BIGLEAGUE

St. Louis Cardinals · Pitcher · #61

Riley O'Brien

Age 316' 4" · 180lbBats R · Throws RDebut 2021From Seattle

ERA

4.08

W-L

3-9

K

64

WHIP

1.28

WAR

0.3

FIP

3.94

Awards

1 major honor

All-Star

2026

League Percentile

2026 season · percentile vs 46 qualified pitchers
ERA
26
4.08
WHIP
25
1.28
Strikeouts
0
64
K/9
50
9.00
Wins
0
3
Bottom of leagueAverage (50)Top of league

⚠ Below the qualified innings threshold. Percentiles are for reference only.

the entire league · by ERA

Top 74%

Riley O'Brien's ERA (4.08) ranks below average among 46 qualified pitchers. The number on each bar is a percentile (higher is better); use the tabs to change the comparison pool.

PITCHING

Season · Career
CategoryGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2026 Season664.08393864.064291.28
Career1183.8361144122.1123631.35

Hover over a stat for its definition.

ARSENAL

Pitch arsenal · 2026 usage and average velocity
Sinker58.4%avg 157 km/h
Sweeper32.8%avg 133 km/h
Slider7.7%avg 146 km/h
Changeup1.1%avg 146 km/h

ADVANCED

Advanced metrics · 2026 season

BABIP

.291

K/9

9.00

BB/9

4.08

HR/9

0.70

Quality starts

0

Whiff%

26.8%

GAME LOG

Last 10 games · includes team result
DateOppInningsHitsERWalksStrikeoutsTeam
09.20vs WSH1.00000W
09.19vs WSH1.01002L
09.16vs SF1.02110L
09.14vs SF1.01012W
09.12vs CWS1.01212L
09.11vs CWS1.00001W
09.07@ SF1.01020L
09.04@ COL1.01002W
09.03@ LAD0.12210L
09.02@ LAD1.00001W

SPLITS

Situational splits (2026)

Home

Opp AVG.233
IP36.0
K31
WHIP1.19

Away

Opp AVG.220
IP28.0
K33
WHIP1.39

vs LHP

Opp AVG.244
IP33.0
K29
WHIP1.48

vs RHP

Opp AVG.209
IP30.1
K35
WHIP1.09

RISP

Opp AVG.253
IP22.0
K24
WHIP1.55

YEAR BY YEAR

Year-by-year · Career trends

ERALower is better

▲ Trending down year over year
ERA by yearFrom 13.50 in 2021 to 4.08 in 2026. Lower is better for this stat.2021 ERA: 13.5013.5020212022 ERA: 0.000.0020222024 ERA: 11.2520242025 ERA: 2.0620252026 ERA: 4.084.082026
Show yearly figures
ERA year-by-year details
YearERA
202113.50
20220.00
202411.25
20252.06
20264.08

WHIPLower is better

▲ Trending down year over year
WHIP by yearFrom 3.75 in 2021 to 1.28 in 2026. Lower is better for this stat.2021 WHIP: 3.753.7520212022 WHIP: 2.0020222024 WHIP: 2.6320242025 WHIP: 1.151.1520252026 WHIP: 1.281.282026
Show yearly figures
WHIP year-by-year details
YearWHIP
20213.75
20222.00
20242.63
20251.15
20261.28

Strikeouts

▲ Trending up year over year
Strikeouts by yearFrom 2 in 2021 to 64 in 2026.2021 Strikeouts: 2220212022 Strikeouts: 1120222024 Strikeouts: 1120242025 Strikeouts: 4520252026 Strikeouts: 64642026
Show yearly figures
Strikeouts year-by-year details
YearStrikeouts
20212
20221
202411
202545
202664
YearTeamGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2021CIN113.500101.1233.75
2022SEA10.000001.0112.00
2024STL811.250008.01182.63
2025STL422.0631648.045221.15
2026STL664.08393864.064291.28