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Pitcher Data and Usage Tracking

Riley O'Brien
Riley O'Brien
Throws: R
Primary Role(s): Reliever
Age: 30

St. Louis
Team Record: 74 - 79
Head Coach: Oliver Marmol
Pitching Coach: Dusty Blake
Pitcher Snapshot
Pitcher Impact Rating:
80.9
IP (last 7 gm):
4
ERA (last 7 gm):
6.75
Team BP Power Rank:
#28

Pitcher Season Stats

Cumulative Stats
Season G ERA IP PA P/pa SO/pa BB/pa HR/pa SB/pa G/AO AVG OBP xWOBA OPS
2025 37 2.08 43.1 179 3.86 22.9% 11.2% 1.1% - 1.56 0.199 0.315 0.294 0.587
2025 SpringTr 3 0.00 3.0 15 4.27 40.0% 13.3% 0.0% - 3 0.231 0.333 - 0.564
2025: Home 21 0.72 25.0 94 3.68 21.3% 7.4% 1.1% - 1.13 0.190 0.266 - 0.516
2025: Away 16 3.93 18.1 85 4.05 24.7% 15.3% 1.2% - 2.67 0.209 0.369 - 0.668
2025: Vs L 35 - 19.0 76 3.91 32.9% 10.5% 0.0% - 1.5 0.159 0.280 - 0.502
2025: Vs R 37 - 24.1 103 3.84 15.5% 11.7% 1.9% - 1.6 0.227 0.340 - 0.647
2025 Pitch Arsenal
Game Logs
Game Date Opponent IP PA R H 2B 3B HR BB SO SB CS NP-S AVG
2025-09-16 (STL) vs Reds 1.0
9
 3 0 0 0 0 0 0 1 0 0 9-7 0.20
2025-09-14 (STL) @ Brewers 1.0
9
 4 0 0 0 0 0 1 2 0 0 16-10 0.20
2025-09-13 (STL) @ Brewers 0.0
9
 4 3 2 1 0 0 0 0 0 0 18-11 0.21
2025-09-10 (STL) @ Mariners 2.0
10
 10 1 2 1 0 0 2 2 0 0 31-23 0.20
2025-09-07 (STL) vs Giants 1.0
9
 3 0 1 0 0 0 0 0 0 0 11-6 0.19
2025-09-06 (STL) vs Giants 1.0
9
 3 0 0 0 0 0 0 1 0 0 8-7 0.19
2025-08-28 (STL) vs Pirates 1.0
8
 4 0 0 0 0 0 0 0 1 0 13-8 0.19
Advanced Stats
Advanced Stats will be released after the All-Star break

Bullpen Usage & Stats

Last 7 Days
Player IP NP-S ERA Sep-18 Sep-17 Sep-16 Sep-15 Sep-14 Sep-13 Sep-12
Riley O'Brien 2.0 43-28 6.75
1.0
9
9-7
1.0
9
16-10
0.0
9
18-11
Jorge Alcala 3.2 80-51 4.92
1.0
22-14
1.1
6
22-13
1.1
6
36-24
John King 2.0 37-20 0.00
0.2
7
6-5
0.2
6
16-8
0.2
6
15-7
Zack Thompson 0 0-0 3.60
JoJo Romero 3.0 56-32 4.16
1.0
8
11-8
1.0
8
20-13
1.0
8
25-11
Matthew Liberatore 0 0-0 2.70
Andre Pallante 0 0-0 0.00
Kyle Leahy 2.1 64-39 19.31
1.0
8
33-20
1.1
9
31-19
Ryan Fernandez 1.1 29-16 7.73
1.0
11-8
0.1
8
18-8
Chris Roycroft 1.1 39-26 20.30
0.1
7
14-8
1.0
8
25-18
Matt Svanson 3.0 60-39 3.86
1.0
19-14
2.0
6
41-25
Michael McGreevy 0 0-0 13.52
Gordon Graceffo 1.2 30-20 0.00
1.0
16-12
0.2
9
14-8
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
IP
In
NP-S
Advanced Pitcher Traits
Games Pitched this Season:
37
Games Started this Season:
0
Pitchers versus LH batters:
Rarely
Pitchers versus RH batters:
Yes
Avg Inning when called:
7
Avg Run Diff when called:
2.73
Pitches over 30 pitches:
Yes
Pitches before the 8th:
Yes
Pitches back to back days:
No
Other St. Louis Pitchers

Jon Lester (L)
Wade LeBlanc (L)
J.A. Happ (L)
Kwang Hyun Kim (L)
Jorge Alcala (R)
John King (L)
JoJo Romero (L)
Riley O'Brien (R)
Kyle Leahy (R)
Ryan Fernandez (R)
Chris Roycroft (R)
Matt Svanson (R)
Gordon Graceffo (R)

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