Roster player dossier · Almanac edition
St. Louis Cardinals · bats R
Riley O'Brien.
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.
Sinker
98.0
avg mph
Slider
91.1
avg mph
Change
90.9
avg mph
Sweeper
83.3
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 · 5 seasons
MLB regular season
| Season | Tm | G | GS | IP | ERA | WHIP | K/9 | BB/9 |
|---|---|---|---|---|---|---|---|---|
| 2026 | STL | 48 | 0 | 47.2 | 3.21 | 1.15 | 9.06 | 3.78 |
| 2025 | STL | 42 |
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 |
|---|---|---|---|---|---|---|---|
| 8/9 | vs COL | 1.0 | 0 | 0 | 0 | 0 | 0 |
| 8/7 | vs COL | 1.0 | 0 | 0 | 0 | 1 | 0 |
00.4 / Statcast card
Season percentile ranks vs. the qualified MLB pool · descriptive, not predictive.
Statcast season card · 2026 · Pitching
Elite strike-zone discipline.
Posterior percentiles vs. qualified MLB pool · Statcast window Apr 24 – Aug 7 · context only
Expected run prevention
xERA
38
4.39
Contact allowed
Barrel %
64
8.5%
Hard-Hit %
76
26.9%
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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