Riley O'Brien

Riley O'Brien

29-Year-Old PitcherRP
St. Louis Cardinals
2024 Fantasy Outlook
There was no outlook written for Riley O'Brien in 2024. Check out the latest news below for more on his current fantasy value.
RANKS
Rest of Season
From Preseason
#362
ADP
$Signed a one-year contract with the Cardinals in March of 2024.
Recalled from Triple-A
PSt. Louis Cardinals
August 27, 2024
The Cardinals recalled O'Brien from Triple-A Memphis on Tuesday, Katie Woo of The Athletic reports.
ANALYSIS
O'Brien made the Cardinals' Opening Day roster but suffered a flexor strain in his first appearance and missed the remainder of the first half. He has pitched well since resurfacing at Memphis, posting a 1.35 ERA and 9:5 K:BB over 13.1 innings, to earn another look with the big club.
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Pitching Stats
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2024
2022
2021
2024 MLB Game Log
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Scoring
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2022 MLB Game Log
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Pitching Appearances Breakdown
Average Pitch Count
24
Last 10 Games
24
Last 5 Games
26
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+
 
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+
 
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
 
 
 
1st
 
 
 
2nd
 
 
 
3rd
 
 
 
4th
 
 
 
5th
 
 
 
6th
 
 
 
7th
 
 
 
8th
 
 
 
9th
 
Extra
 
 
 
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 2022
 
 
-9%
BAA vs LHP
2024
 
 
-17%
BAA vs RHP
2023
No Stats
2022
 
 
-100%
BAA vs LHP
BAA Batters K BB H 2B 3B HR
Since 2022vs Left .333 23 5 4 6 1 1 1
Since 2022vs Right .364 28 7 5 8 1 0 1
2024vs Left .400 20 4 4 6 1 1 1
2024vs Right .333 26 7 4 7 1 0 1
2023vs Left 0 0 0 0 0 0 0 0
2023vs Right 0 0 0 0 0 0 0 0
2022vs Left .000 3 1 0 0 0 0 0
2022vs Right 1.000 2 0 1 1 0 0 0
More Splits View More Split Stats
Home/Away Pitching Splits
Since 2022
 
 
-86%
ERA at Home
2024
 
 
-81%
ERA at Home
2023
No Stats
2022
No Stats
ERA WHIP IP W L SV K/9 BB/9 HR/9
Since 2022Home 2.25 1.50 4.0 0 0 0 6.8 6.8 0.0
Since 2022Away 16.20 3.40 5.0 0 0 0 16.2 10.8 3.6
2024Home 3.00 1.33 3.0 0 0 0 6.0 6.0 0.0
2024Away 16.20 3.40 5.0 0 0 0 16.2 10.8 3.6
2023Home 0 0 0 0 0 0 0 0 0
2023Away 0 0 0 0 0 0 0 0 0
2022Home 0.00 2.00 1.0 0 0 0 9.0 9.0 0.0
2022Away 0 0 0 0 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.
  • K/BB
    Strikeout to walk ratio.
  • K/9
    Average strikeouts per nine innings.
  • BB/9
    Average walks per nine innings.
  • HR/9
    Average home runs allowed per nine innings.
  • Fastball
    Average fastball velocity.
  • ERA
    Earned run average. The average earned runs allowed per nine innings.
  • WHIP
    Walks plus hits per inning pitched.
  • BABIP
    Batting average on balls in play. Measures how many balls in play against a pitcher go for hits.
  • GB/FB
    Groundball to flyball ratio. The higher the number, the more likely a pitcher is to induce groundballs.
  • Left On Base
    The percentage of base runners that a pitcher strands on base over the course of a season.
  • Exit Velocity
    The speed of the baseball as it comes off the bat, immediately after a batter makes contact.
  • Barrels/BBE
    The percentage of batted ball events resulting in a Barrel. A Barrel is a batted ball with similar exit velocity and launch angle to past ones that led to a minimum .500 batting average and 1.500 slugging percentage.
  • Spin Rate
    Spin Rate is the rate of spin on a baseball after it is released. It is measured in revolutions per minute (rpm).
  • Balls Hit 95+ MPH
    The percentage of batted balls hit that met or exceeded the 95 MPH threshold.
  • Swinging Strike
    The percentage of pitches that result in a swing and a miss.
K/BB
1.38
 
K/9
12.4
 
BB/9
9.0
 
HR/9
2.3
 
Fastball
96.8 mph
 
ERA
11.25
 
WHIP
2.63
 
BABIP
.488
 
GB/FB
1.00
 
Left On Base
60.4%
 
Exit Velocity
81.3 mph
 
Barrels/BBE
3.8%
 
Spin Rate
2251 rpm
 
Balls Hit 95+ MPH
22.6%
 
Swinging Strike
10.8%
 
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
Activated, sent to Triple-A
PSt. Louis Cardinals
August 11, 2024
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
PSt. Louis Cardinals
Forearm
August 2, 2024
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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Starting rehab assignment
PSt. Louis Cardinals
Forearm
July 19, 2024
O'Brien (forearm) will begin a rehab assignment with Triple-A Memphis on Friday, John Denton of MLB.com reports.
ANALYSIS
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Could begin rehab assignment soon
PSt. Louis Cardinals
Forearm
July 12, 2024
O'Brien (forearm) is scheduled to throw live batting practice Saturday with Double-A Springfield and could start a rehab assignment next week if it goes well, John Denton of MLB.com reports.
ANALYSIS
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Set for another live session
PSt. Louis Cardinals
Forearm
July 10, 2024
Cardinals manager Oliver Marmol said that O'Brien (forearm) will throw a live batting practice session at Double-A Springfield on Wednesday, John Denton of MLB.com reports.
ANALYSIS
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Latest Fantasy Rumors
Eligible for promotion Monday
PSt. Louis Cardinals
August 25, 2024
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.
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