Riley O'Brien
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A player page shows one box score, because a hitter and a pitcher share almost no column — which half you get follows the one he appears in. Every rate is built from summed counts, so a batting average is hits over at bats across whatever window you picked rather than an average of nightly averages. Pitchers rank against starters or relievers, which is the split the sport itself draws. A dash means no number for that cell, or a zero in a roster column that counts.
Riley O'Brien
Pitcher2026 · Regular Season
Worth knowingRiley O'Brien is 282nd of 287 relief pitchers in losses, at 9.
94th beats 94% of the Relief Pitchers; 1 is the best of however many the row says. Higher is always better, whichever way the stat runs. Red to green by where the placing sits. A stat with no better end is left unpainted.
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Game log66 games
| Date | Opp | IP | W | L | SV | H | HR | K | BB | ERA | WHIP |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Sep 20, 2026 |  WSH | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| Sep 19, 2026 | WSH | 1 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 1.00 |
| Sep 16, 2026 |  SF | 1 | 0 | 1 | 0 | 2 | 1 | 0 | 1 | 9.00 | 3.00 |
| Sep 14, 2026 | SF | 1 | 0 | 0 | 1 | 1 | 0 | 2 | 1 | 0.00 | 2.00 |
| Sep 12, 2026 |  CWS | 1 | 0 | 1 | 0 | 1 | 1 | 2 | 1 | 18.00 | 2.00 |
| Sep 11, 2026 | CWS | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| Sep 7, 2026 | @SF | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 2 | 0.00 | 3.00 |
| Sep 4, 2026 | @ COL | 1 | 0 | 0 | 1 | 1 | 0 | 2 | 0 | 0.00 | 1.00 |
| Sep 3, 2026 | @ LAD | 0.1 | 0 | 1 | 0 | 2 | 0 | 0 | 1 | 54.00 | 9.00 |
| Sep 2, 2026 | @LAD | 0 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | — | — |
| Aug 27, 2026 |  BAL | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0.00 | 1.00 |
| Aug 26, 2026 | BAL | 1 | 0 | 1 | 0 | 2 | 0 | 0 | 0 | 9.00 | 2.00 |
| Aug 23, 2026 | @ PHI | 0.2 | 0 | 1 | 0 | 5 | 1 | 0 | 1 | 81.00 | 9.00 |
| Aug 20, 2026 | @ CIN | 0.1 | 0 | 0 | 1 | 1 | 0 | 0 | 2 | 0.00 | 9.00 |
| Aug 18, 2026 | @CIN | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| Aug 17, 2026 | @CIN | 1 | 0 | 0 | 1 | 0 | 0 | 3 | 0 | 0.00 | 0.00 |
| Aug 15, 2026 | @ CHC | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| Aug 11, 2026 | PHI | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| Aug 9, 2026 | COL | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| Aug 7, 2026 | COL | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.00 | 1.00 |
| Aug 5, 2026 | @ NYY | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0.00 | 1.00 |
| Aug 2, 2026 | @ TOR | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 1.00 |
| July 30, 2026 | CHC | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| July 29, 2026 | CHC | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0.00 | 1.00 |
| July 22, 2026 | @ LAA | 1 | 0 | 0 | 1 | 0 | 0 | 3 | 2 | 0.00 | 2.00 |
| July 20, 2026 | @LAA | 0.1 | 0 | 1 | 0 | 2 | 0 | 1 | 1 | 54.00 | 9.00 |
| July 17, 2026 | @ ARI | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 1 | 0.00 | 2.00 |
| July 11, 2026 |  ATL | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0.00 | 1.00 |
| July 10, 2026 | ATL | 1 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0.00 | 0.00 |
| July 8, 2026 |  MIL | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0.00 | 1.00 |
| July 4, 2026 | @CHC | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0.00 | 1.00 |
| June 30, 2026 | @ATL | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0.00 | 1.00 |
| June 28, 2026 |  MIA | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| June 22, 2026 | ARI | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| June 21, 2026 | @ KC | 0.2 | 0 | 0 | 0 | 2 | 1 | 1 | 0 | 27.00 | 3.00 |
| June 16, 2026 |  SD | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.00 | 1.00 |
| June 13, 2026 | @ MIN | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 3 | 9.00 | 3.00 |
| June 7, 2026 | CIN | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0.00 | 1.00 |
| June 6, 2026 | CIN | 1 | 0 | 0 | 1 | 2 | 0 | 1 | 1 | 0.00 | 3.00 |
| June 3, 2026 |  TEX | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.00 | 1.00 |
| June 2, 2026 | TEX | 1 | 0 | 1 | 0 | 3 | 0 | 2 | 1 | 27.00 | 4.00 |
| May 29, 2026 | CHC | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 9.00 | 1.00 |
| May 23, 2026 | @CIN | 1.1 | 0 | 1 | 0 | 0 | 0 | 2 | 1 | 0.00 | 0.75 |
| May 19, 2026 |  PIT | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 1 | 18.00 | 3.00 |
| May 15, 2026 | KC | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0.00 | 1.00 |
| May 14, 2026 | @ ATH | 1 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0.00 | 0.00 |
| May 12, 2026 | @ATH | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0.00 | 1.00 |
| May 10, 2026 | @SD | 1 | 0 | 0 | 0 | 2 | 1 | 3 | 0 | 18.00 | 2.00 |
| May 7, 2026 | @SD | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| May 4, 2026 | MIL | 0.2 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| May 2, 2026 | LAD | 1 | 0 | 0 | 1 | 4 | 0 | 2 | 0 | 18.00 | 4.00 |
| April 29, 2026 | @PIT | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0.00 | 1.00 |
| April 25, 2026 |  SEA | 1 | 0 | 1 | 0 | 4 | 0 | 1 | 1 | 18.00 | 5.00 |
| April 21, 2026 | @MIA | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0.00 | 1.00 |
| April 19, 2026 | @ HOU | 1.1 | 1 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 0.75 |
| April 18, 2026 | @HOU | 0.2 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 15, 2026 |  CLE | 1 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0.00 | 0.00 |
| April 14, 2026 | CLE | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 10, 2026 |  BOS | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 8, 2026 | @WSH | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| April 7, 2026 | @WSH | 1 | 0 | 0 | 1 | 0 | 0 | 2 | 0 | 0.00 | 0.00 |
| April 5, 2026 | @ DET | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0.00 | 0.00 |
| April 1, 2026 |  NYM | 1 | 0 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 1.00 |
| March 31, 2026 | NYM | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0.00 | 0.00 |
| March 28, 2026 |  TB | 1 | 0 | 0 | 0 | 2 | 0 | 0 | 0 | 0.00 | 2.00 |
| March 26, 2026 | TB | 1.1 | 1 | 0 | 0 | 1 | 0 | 2 | 0 | 0.00 | 0.75 |
| Season | G | GS | IP | W | L | SV | ERA | WHIP | H | HR | K | BB |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026 | 66 | 0 | 62.2 | 3 | 9 | 38 | 4.16 | 1.31 | 53 | 5 | 64 | 29 |
| 2025 | 42 | 0 | 48 | 3 | 1 | 6 | 2.06 | 1.15 | 33 | 2 | 45 | 22 |
| 2024 | 8 | 0 | 8 | 0 | 0 | 0 | 11.25 | 2.63 | 13 | 2 | 11 | 8 |
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