Major League Baseball
PLAYERS
Riley O'Brien
#55 - St. Louis Cardinals
Profile
Position Starter
Height 6'4"
Weight 180 lbs
Birthdate February 6, 1995
Birthplace Seattle, Washington
College Idaho
Bats Right
Throws Right
Key Statistics
IP 42.1
W/L 3-0
SV 4
ERA 2.13
K 40
BB 20
OBP .318
Errors 0
Last 10
Date vs Res Score IP H R ER K BB HR
9/14/25 @ MIL SV 3-2 1.0 0 0 0 2 1 0
9/13/25 @ MIL 8-9 0.0 2 3 3 0 0 0
9/10/25 @ SEA 2-4 2.0 2 1 0 2 2 0
9/7/25 SF SV 4-3 1.0 1 0 0 0 0 0
9/6/25 SF W 3-2 1.0 0 0 0 1 0 0
8/28/25 PIT H 4-1 1.0 0 0 0 0 0 0
8/25/25 PIT W, BS 7-6 1.2 1 1 1 1 0 0
8/19/25 @ MIA SV 7-4 1.0 0 0 0 2 2 0
8/17/25 NYY BS 4-8 1.2 1 0 0 2 0 0
8/13/25 COL H 5-6 1.0 2 0 0 0 0 0
Pitching Statistics
Year Team W L ERA IP H R ER BB K HR
2021 CIN 0 1 13.50 1.1 2 2 2 3 2 2
2022 SEA 0 0 .00 1.0 1 0 0 1 1 0
2024 STL 0 0 11.25 8.0 13 10 10 8 11 2
2025 STL 3 0 2.13 42.1 30 12 10 20 40 2
Pitching Splits
  Overall Last 3 Away Home Day Night
W/L
ERA
IP
Hits
Runs
ER
K
BB
HR		 3-0
2.13
42.1
30
12
10
40
20
2		 0-0
0.00
0.0
0
0
0
0
0
0		 1-0
3.93
18.1
14
10
8
21
13
1		 2-0
0.75
24.0
16
2
2
19
7
1		 0-0
1.89
19.0
11
4
4
18
9
1		 3-0
2.31
23.1
19
8
6
22
11
1
OBP
WHIP
GB:FB
SB
CS
SB %
QS %		 .318
1.18
3.43
0
1
0.0
0.0		 .000
0.00
0
0
0
0
0.0		 .365
1.47
3.43
0
0
0
0.0		 .275
0.96
3.43
0
1
0.0
0.0		 .289
1.05
4.00
0
1
0.0
0.0		 .340
1.29
3.11
0
0
0
0.0
TW/TL
AF
AA
Total
Over
Under		 19-17
4.25
4.22
8.47
16
19		 0-0
0.00
0.00
0.00
0
0		 7-9
4.12
4.75
8.88
6
9		 12-8
4.35
3.80
8.15
10
10		 9-7
3.94
4.38
8.31
7
9		 10-10
4.50
4.10
8.60
9
10
Season Injury Log
Date On Date Off Injury Status
9/1/25 9/1/25 Shoulder questionable