1.422 | +/- 0.221 |
2593 career BF
| xwOBA | 0.304 |
| K% | 17.6% |
| BB% | 5.8% |
| Barrel | 8.8% |
2708 career BF
| xwOBA | 0.283 |
| K% | 17.8% |
| BB% | 3.8% |
| Barrel | 7.5% |