Riley O'Brien
Cincinnati Reds 2021; Seattle Mariners 2022; St. Louis Cardinals 2024–2025
Percentile snapshot
No qualified season. This player never reached the qualification floor — 3.1 plate appearances, or one inning, per game his team played — in any archived season, so there is no season population to rank him inside.
Career, era-adjusted
sWAR measured against every career in history, 24,011 of them. Only era-adjusted career stats carry a percentile — a raw career total gets a rank instead, because pooling the 1890s with the 2020s is a choice, not a measurement.
Season by season
Batting
| Season | G | PA | AB | R | H | 2B | 3B | HR | RBI | BB | SO | SB | CS | BA | OBP | SLG | OPS | wRC+ | OPS+ | wOBA | sWAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | — | — | -0.1 |
| 2022 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | — | — | 0.1 |
| 2024 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | — | — | -0.6 |
| 2025 | 42 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | — | — | 1.6 |
| 2026 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | — | — | — | — | — | — | — | — |
Pitching
| Season | G | GS | W | L | SV | CG | SHO | H | ER | BB | SO | HR | IP | ERA | WHIP | K/9 | FIP | FIP- | ERA+ | sWAR |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2021 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 2 | 2 | 3 | 2 | 2 | 1.3 | 13.50 | 3.750 | 13.50 | 26.38 | 584.2 | 33.4 | -0.1 |
| 2022 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 1 | 0 | 1.0 | 0.00 | 2.000 | 9.00 | 4.05 | 109.0 | — | 0.1 |
| 2024 | 8 | 0 | 0 | 0 | 0 | 0 | 0 | 13 | 10 | 8 | 11 | 2 | 8.0 | 11.25 | 2.625 | 12.38 | 7.12 | 172.0 | 36.8 | -0.6 |
| 2025 | 42 | 0 | 3 | 1 | 6 | 0 | 0 | 33 | 11 | 22 | 45 | 2 | 48.0 | 2.06 | 1.146 | 8.44 | 3.70 | 91.8 | 195.4 | 1.6 |
| 2026 | 64 | 0 | 3 | 9 | 37 | 0 | 0 | 52 | 29 | 29 | 62 | 5 | 62.0 | 4.21 | 1.306 | 9.00 | — | — | — | — |
sWAR is the season TOTAL for a player who both hit and pitched: the record book carries one figure per season, not a split, so the same number appears on both lines rather than being counted twice.
Greyed rows are the current season, sourced from our own game log rather than the archived record book: wRC+, OPS+, wOBA, FIP and sWAR land when the season is archived, and are never approximated before then.
Career totals
Batting
Pitching
Totals run through the last archived season (2025), so the current season in the table above is not in them yet. A total is called out only where it ranks in the all-time top 500; hover a figure for its rank and the size of the field it was ranked in. Ranks are absolute facts and carry no percentile — the population for "career home runs" would be an editorial choice, and the rank is not.
Best games
Batting
Pitching
| Date | Game | IP | H | R | ER | BB | SO | HR |
|---|---|---|---|---|---|---|---|---|
| 2025-07-11 | ATL @ STL Gameday | 2.0 | 2 | 0 | 0 | 1 | 4 | 0 |
| 2024-09-14 | STL @ TOR Gameday | 2.0 | 4 | 2 | 2 | 1 | 3 | 0 |
| 2025-07-06 | STL @ CHC Gameday | 2.0 | 2 | 0 | 0 | 0 | 3 | 0 |
| 2024-08-30 | STL @ NYY Gameday | 1.0 | 2 | 2 | 2 | 0 | 3 | 1 |
| 2025-06-29 | STL @ CLE Gameday | 1.0 | 0 | 0 | 0 | 2 | 3 | 0 |
Ranked from our own play-by-play game log, which begins in 1901 — not from the record book, so a career played outside it shows nothing here rather than a short list.