2025 Stats
W-L
0-0
ERA
0.00
WHIP
0.00
K
0
SV
0
Rest-of-Season Projections
Brought up from minors
The Cardinals recalled O'Brien from Triple-A Memphis on Friday.
ANALYSIS
He'll absorb the roster spot vacated by Ryan Fernandez, who was optioned to Memphis. O'Brien has yielded three earned runs while striking out 14 over seven innings with Memphis this season. He'll look to help out a struggling St. Louis bullpen.
He'll absorb the roster spot vacated by Ryan Fernandez, who was optioned to Memphis. O'Brien has yielded three earned runs while striking out 14 over seven innings with Memphis this season. He'll look to help out a struggling St. Louis bullpen.
Pitching Stats
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2025
2024
2022
2021
Minor League Game Log
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Pitching Appearances Breakdown
Average Pitch Count
2
Last 10 Games
2
Last 5 Games
2
How many pitches does Riley O'Brien generally throw?
1-10
11-20
21-30
31-40
41-50
51-60
61-70
71-80
81-90
91-100
101-110
111-120
121+
What part of the game does Riley O'Brien generally pitch?
1st
2nd
3rd
4th
5th
6th
7th
8th
9th
Extra
% Games Reaching Innings Threshold
% Games By Number of Innings Pitched
Left/Right Pitching Splits
Since 2023
-21%
BAA vs RHP
2025
No Stats
| BAA | K | BB | H | HR | ||||
|---|---|---|---|---|---|---|---|---|
| Since 2023vs Left | .400 | 4 | 4 | 6 | 1 | |||
| Since 2023vs Right | .318 | 7 | 4 | 7 | 1 | |||
| 2025vs Left | 0 | 0 | 0 | 0 | 0 | |||
| 2025vs Right | .000 | 0 | 0 | 0 | 0 | |||
| 2024vs Left | .400 | 4 | 4 | 6 | 1 | |||
| 2024vs Right | .333 | 7 | 4 | 7 | 1 | |||
| 2023vs Left | 0 | 0 | 0 | 0 | 0 | |||
| 2023vs Right | 0 | 0 | 0 | 0 | 0 | |||
| More Splits→ | View More Split Stats | |||||||
Home/Away Pitching Splits
Since 2023
-83%
ERA at Home
2025
No Stats
| ERA | WHIP | IP | K/9 | BB/9 | |||||
|---|---|---|---|---|---|---|---|---|---|
| Since 2023Home | 2.70 | 1.20 | 3.1 | 5.4 | 5.4 | ||||
| Since 2023Away | 16.20 | 3.40 | 5.0 | 16.2 | 10.8 | ||||
| 2025Home | 0.00 | 0.00 | .333333 | 0.0 | 0.0 | ||||
| 2025Away | 0 | 0 | 0 | 0 | 0 | ||||
| 2024Home | 3.00 | 1.33 | 3.0 | 6.0 | 6.0 | ||||
| 2024Away | 16.20 | 3.40 | 5.0 | 16.2 | 10.8 | ||||
| 2023Home | 0 | 0 | 0 | 0 | 0 | ||||
| 2023Away | 0 | 0 | 0 | 0 | 0 | ||||
| More Splits→ | View More Split Stats | ||||||||
Stat Review
How does Riley O'Brien compare to other relievers?
This section compares his stats with all relief pitcher seasons from the previous three seasons (minimum 30 innings)*. The bar represents the player's percentile rank. For example, if the bar is halfway across, then the player falls into the 50th percentile for that stat and it would be considered average.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
* Exit Velocity, Barrels/BBE %, Balls Hit 95+ MPH %, and Spin Rate are benchmarked against 2019 data (min 30 IP). See here for more exit velocity/barrels stats plus an explanation of current limitations with that data set.
K/BB
0.00K/9
0.0BB/9
0.0HR/9
0.0Fastball
98.0 mphERA
0.00WHIP
0.00BABIP
.000GB/FB
0.00Left On Base
0.0%Exit Velocity
0.0 mphBarrels/BBE
0.0%Spin Rate
0 rpmBalls Hit 95+ MPH
0.0%Swinging Strike
0.0%Advanced Pitching Stats
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Defensive Stats
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Stats Vs Today's Lineup
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More Fantasy News
Optioned to Triple-A
The Cardinals optioned O'Brien to Triple-A Memphis on Saturday.
ANALYSIS
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Returns from elbow issue
O'Brien tossed a scoreless inning Friday versus the Mets after being unavailable for more than two weeks due to right elbow soreness, Derrick Goold of the St. Louis Post-Dispatch reports.
ANALYSIS
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Recalled from Triple-A
The Cardinals recalled O'Brien from Triple-A Memphis on Tuesday, Katie Woo of The Athletic reports.
ANALYSIS
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Activated, sent to Triple-A
The Cardinals activated O'Brien (forearm) from the 60-day injured list Sunday and optioned him to Triple-A Memphis.
ANALYSIS
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Could be activated next week
O'Brien (forearm) could be activated from the 60-day injured list next week after making two more rehab appearances with Triple-A Memphis, John Denton of MLB.com reports.
ANALYSIS
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Latest Fantasy Rumors
Eligible for promotion Monday
O'Brien will be eligible to be recalled by the Cardinals on Monday, and Jeff Jones of the Belleville News-Democrat speculates the right-hander could be called up from Triple-A Memphis at some point this week.
ANALYSIS
O'Brien could have joined the Cardinals over the past couple weeks if the corresponding move was an IL transaction, but he's stayed a Triple-A for the full 15 days. The 29-year-old has made just one appearance in the majors this season but has been dominant in 13 outings for Memphis with a 1.46 ERA, 0.99 WHIP and 9:5 K:BB over 12.1 innings.
O'Brien could have joined the Cardinals over the past couple weeks if the corresponding move was an IL transaction, but he's stayed a Triple-A for the full 15 days. The 29-year-old has made just one appearance in the majors this season but has been dominant in 13 outings for Memphis with a 1.46 ERA, 0.99 WHIP and 9:5 K:BB over 12.1 innings.