BIGLEAGUE

St. Louis Cardinals · Pitcher · #61

Riley O'Brien

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

ERA

3.93

W-L

3-5

K

53

WHIP

1.22

WAR

0.4

FIP

3.69

Awards

3 major honors

All-Star ×3

2018 · 2023 · 2026

League Percentile

2026 season · percentile vs 54 qualified pitchers
the entire league54relief pitchers290
ERA
31
3.93
WHIP
37
1.22
Strikeouts
0
53
K/9
60
9.06
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 69%

Riley O'Brien's ERA (3.93) ranks below average among 54 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 Season543.93353352.253231.22
Career1063.736739111.0112571.32

Hover over a stat for its definition.

ARSENAL

Pitch arsenal · 2026 usage and average velocity
Sinker60.3%avg 158 km/h
Sweeper31.1%avg 134 km/h
Slider7.6%avg 146 km/h
Changeup1.0%avg 146 km/h

ADVANCED

Advanced metrics · 2026 season

BABIP

.281

K/9

9.06

BB/9

3.93

HR/9

0.51

Quality starts

0

Whiff%

26.2%

GAME LOG

Last 10 games · includes team result
DateOppInningsHitsERWalksStrikeoutsTeam
08.23@ PHI0.25610L
08.20@ CIN0.11020W
08.18@ CIN1.00001W
08.17@ CIN1.00003W
08.15@ CHC1.00000W
08.11vs PHI1.00001W
08.09vs COL1.00000W
08.07vs COL1.00010W
08.05@ NYY1.00011W
08.02@ TOR1.01001W

SPLITS

Situational splits (2026)

Home

Opp AVG.225
IP28.0
K23
WHIP1.14

Away

Opp AVG.205
IP24.2
K30
WHIP1.30

vs LHP

Opp AVG.226
IP25.2
K21
WHIP1.36

vs RHP

Opp AVG.206
IP26.1
K32
WHIP1.10

RISP

Opp AVG.238
IP16.2
K18
WHIP1.50

YEAR BY YEAR

Year-by-year · Career trends

ERALower is better

▲ Trending down year over year
ERA by yearFrom 13.50 in 2021 to 3.93 in 2026. Lower is better for this stat.2021 ERA: 13.5013.5020212022 ERA: 0.000.0020222024 ERA: 11.2520242025 ERA: 2.0620252026 ERA: 3.933.932026
Show yearly figures
ERA year-by-year details
YearERA
202113.50
20220.00
202411.25
20252.06
20263.93

WHIPLower is better

▲ Trending down year over year
WHIP by yearFrom 3.75 in 2021 to 1.22 in 2026. Lower is better for this stat.2021 WHIP: 3.753.7520212022 WHIP: 2.0020222024 WHIP: 2.6320242025 WHIP: 1.151.1520252026 WHIP: 1.221.222026
Show yearly figures
WHIP year-by-year details
YearWHIP
20213.75
20222.00
20242.63
20251.15
20261.22

Strikeouts

▲ Trending up year over year
Strikeouts by yearFrom 2 in 2021 to 53 in 2026.2021 Strikeouts: 2220212022 Strikeouts: 1120222024 Strikeouts: 1120242025 Strikeouts: 4520252026 Strikeouts: 53532026
Show yearly figures
Strikeouts year-by-year details
YearStrikeouts
20212
20221
202411
202545
202653
YearTeamGamesERAWinsLossesSavesInningsStrikeoutsWalksWHIP
2021CIN113.500101.1233.75
2022SEA10.000001.0112.00
2024STL811.250008.01182.63
2025STL422.0631648.045221.15
2026STL543.93353352.253231.22