Odds, predictions, standings, and expert analysis for every MLB game
Riley O'Brien
Throws R · 2026 player profile
Quality of contact allowed
10-game rolling xwOBA
2026-03-26 — 2026-09-20 · 66 recorded dates. Lower xwOBA means less expected production allowed.
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Our picks on O'Brien
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Pick record checked Oct 13, 2026 ET. Local preview uses saved data.
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Original reasoning and recorded results.
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Inside the repertoire
What he throws, how it moves, and when he uses it.
The arsenal
| Pitch | Usage | Velo | Whiff% | xwOBA | EV | HMov | VMov | Spin |
|---|---|---|---|---|---|---|---|---|
| SinkerSI | 58% | 97.7 | 17.0% | 0.372 | 87.5 | -16.1 | 4.7 | 2197 |
| SweeperSW | 33% | 82.9 | 47.2% | 0.257 | 84.4 | 14.6 | -4.4 | 2318 |
| SliderSL | 8% | 90.6 | 21.4% | 0.361 | 92.3 | 2.2 | 3.7 | 2445 |
| ChangeupCH | 1% | 90.9 | 50.0% | 0.702 | — | -15.7 | 4.0 | 1906 |
Contact allowed by location
Heatmap · exit velocity in mph · catcher’s view. Choose a pitch type above to filter measured contact.
Data detail
Season & career
Updated 2026-10-13. Seasons are split by team. Innings use baseball notation: .1 is one out, .2 is two outs.
| Season / team | G | GS | IP | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|
| 2026 · St. Louis Cardinals | 66 | 0 | 64.0 | 64 | 29 | 4.08 | 1.28 |
| 2025 · St. Louis Cardinals | 42 | 0 | 48.0 | 45 | 22 | 2.06 | 1.15 |
| 2024 · St. Louis Cardinals | 8 | 0 | 8.0 | 11 | 8 | 11.25 | 2.63 |
| 2022 · Seattle Mariners | 1 | 0 | 1.0 | 1 | 1 | 0.00 | 2.00 |
| 2021 · Cincinnati Reds | 1 | 1 | 1.1 | 2 | 3 | 13.50 | 3.75 |
| Career | 118 | 1 | 122.1 | 123 | 63 | 3.83 | 1.35 |
Recorded game dates 66 dates
Existing chart-builder observations, grouped by date. Not an official box-score game log; missing values stay blank.
| Date | PA* | xwOBA | BA | EV (mph) | Barrel fraction |
|---|---|---|---|---|---|
| 2026-09-20 | 3 | 0.449 | 0.000 | 90.7 | 0.333 |
| 2026-09-19 | 4 | 0.115 | 0.250 | 89.6 | 0.000 |
| 2026-09-16 | 5 | 0.674 | 0.500 | 98.1 | 0.250 |
| 2026-09-14 | 5 | 0.275 | 0.250 | 91.4 | 0.000 |
| 2026-09-12 | 5 | 0.263 | 0.250 | 80.9 | 0.000 |
| 2026-09-11 | 3 | 0.028 | 0.000 | 82.8 | 0.000 |
| 2026-09-07 | 2 | 0.577 | 0.250 | 50.3 | 0.000 |
| 2026-09-04 | 4 | 0.297 | 0.250 | 83.1 | 0.000 |
| 2026-09-03 | 4 | 0.795 | 0.667 | 103.1 | 0.333 |
| 2026-09-02 | 3 | 0.313 | 0.000 | 90.1 | 0.000 |
*PA is the count of appearances with a positive wOBA denominator.
How to read these numbers
Sample: 276 pa
Compared with 2026 pitchers with a recorded value and at least 50 batters faced.
Sample: 173 bip
Compared with 2026 pitchers with a recorded value and at least 30 batted balls.
Sample: 168 bip
Compared with 2026 pitchers with a recorded value and at least 30 batted balls.
Sample: 168 bip
Compared with 2026 pitchers with a recorded value and at least 50 batters faced.
