Roster player dossier · Almanac edition
Pittsburgh Pirates · bats R
Isaac Mattson.
Season production, recent form, handedness splits, and role context. Descriptive only—no live recommendation is shown here.
MLB.com profile ↗What matters now
PRO DECISION CONTEXT LOCKED
Public stats remain descriptive. Live probability, price, Action Window, and Decision state are available only after the Pro access check.
No valid movement comparison is available, so Posterior is not inferring one from a small or missing sample.
Completed performance and hot form remain supporting evidence; neither creates a Posterior Decision on its own.
00 / Public almanac
Season stats and recent form · descriptive, not predictive.
Savant and arsenal
Expected contact, splits, and pitch shape.
4-seam
94.1
avg mph
Slider
84.2
avg mph
Change
86.0
avg mph
Sweeper
82.9
avg mph
These MLB and Baseball Savant summaries describe completed performance windows. They are not a pending pick, model probability, edge, price, or betting instruction.
00.2 / Career lines
Season-by-season record · descriptive, not predictive.
Pitching · 4 seasons
MLB regular season
| Season | Tm | G | GS | IP | ERA | WHIP | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|
| 2026 | PIT | 36 | 0 | 34.2 | 4.93 | 1.56 | 8.57 | 4.15 |
| 2025 | PIT | 44 |
00.3 / Last 12
Current performance across roughly four series · descriptive, not predictive.
Pitching · last 12 games
| Date | Opp | IP | H | R | ER | BB | K |
|---|---|---|---|---|---|---|---|
| 7/28 | vs ARI | 1.2 | 3 | 1 | 1 | 1 | 3 |
| 7/25 | vs CHC | 0.1 | 4 | 3 | 3 | 1 | 1 |
00.4 / Statcast card
Season percentile ranks vs. the qualified MLB pool · descriptive, not predictive.
Statcast season card · 2026 · Pitching
Elite barrel contact with a poor run prevention.
Posterior percentiles vs. qualified MLB pool · Statcast window Apr 24 – Aug 7 · context only
Expected run prevention
xERA
4
6.23
Contact allowed
Barrel %
96
13.7%
Hard-Hit %
68
25.8%
Avg. Exit Velo
00.5 / Statcast form
Nightly Statcast trends · descriptive, not predictive.
Statcast form is still gathering a sufficient recent sample. No thin reads are shown.
01 / Pro decision context
Live prediction and price fields remain locked.
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