Riley O'Brien 2026 season stats

Riley O'Brien played 66 games for the St. Louis Cardinals in the 2026 MLB regular season, with 3 wins, a 4.08 ERA and 64 strikeouts.

All Riley O'Brien seasonsSt. Louis Cardinals

2026 regular season

GP
66
R
35
H
53
K
64
L
9
W
3
BB
29
ER
29
GS
0
IP
64.0
SV
38
W%
0.3

2026 splits

Totals, from the 66 regular-season games in the log.

Riley O'Brien, 2026 splits
GP: Games the player appeared in, however briefly.IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent.
All games6664.0533529296454.08
Home3636.0311614123123.50
Away3028.0221915173334.82
Wins5352.128108195011.38
Losses1311.22525211014416.20
March33.13000200.00
April1212.083211501.50
May1010.0108731016.30
June1010.09667715.40
July98.142271202.16
August1211.010775815.73
September109.199561024.82

What the columns mean: IP · H · R · BB · K · HR · ERA

By opponent

Riley O'Brien, 2026, by opponent
GP: Games the player appeared in, however briefly.IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.ERA: Earned runs allowed per nine innings pitched — lower is better. Under 3.00 is excellent.
vs ARI22.01001100.00
vs ATH22.00001200.00
vs ATL33.01001300.00
vs BAL22.03110104.50
vs BOS11.00000100.00
vs CHC55.01112301.80
vs CHW22.01221319.00
vs CIN65.24104800.00
vs CLE22.00000300.00
vs COL33.01001200.00
vs DET11.00000100.00
vs HOU22.01000300.00
vs KC22.03220119.00
vs LAA21.122234013.50
vs LAD32.165413015.43
vs MIA22.01000200.00
vs MIL21.21000100.00
vs MIN11.00113109.00
vs NYM22.01000200.00
vs NYY11.00001100.00
vs PHI21.256611132.40
vs PIT22.03221109.00
vs SD33.02221416.00
vs SEA11.042211018.00
vs SF33.04314213.00
vs TB22.13000200.00
vs TEX22.033322013.50
vs TOR11.01000100.00
vs WSH44.01200400.00

What the columns mean: IP · H · R · BB · K · HR · ERA

2026 games

Riley O'Brien, last 15 games, 2026 regular season
IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.
Sep 20, 2026vs WSHW 5-31.0000000
Sep 19, 2026vs WSHL 8-5 F/111.0110020
Sep 16, 2026vs SFL 6-5 F/101.0221101
Sep 14, 2026vs SFW 2-11.0100120
Sep 12, 2026vs CHWL 6-51.0122121
Sep 11, 2026vs CHWW 7-31.0000010
Sep 7, 2026@ SFL 5-4 F/111.0110200
Sep 4, 2026@ COLW 7-61.0100020
Sep 3, 2026@ LADL 3-20.1222100
Sep 2, 2026@ LADW 8-6 F/101.0010010
Aug 27, 2026vs BALW 7-51.0100010
Aug 26, 2026vs BALL 8-71.0211000
Aug 23, 2026@ PHIL 6-40.2566101
Aug 20, 2026@ CINW 10-90.1100200
Aug 18, 2026@ CINW 3-01.0000010

What the columns mean: IP · H · R · BB · K · HR

All 66 gamesOnly the last 15 games
Riley O'Brien, game by game, 2026 regular season
IP: Innings pitched. The decimal counts outs, so 6.2 is six innings and two more outs.H: Times the batter reached base by hitting the ball, without help from an error.R: Runs — scored by the batter, or allowed by the pitcher.ER: Earned runs allowed — runs that scored without help from an error.BB: Times the batter reached first base on four balls.K: Batters this pitcher struck out.HR: Home runs hit.
Sep 20, 2026vs WSHW 5-31.0000000
Sep 19, 2026vs WSHL 8-5 F/111.0110020
Sep 16, 2026vs SFL 6-5 F/101.0221101
Sep 14, 2026vs SFW 2-11.0100120
Sep 12, 2026vs CHWL 6-51.0122121
Sep 11, 2026vs CHWW 7-31.0000010
Sep 7, 2026@ SFL 5-4 F/111.0110200
Sep 4, 2026@ COLW 7-61.0100020
Sep 3, 2026@ LADL 3-20.1222100
Sep 2, 2026@ LADW 8-6 F/101.0010010
Aug 27, 2026vs BALW 7-51.0100010
Aug 26, 2026vs BALL 8-71.0211000
Aug 23, 2026@ PHIL 6-40.2566101
Aug 20, 2026@ CINW 10-90.1100200
Aug 18, 2026@ CINW 3-01.0000010
Aug 17, 2026@ CINW 2-11.0000030
Aug 15, 2026@ CHCW 8-41.0000000
Aug 11, 2026vs PHIW 2-01.0000010
Aug 9, 2026vs COLW 7-41.0000000
Aug 7, 2026vs COLW 3-21.0000100
Aug 5, 2026@ NYYW 3-11.0000110
Aug 2, 2026@ TORW 5-11.0100010
Jul 30, 2026vs CHCL 4-2 F/101.0000010
Jul 29, 2026vs CHCW 3-2 F/101.0000110
Jul 22, 2026@ LAAW 1-01.0000230
Jul 20, 2026@ LAAL 3-20.1222110
Jul 17, 2026@ ARIW 5-41.0100110
Jul 11, 2026vs ATLW 4-11.0000110
Jul 10, 2026vs ATLW 2-11.0000020
Jul 8, 2026vs MILW 5-11.0100010
Jul 4, 2026@ CHCW 3-01.0000110
Jun 30, 2026@ ATLW 5-31.0100000
Jun 28, 2026vs MIAW 2-11.0000010
Jun 22, 2026vs ARIW 3-21.0000000
Jun 21, 2026@ KCW 12-101.0222011
Jun 16, 2026vs SDW 3-21.0000100
Jun 13, 2026@ MINW 9-61.0011310
Jun 7, 2026vs CINW 5-31.0100010
Jun 6, 2026vs CINW 6-51.0200110
Jun 3, 2026vs TEXW 5-31.0000100
Jun 2, 2026vs TEXL 7-41.0333120
May 29, 2026vs CHCW 6-51.0111000
May 23, 2026@ CINL 7-6 F/111.1010120
May 19, 2026vs PITW 9-6 F/101.0222100
May 15, 2026vs KCW 5-4 F/111.0100000
May 14, 2026@ ATHW 5-41.0000020
May 12, 2026@ ATHW 6-41.0000100
May 10, 2026@ SDL 3-2 F/101.0222031
May 7, 2026@ SDW 2-11.0000010
May 4, 2026vs MILW 6-30.2000000
May 2, 2026vs LADW 3-21.0422020
Apr 29, 2026@ PITW 5-41.0100010
Apr 25, 2026vs SEAL 11-91.0422110
Apr 21, 2026@ MIAW 5-31.0100010
Apr 19, 2026@ HOUW 7-5 F/101.1100020
Apr 18, 2026@ HOUW 7-50.2000010
Apr 15, 2026vs CLEW 5-31.0000020
Apr 14, 2026vs CLEW 6-5 F/101.0000010
Apr 10, 2026vs BOSW 3-21.0000010
Apr 8, 2026@ WSHW 6-11.0000000
Apr 7, 2026@ WSHW 7-6 F/101.0010020
Apr 5, 2026@ DETW 5-31.0000010
Apr 1, 2026vs NYMW 2-1 F/111.0100020
Mar 31, 2026vs NYMW 3-01.0000000
Mar 28, 2026vs TBW 6-5 F/101.0200000
Mar 26, 2026vs TBW 9-71.1100020

What the columns mean: IP · H · R · BB · K · HR

Answered about Riley O'Brien in 2026

Source: ESPN public MLB data, 2026 season.