P | St. Louis Cardinals
Bats/Throws: R/R | 6' 4" 180 lbs | Age: 30
Draft: 2017 | Rd. 8, No. 229, Tampa Bay Rays | College of Idaho
W L ERA G GS SV IP SO WHIP
2022 0 0 0.00 1 0 0 1 1 2.00
2024 0 0 11.25 8 0 0 8 11 2.63
2025 3 1 2.06 42 0 6 48 45 1.15
4 Seasons 3 2 3.55 52 1 6 58.1 59 1.42
G W-L ERA IP SO WHIP
2022 1 0-0 0.00 1 1 2.00
2024 8 0-0 11.25 8 11 2.63
2025 42 3-1 2.06 48 45 1.15
4 Seasons 52 3-2 3.55 58.1 59 1.42
MLB Percentile Rankings
Movement Profile (Induced Break)
?

Statcast Statistics

Season Age Pitches Batted
Balls
Barrels Barrel % Barrel/PA Exit
Velocity
Max EV Launch
Angle
LA Sweet-
Spot %
XBA XSLG WOBA XWOBA XWOBACON HardHit% K% BB% ERA xERA
2021 26 42 4 2 50.0 22.2 88.8 111.5 -9.5 50.0 .351 1.084 .676 .623 .883 50.0 22.2 33.3 13.50 28.87
2022 27 23 3 0 0.0 0.0 98.5 105.1 -23.0 0.0 .123 .129 .315 .231 .155 66.7 20.0 20.0 0.00 2.18
2024 29 194 26 2 7.7 4.3 89.0 112.3 17.7 42.3 .285 .435 .467 .386 .442 42.3 23.9 17.4 11.25 6.66
2025 30 758 125 4 3.2 2.0 85.8 108.8 4.8 27.2 .234 .301 .270 .296 .316 34.4 22.6 11.1 2.06 3.64
Player 1017 158 8 5.1 3.1 86.7 112.3 6.0 29.7 .244 .342 .320 .322 .348 36.7 22.8 13.1
MLB 7.2 4.9 88.6 122.9 12.4 33.3 .245 .404 .315 .315 .368 37.0 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

O'Brien relies on 4 pitches.
Sinker
(48.3%) ,
Slider
(30.5%) ,
Curveball
(21.1%) ,
Changeup
(0.1%) ,


  •   
  •   
  •   

+ If Available Pitches Click to Video.


  •   
  •   
  •   
  •   
  •   
  •   
  •   

Pitch Tracking



Batted Ball Profile

AIR: Fly Balls + Line Drives + Popups All Batted Balls Batted Ball Breakdown
Season GB % AIR % FB % LD % PU % Pull % Straight % Oppo % Pull GB % Straight GB % Oppo GB % Pull AIR % Straight AIR % Oppo AIR %
2021 50.0 50.0 25.0 25.0 0.0 25.0 75.0 0.0 0.0 50.0 0.0 25.0 25.0 0.0
2022 100.0 0.0 0.0 0.0 0.0 0.0 100.0 0.0 0.0 100.0 0.0 0.0 0.0 0.0
2024 38.5 61.5 30.8 23.1 7.7 61.5 26.9 11.5 30.8 7.7 0.0 30.8 19.2 11.5
2025 55.2 44.8 15.2 24.0 5.6 37.6 36.0 26.4 23.2 26.4 5.6 14.4 9.6 20.8
Player 53.2 46.8 17.7 23.4 5.7 40.5 36.7 22.8 23.4 25.3 4.4 17.1 11.4 18.4
MLB 44.2 55.8 24.0 24.7 7.1 37.4 37.4 25.1 20.6 17.6 5.9 16.7 19.7 19.3
! Note: All figures in this table cover the period 2015-present.

Quality of Contact

Season Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2021 0.0 50.0 0.0 0.0 0.0 50.0 22.2
2022 0.0 100.0 0.0 0.0 0.0 0.0 0.0
2024 0.0 26.9 26.9 34.6 3.8 7.7 4.3
2025 11.2 36.0 16.8 27.2 4.0 3.2 2.0
Player 8.9 36.1 17.7 27.2 3.8 5.1 3.1
MLB 4.0 32.4 24.9 24.4 5.9 7.2 4.9
! Note: All figures in this table cover the period 2015-present.

Pitch Movement


How this works: This section shows two different ways to evaluate pitch movement. On the left, “Total Movement” shows the real-world movement of a pitch, including the forces of gravity, which affects every pitch thrown. Since gravity requires time, and slower pitches aren't 'better' just because they have more time to move, a pitch's movement is compared to other pitches of the same pitch type, within +/- 2 MPH and +/- 0.5 feet of extension/release. On the right, Induced Movement (or IVB) is reported without gravity, and attempts to isolate movement created by the pitcher's ability to spin and manipulate the ball.
Total Movement (in inches, w/ gravity)Induced Movement (in inches, w/o gravity)
YearPitchTeamHand#MPHVertical
Drop
vs.
Comparable
Horizontal
Break
vs.
Comparable
Vertical
Break
vs. AvgHorizontal
Break
vs. Avg
2025 Changeup STL R 1 90.4 28.9 -1.0 16.5ARM 1.8 4.4 -0.3 16.5ARM 2.1
2025 Curveball STL R 160 83.4 41.9 -6.3 16.8GLV 8.3 -2.4 -7.5 16.8GLV 7.7
2025 Slider STL R 231 90.0 30.2 -0.7 3.7GLV 0.1 3.3 -1.6 3.7GLV -0.9
2025 Sinker STL R 366 98.0 22.3 1.7 15.9ARM 0.7 6.1 1.3 15.9ARM 0.8
2024 Curveball STL R 51 82.6 42.7 -5.6 16.0GLV 7.8 -2.3 -7.7 16.0GLV 6.6
2024 Sinker STL R 89 96.8 21.5 0.9 16.7ARM 1.8 7.7 -0.5 16.7ARM 1.8
2024 4-Seam Fastball STL R 4 96.1 17.2 -3.7 6.2ARM -1.1 12.3 -3.4 6.2ARM -1.4
2024 Slider STL R 50 89.8 27.7 -3.6 3.7GLV 0.1 6.1 -4.4 3.7GLV -1.1
! Note: Years are in reverse order.

Run Values by Pitch Type

Year Pitch Type Team RV/100 Run Value Pitches % PA BA SLG wOBA Whiff% K% PutAway % xBA xSLG xwOBA Hard Hit %
2025 Sinker 1.6 6 366 48.3 108 .228 .272 .289 10.8 12.0 16.7 .287 .354 .342 34.2
2025 Slider 0.6 1 231 30.5 49 .238 .357 .297 29.6 26.5 28.9 .246 .322 .287 35.5
2025 Curveball 1.1 2 160 21.1 39 .059 .176 .173 50.7 48.7 23.2 .081 .133 .170 33.3
2025 Changeup -4.1 0 1 0.1 -- -- -- -- -- -- -- -- -- --
2024 Sinker 0.1 0 89 45.9 19 .200 .267 .308 15.6 15.8 21.4 .221 .257 .315 41.7
2024 Curveball -3.5 -2 51 26.3 11 .375 .375 .436 40.0 36.4 18.2 .316 .354 .405 25.0
2024 Slider -9.2 -5 50 25.8 14 .545 1.273 .693 31.8 21.4 33.3 .314 .719 .462 55.6
2024 4-Seam Fastball -13.2 -1 4 2.1 2 .500 1.000 .625 33.3 50.0 33.3 .483 .534 .451 0.0
! Note: Years are in reverse order.
! Note: To better align with other values, positive numbers (red) are good, and negative numbers (blue) are poor.

Spin Direction

Year Pitch Type Pitches MPH Active Spin % Total Movement (In.) Spin-Based Observed Deviation
2025 Curveball 160 83.4 68 18.2 8:00 8:30 -30
2025 Sinker 366 98.0 85 17.5 1:30 2:30 -60
2025 Slider 231 90.0 24 5.0 11:15 10:00 75
2024 Curveball 51 82.6 65 17.5 8:00 8:30 -30
2024 Sinker 89 96.8 89 18.8 1:30 2:15 -45
2024 Slider 50 89.8 34 6.7 12:00 10:45 75
! Note: Years are in reverse order.
+ Show More Seasons
! Note: This table is showing data from the PITCHER perspective.
+ View Complete Spin Direction Leaderboard

Pitcher Arm Angle

! Note: Data is available from 2020 through the present.
+ View Complete Arm Angle Leaderboard

Statcast Pitching Run Value

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2021 9 42 -2 0 0 0 -3
2022 5 23 1 0 0 0 0
2024 46 194 -2 -1 -2 -2 -7
2025 196 758 11 6 -4 -5 9
Player 256 1,017 7 6 -6 7 -1
+ View Complete Pitching Run Value Leaderboard
+ Show Leverage-Based Run Value

Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2021 42 33.3 71.4 90.0 28.6 25.0 33.3 66.7 42.9 38.9 4.8 50.0
2022 23 56.5 76.9 80.0 10.0 100.0 39.1 60.0 47.8 18.2 8.7 100.0
2024 194 44.3 62.8 79.6 21.3 56.5 35.1 45.7 39.7 27.3 8.8 82.4
2025 758 47.4 63.0 88.5 29.1 50.0 46.0 61.9 45.1 24.6 6.5 81.6
Player 1,017 46.4 63.6 86.7 27.2 50.0 43.3 59.1 44.1 25.4 6.9 81.4
MLB 48.9 67.0 82.5 28.4 58.0 42.7 61.1 47.3 25.0 7.3 76.3
! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Year xwOBA /
xERA
xBA xSLG xISO xOBP Brl Brl% EV Hard
Hit%
K% BB% Whiff% Chase
Rate
FB
Velo
FB
Spin
CB
Spin
Extension
2024 89 17 25 93
2025 95 24 29 90
+ View Complete Percentile Rankings Leaderboard

Expected Home Runs

Adjusted

Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2021 22.48 2 1.7 0 0 1 1 50.0
2024 25.68 2 2.0 0 0 1 1 50.0
2025 24.63 2 1.4 1 0 1 1 50.0
Player 24.26 6 5.0 1 0 3 3 50.0
Note: xHR tells how many of this pitcher's batted balls allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.
+ View Standard Expected Home Runs

Expected Home Runs by Park

Adjusted

Year HR
2021 2 2 2 1 1 2 2 1 1 1 1 1 2 2 2 2 2 2 2 1 2 2 2 2 2 2 1 2 2 2 2
2024 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1
2025 2 2 1 1 1 1 1 1 1 1 1 1 1 2 1 1 2 2 1 2 1 1 1 2 2 2 1 2 2 1 2
Player 6 6 5 4 4 5 5 4 4 4 4 4 5 6 5 5 6 6 5 5 5 5 5 6 6 6 4 6 6 5 5
Note: xHR tells how many of this pitcher's batted balls allowed would have been out of other stadiums. The "Adjusted" view here accounts for different wall heights, distances and environmental effects using Statcast Park Factor data.
+ View Standard Expected Home Runs By Park
+ View Complete Expected Home Runs Leaderboard

Year to Year Changes

2025 +/-   2024 +/-   2023 +/-   2022 +/-   2021
Results
BA .196 -.165 .361 -- -- -- -- -.083 .333
xBA .234 -.051 .285 -- -- -- -- -.228 .351
OBP .313 -.165 .478 -- -- -- -- -.156 .556
xOBP .347 -.077 .424 -- -- -- -- -.268 .567
SLG .274 -.365 .639 -- -- -- -- -1.083 1.333
xSLG .301 -.134 .435 -- -- -- -- -.955 1.084
ISO .077 -.201 .278 -- -- -- -- -1.000 1.000
xISO .066 -.084 .150 -- -- -- -- -.727 .733
BABIP .254 -.204 .458 -- -- -- -- +.333 .000
wOBA .270 -.197 .467 -- -- -- -- -.361 .676
xwOBA .296 -.090 .386 -- -- -- -- -.392 .623
wOBACON .274 -.313 .587 -- -- -- -- -.708 1.003
xwOBACON .316 -.126 .442 -- -- -- -- -.728 .883
BACON .266 -.234 .500 -- -- -- -- -.167 .500
xBACON .319 -.084 .403 -- -- -- -- -.361 .526
Statcast Hit Metrics
Hard Hit % 34.4 -7.9 42.3 -- -- -- -- +16.7 50.0
Avg Exit Velocity 85.8 -3.2 89.0 -- -- -- -- +9.7 88.8
Launch Angle Sweet-Spot % 27.2 -15.1 42.3 -- -- -- -- -50.0 50.0
Barrel % 3.2 -4.5 7.7 -- -- -- -- -50.0 50.0
Avg Launch Angle 4.8 -12.9 17.7 -- -- -- -- -13.5 -9.5
Statcast Bat Tracking
Bat Speed 70.5 +1.1 69.4 -- -- -- -- -- --
Attack Angle +2° -- -- -- -- -- --
Ideal Attack Angle % 49.1 +15.2 33.9 -- -- -- -- -- --
Attack Direction -1° -- -- -- -- -- --
Swing Path - Tilt 33° -1° 33° -- -- -- -- -- --
Swing Length 7.2 +0.2 7.0 -- -- -- -- -- --
Statcast Pitch Metrics
Fastball Velocity 98.0 +1.2 96.8 -- -- -- -- +0.5 91.9
Breaking Velocity 87.3 +1.1 86.2 -- -- -- -- -1.0 79.1
Offspeed Velocity 90.4 -- -- -- -- -- -- -- 88.1
Batted Ball Results
Barrels 4 +2 2 -- -- -- -- -2 2
Popup % 5.6 -2.1 7.7 -- -- -- -- 0.0 0.0
Flyball % 15.2 -15.6 30.8 -- -- -- -- -25.0 25.0
Line Drive % 24.0 +0.9 23.1 -- -- -- -- -25.0 25.0
Groundball % 55.2 +16.7 38.5 -- -- -- -- +50.0 50.0
Pull % 37.6 -23.9 61.5 -- -- -- -- -25.0 25.0
Straight Away % 36.0 +9.1 26.9 -- -- -- -- +25.0 75.0
Opposite Field % 26.4 +14.9 11.5 -- -- -- -- 0.0 0.0
Weak Contact % 11.2 +11.2 0.0 -- -- -- -- 0.0 0.0
Pull Airball % 14.4 -16.4 30.8 -- -- -- -- -25.0 25.0
Topped Contact % 36.0 +9.1 26.9 -- -- -- -- +50.0 50.0
Under Contact % 16.8 -10.1 26.9 -- -- -- -- 0.0 0.0
Flare/Burner Contact % 27.2 -7.4 34.6 -- -- -- -- 0.0 0.0
Solid Contact % 4.0 +0.2 3.8 -- -- -- -- 0.0 0.0
HR/FB % 10.5 -14.5 25.0 -- -- -- -- -- 200.0
Popups 7 +5 2 -- -- -- -- 0 0
Flyballs 19 +11 8 -- -- -- -- -1 1
Line Drives 30 +24 6 -- -- -- -- -1 1
Groundballs 69 +59 10 -- -- -- -- +1 2
Plate Discipline
In Zone % 47.4 +3.1 44.3 -- -- -- -- +23.2 33.3
Out of Zone % 52.6 -3.1 55.7 -- -- -- -- -23.2 66.7
Edge % 46.0 +10.9 35.1 -- -- -- -- +5.8 33.3
Zone Swing % 63.0 +0.2 62.8 -- -- -- -- +5.5 71.4
Out of Zone Swing % 29.1 +7.8 21.3 -- -- -- -- -18.6 28.6
In Zone Contact % 88.5 +8.9 79.6 -- -- -- -- -10.0 90.0
Out of Zone Contact % 50.0 -6.5 56.5 -- -- -- -- +75.0 25.0
Whiff % 24.6 -2.7 27.3 -- -- -- -- -20.7 38.9
First Strike % 61.9 +16.2 45.7 -- -- -- -- -6.7 66.7
First Pitch Swing % 31.0 +4.9 26.1 -- -- -- -- +37.8 22.2
Swing % 45.1 +5.4 39.7 -- -- -- -- +4.9 42.9
Meatball Swing % 81.6 -0.8 82.4 -- -- -- -- +50.0 50.0
Meatball % 6.5 -2.3 8.8 -- -- -- -- +3.9 4.8
Zone Swing & Miss % 11.5 -8.9 20.4 -- -- -- -- +10.0 10.0
Out of Zone Swing & Miss % 50.0 +6.5 43.5 -- -- -- -- -75.0 75.0
In Zone 359 +273 86 -- -- -- -- -1 14
Out of Zone 399 +291 108 -- -- -- -- -18 28
Edge 349 +281 68 -- -- -- -- -5 14
In Zone Swings 226 +172 54 -- -- -- -- 0 10
Out of Zone Swings 116 +93 23 -- -- -- -- -7 8
In Zone Swing & Misses 26 +15 11 -- -- -- -- +1 1
Out of Zone Swing & Misses 58 +48 10 -- -- -- -- -6 6
Basic
Pitches 758 +564 194 -- -- -- -- -19 42
PA 199 +153 46 -- -- -- -- -4 9
AB 168 +132 36 -- -- -- -- -2 6
Hits 33 +20 13 -- -- -- -- -1 2
Singles 25 +17 8 -- -- -- -- +1 0
Doubles 5 +3 2 -- -- -- -- 0 0
Triples 1 0 1 -- -- -- -- 0 0
Home Runs 2 0 2 -- -- -- -- -2 2
Walks 22 +14 8 -- -- -- -- -2 3
Strikeouts 45 +34 11 -- -- -- -- -1 2
K% 22.6 -1.3 23.9 -- -- -- -- -2.2 22.2
BB% 11.1 -6.3 17.4 -- -- -- -- -13.3 33.3
HBP 7 +6 1 -- -- -- -- 0 0
Batted Balls 125 +99 26 -- -- -- -- -1 4
Number of Fastballs 366 +273 93 -- -- -- -- -12 23
Number of Offspeed 1 +1 0 -- -- -- -- -9 9
Number of Breaking 391 +290 101 -- -- -- -- +2 10
+ Toggle Viewing All Player's Year to Year Stats

Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2021 Shifts 9 .676 4 0 0.0 5 3 60.0
2022 Shifts 5 .315 2 1 50.0 3 3 100.0
2024 Shades 46 .467 26 0 0.0 20 15 75.0
2025 Shades 197 .270 114 0 0.0 83 42 50.6
! Note: Shifts are through the 2022 season, Shaded starting from the 2023 season, Shift: three or more infielders are on the same side of second base, Shade: positioned outside of their typical responsible slices of the field.
Learn more about how positioning is defined here

Pitch Tempo

Bases EmptyRunners On Base
SeasonTeamPitchesTempoFast %Slow %PitchesTempoFast %Slow %
2021 14 16.5 28.6% 0.0% 7 21.4 0.0% 0.0%
2022 9 16.1 22.2% 0.0% 2 16.9 0.0% 0.0%
2024 35 15.5 28.6% 0.0% 54 17.7 3.7% 1.9%
2025 219 15.8 29.7% 0.9% 118 18.0 1.7% 0.0%

+ View Complete Pitch Tempo Leaderboard

Pitch Distribution