Riley O'Brien stats and game log
Riley O'Brien is the St. Louis Cardinals relief pitcher (No. 61). In the 2026 regular season through September 20, 2026, Riley O'Brien has played 66 games: 64.0 innings, 64 strikeouts and a 4.08 ERA.
Research summary
- Recent form: 1.2 strikeouts per game over the last 5 games, against 1 over the season (66 games).
- Role: 1.0 innings per game over the last 5 games, against 1.0 over the season.
- Consistency: at or above the season average (1 strikeouts) in 44 of 66 games.
- Home and road: 0.9 strikeouts per game at home (36 games), 1.1 on the road (30).
Figures are MLB regular-season games; samples are stated and small samples move quickly.
Team: St. Louis Cardinals stats and results.
6'4" · 180 lb
2026 regular season
| Games | IP | H | ER | BB | K | HR | PIT | |
|---|---|---|---|---|---|---|---|---|
| 2026 per game | 66 | 1.0 | 0.8 | 0.4 | 0.4 | 1 | 0.1 | 16.1 |
| 2026 totals | 66 | 64.0 | 53 | 29 | 29 | 64 | 5 | 1064 |
2025 regular season
42 regular-season games in 2025 for comparison. Playoff games are not in these figures.
| Games | IP | H | R | ER | BB | K | HR | HB | |
|---|---|---|---|---|---|---|---|---|---|
| 2025 per game | 42 | 1.0 | 0.8 | 0.3 | 0.3 | 0.5 | 1.1 | 0 | 0.2 |
| 2025 totals | 42 | 48.0 | 33 | 13 | 11 | 22 | 45 | 2 | 7 |
Rates in 2026
Riley O'Brien has pitched 64.0 innings in 66 games (0 starts) with 64 strikeouts and a 4.08 ERA.
| Measure | Value |
|---|---|
| ERA (earned runs per 9 innings) | 4.08 |
| WHIP (walks and hits per inning) | 1.28 |
| Strikeouts per 9 innings | 9.0 |
| Strikeout-to-walk ratio | 2.21 |
| Starts | 0 |
Home, road and recent form, 2026
| Split | Games | K/g | IP/g | ER/g |
|---|---|---|---|---|
| Home | 36 | 0.9 | 1.0 | 0.4 |
| Road | 30 | 1.1 | 1.0 | 0.5 |
| Last 5 games | 5 | 1.2 | 1.0 | 0.6 |
| Season | 66 | 1 | 1.0 | 0.4 |
Game log
| Date | Opponent | Result | IP | H | ER | BB | K | HR | PIT |
|---|---|---|---|---|---|---|---|---|---|
| Sep 20, 2026 | vs WSH | W | 1.0 | 0 | 0 | 0 | 0 | 0 | 6 |
| Sep 19, 2026 | vs WSH | L | 1.0 | 1 | 0 | 0 | 2 | 0 | 12 |
| Sep 16, 2026 | vs SF | L | 1.0 | 2 | 1 | 1 | 0 | 1 | 16 |
| Sep 14, 2026 | vs SF | W | 1.0 | 1 | 0 | 1 | 2 | 0 | 19 |
| Sep 12, 2026 | vs CHW | L | 1.0 | 1 | 2 | 1 | 2 | 1 | 21 |
| Sep 11, 2026 | vs CHW | W | 1.0 | 0 | 0 | 0 | 1 | 0 | 11 |
| Sep 7, 2026 | @ SF | L | 1.0 | 1 | 0 | 2 | 0 | 0 | 11 |
| Sep 4, 2026 | @ COL | W | 1.0 | 1 | 0 | 0 | 2 | 0 | 12 |
| Sep 3, 2026 | @ LAD | L | 0.1 | 2 | 2 | 1 | 0 | 0 | 17 |
| Sep 2, 2026 | @ LAD | W | 1.0 | 0 | 0 | 0 | 1 | 0 | 17 |
Cardinals teammates
- Alec Burleson (1B)
- Andre Pallante (SP)
- Blaze Jordan (3B)
- Bryan Torres (LF)
- Cade Winquest (RP)
- Caleb Ferguson (RP)
- Cesar Prieto (3B)
- Everson Pereira (RF)
- George Soriano (RP)
- Gordon Graceffo (RP)
- Hunter Dobbins (SP)
- Ivan Herrera (DH)
- Jimmy Crooks (C)
- JJ Wetherholt (2B)
- Jordan Walker (RF)
- Jose Fermin (LF)
- Joshua Baez (LF)
- Justin Bruihl (RP)
- Kyle Leahy (SP)
- Leo Bernal (C)
- Luis Gastelum (RP)
- Masyn Winn (SS)
- Matt Svanson (RP)
- Matthew Liberatore (SP)
- Michael McGreevy (SP)
- Nathan Church (CF)
- Nolan Gorman (3B)
- Pedro Pages (C)
- Ramon Urias (3B)
- Ryan Fernandez (RP)
- Ryne Stanek (RP)
- Thomas Saggese (SS)
- Victor Scott II (CF)
How to read these numbers
- Games are the games Riley O'Brien played.
- Season tables are regular-season games only. The game log includes playoff games, labeled, and reaches into last season when needed.
- A dash (–) means the statistic is not recorded for that game, never zero (hover it for the reason). A column with no recorded value is left out.
This page shows statistics and results only. It contains no sportsbook prices or betting lines. Current markets, hit rates against the line and StatsNext research are in the app.
Research in StatsNext
- Riley O'Brien in StatsNext: Player Research with splits, matchup context and current props
- St. Louis Cardinals stats and results
- Nationals at Cardinals, September 20, 2026
- Nationals at Cardinals, September 19, 2026
- Giants at Cardinals, September 16, 2026
- All MLB player stats, 2026