P | Washington Nationals
Bats/Throws: L/L | 6' 4" 225 lbs | Age: 31
Draft: 2016 | Rd. 4, No. 125, San Francisco Giants | Oregon
W L ERA G GS SV IP SO WHIP
2024 0 0 18.00 1 0 0 1 2 2.00
2025 0 0 5.40 3 0 0 3.1 3 1.80
2026 0 1 10.80 11 0 0 8.1 9 2.28
4 Seasons 0 1 13.50 19 0 0 16.2 17 2.46
G W-L ERA IP SO WHIP
2024 1 0-0 18.00 1 2 2.00
2025 3 0-0 5.40 3.1 3 1.80
2026 11 0-1 10.80 8.1 9 2.28
4 Seasons 19 0-1 13.50 16.2 17 2.46
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
2023 28 107 18 1 5.6 3.7 81.2 105.6 -2.2 33.3 .238 .381 .471 .362 .311 27.8 11.1 22.2 24.75 5.74
2024 29 27 3 1 33.3 16.7 96.6 107.4 0.5 33.3 .290 .746 .456 .473 .716 66.7 33.3 16.7 18.00 11.05
2025 30 71 11 1 9.1 6.7 91.3 104.2 21.6 36.4 .246 .451 .417 .324 .384 36.4 20.0 6.7 5.40 4.39
2026 31 165 25 1 4.0 2.3 87.5 112.3 9.8 44.0 .293 .448 .404 .397 .430 36.0 20.9 16.3 8.64 7.15
Player 370 57 4 7.0 4.4 86.6 112.3 7.6 38.6 .269 .451 .430 .380 .399 35.1 18.7 16.5
MLB 7.6 4.9 88.6 122.9 12.5 33.3 .243 .407 .316 .316 .369 37.1 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Krook relies on 4 pitches.
Sweeper
(53.9%) ,
Sinker
(41.2%) ,
Cutter
(4.2%) ,
Changeup
(0.6%) ,


  •   
  •   
  •   

+ 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 %
2023 61.1 38.9 16.7 16.7 5.6 50.0 33.3 16.7 44.4 16.7 0.0 5.6 16.7 16.7
2024 66.7 33.3 33.3 0.0 0.0 66.7 33.3 0.0 33.3 33.3 0.0 33.3 0.0 0.0
2025 36.4 63.6 18.2 36.4 9.1 45.5 18.2 36.4 18.2 9.1 9.1 27.3 9.1 27.3
2026 48.0 52.0 12.0 32.0 8.0 48.0 40.0 12.0 28.0 20.0 0.0 20.0 20.0 12.0
Player 50.9 49.1 15.8 26.3 7.0 49.1 33.3 17.5 31.6 17.5 1.8 17.5 15.8 15.8
MLB 44.1 55.9 24.2 24.6 7.1 37.5 37.3 25.1 20.7 17.6 5.8 16.8 19.7 19.2
! Note: All figures in this table cover the period 2015-present.

Quality of Contact

Season Weak % Topped % Under % Flare/Burner % Solid % Barrel % Barrel/PA
2023 16.7 44.4 22.2 11.1 0.0 5.6 3.7
2024 0.0 33.3 0.0 33.3 0.0 33.3 16.7
2025 9.1 18.2 18.2 27.3 18.2 9.1 6.7
2026 8.0 32.0 4.0 44.0 8.0 4.0 2.3
Player 10.5 33.3 12.3 29.8 7.0 7.0 4.4
MLB 4.0 32.3 25.0 24.4 5.9 7.6 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
2026 Cutter WSH L 7 87.1 31.8 -3.5 0.2ARM -3.2 4.1 -3.4 0.2ARM -2.3
2026 Sweeper WSH L 89 82.1 40.3 0.3 14.2GLV 0.0 0.4 0.2 14.2GLV 0.5
2026 Sinker WSH L 68 89.7 30.6 6.7 15.8ARM 1.7 3.4 4.1 15.8ARM 0.4
2026 Changeup WSH L 1 83.4 39.9 6.1 12.6ARM -1.3 -0.1 4.8 12.6ARM -1.3
2025 Changeup ATH L 12 85.1 40.6 8.4 16.3ARM 2.0 -2.5 7.7 16.3ARM 2.1
2025 Cutter ATH L 17 87.4 30.0 -1.8 0.1GLV -2.5 5.7 -2.1 0.1GLV -1.8
2025 Sinker ATH L 23 89.7 31.8 7.0 16.8ARM 2.5 2.5 5.0 16.8ARM 1.4
2025 Sweeper ATH L 19 82.5 40.4 0.1 16.6GLV 2.8 0.3 0.7 16.6GLV 3.6
! 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 %
2026 Sweeper -3.8 -3 89 53.9 26 .300 .700 .481 33.3 26.9 21.2 .266 .499 .408 38.5
2026 Sinker 1.2 1 68 41.2 16 .154 .154 .300 16.1 12.5 15.4 .283 .321 .345 36.4
2026 Cutter -5.4 0 7 4.2 1 1.000 1.000 .900 25.0 0.0 0.0 .963 1.087 .905 0.0
2026 Changeup -2.9 0 1 0.6 -- -- -- -- -- -- -- -- -- --
2025 Sinker 0.2 0 23 32.4 4 .333 .667 .417 11.1 0.0 0.0 .410 .881 .544 50.0
2025 Sweeper 1.3 0 19 26.8 2 .000 .000 .000 0.0 50.0 11.1 .010 .011 .009 0.0
2025 Cutter 0.4 0 17 23.9 7 .333 .333 .357 36.4 28.6 25.0 .189 .245 .262 25.0
2025 Changeup -11.7 -1 12 16.9 2 1.000 1.500 1.075 28.6 0.0 0.0 .407 .866 .530 50.0
! 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
2026 Sinker 68 89.7 84 16.7 10:00 9:15 45
2026 Sweeper 88 82.2 47 15.2 4:00 3:15 45
2025 Changeup 12 85.1 83 17.9 9:30 8:30 60
2025 Cutter 17 87.4 21 4.8 11:15 12:00 -45
2025 Sinker 23 89.7 78 17.9 10:15 9:00 75
2025 Sweeper 19 82.5 54 17.7 4:00 3:15 45
! 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
2023 27 107 0 -2 -2 0 -4
2024 6 27 0 -1 0 0 -1
2025 15 71 1 -1 0 0 -1
2026 43 165 0 0 -1 -2 -3
Player 91 370 0 -3 -3 0 -9
+ 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 %
2023 107 43.0 58.7 81.5 26.2 62.5 43.0 44.4 40.2 25.6 3.7 75.0
2024 27 48.1 76.9 90.0 21.4 66.7 25.9 16.7 48.1 15.4 11.1 100.0
2025 71 50.7 66.7 83.3 25.7 66.7 42.3 60.0 46.5 21.2 7.0 80.0
2026 165 40.6 65.7 88.6 30.6 53.3 35.8 55.8 44.8 25.7 5.5 77.8
Player 370 43.8 64.8 85.7 27.9 58.6 38.4 50.5 44.1 23.9 5.7 81.0
MLB 48.7 67.0 82.6 28.6 57.9 42.6 61.2 47.3 25.0 7.3 76.2
! Note: All figures in this table cover the period 2015-present.

Percentile Rankings

Run Value Pitching
Year Pitching Fastball Breaking Off
Speed
xERA Fastball
MPH
Fastball
Spin
Curve
Spin
Avg
EV
Chase% Whiff% K% BB% Barrel% Hard-
Hit%
GB% Extension
2023 3 14 21
2024
2025
2026 3 4 13
+ View Complete Percentile Rankings Leaderboard
+ Compare To Other Players

Expected Home Runs

Adjusted

Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2023 26.47 1 1.0 0 0 0 1 100.0
2024 22.57 1 1.0 0 0 0 1 100.0
2026 26.75 2 2.0 0 0 0 2 100.0
Player 25.63 4 4.0 0 0 0 4 100.0
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
2023 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
2024 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1
2026 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 2
Player 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4
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

2026 +/-   2025 +/-   2024 +/-   2023
Results
BA .265 -.120 .385 +.185 .200 -.200 .400
xBA .293 +.047 .246 -.044 .290 +.052 .238
OBP .419 -.010 .429 +.096 .333 -.186 .519
xOBP .441 +.141 .300 -.109 .409 +.003 .406
SLG .500 -.038 .538 -.262 .800 +.200 .600
xSLG .448 -.003 .451 -.295 .746 +.365 .381
ISO .235 +.081 .154 -.446 .600 +.400 .200
xISO .155 -.050 .205 -.251 .456 +.313 .143
BABIP .304 -.196 .500 +.500 .000 -.412 .412
wOBA .404 -.013 .417 -.039 .456 -.015 .471
xwOBA .397 +.073 .324 -.149 .473 +.111 .362
wOBAcon .441 -.074 .515 -.168 .683 +.208 .475
xwOBAcon .430 +.046 .384 -.332 .716 +.405 .311
BACON .360 -.140 .500 +.167 .333 -.111 .444
xBACON .399 +.079 .320 -.164 .484 +.208 .276
Statcast Hit Metrics
Hard Hit % 36.0 -0.4 36.4 -30.3 66.7 +38.9 27.8
Avg Exit Velocity 87.5 -3.8 91.3 -5.3 96.6 +15.4 81.2
Launch Angle Sweet-Spot % 44.0 +7.6 36.4 +3.1 33.3 0.0 33.3
Barrel % 4.0 -5.1 9.1 -24.2 33.3 +27.7 5.6
Avg Launch Angle 9.8 -11.8 21.6 +21.1 0.5 +2.7 -2.2
Statcast Bat Tracking
Bat Speed 71.0 +0.9 70.1 -1.5 71.6 -0.6 72.2
Attack Angle 14° +1° 13° 13° -6° 19°
Ideal Attack Angle % 44.3 -17.0 61.3 -29.6 90.9 +35.3 55.6
Attack Direction -9° -2° -7° -3° -4° +5° -9°
Swing Path - Tilt 37° +2° 35° +5° 30° -1° 31°
Swing Length 7.7 +0.4 7.3 -0.1 7.4 -0.7 8.1
Statcast Pitch Metrics
Fastball Velocity 89.4 +0.7 88.7 -1.1 89.8 +1.6 88.2
Breaking Velocity 82.1 -0.4 82.5 +0.5 82.0 +0.9 81.1
Offspeed Velocity 83.4 -1.7 85.1 +0.6 84.5 +1.7 82.8
Batted Ball Results
Barrels 1 0 1 0 1 0 1
Popup % 8.0 -1.1 9.1 +9.1 0.0 -5.6 5.6
Flyball % 12.0 -6.2 18.2 -15.1 33.3 +16.6 16.7
Line Drive % 32.0 -4.4 36.4 +36.4 0.0 -16.7 16.7
Groundball % 48.0 +11.6 36.4 -30.3 66.7 +5.6 61.1
Pull % 48.0 +2.5 45.5 -21.2 66.7 +16.7 50.0
Straight Away % 40.0 +21.8 18.2 -15.1 33.3 0.0 33.3
Opposite Field % 12.0 -24.4 36.4 +36.4 0.0 -16.7 16.7
Weak Contact % 8.0 -1.1 9.1 +9.1 0.0 -16.7 16.7
Pull Airball % 20.0 -7.3 27.3 -6.0 33.3 +27.7 5.6
Topped Contact % 32.0 +13.8 18.2 -15.1 33.3 -11.1 44.4
Under Contact % 4.0 -14.2 18.2 +18.2 0.0 -22.2 22.2
Flare/Burner Contact % 44.0 +16.7 27.3 -6.0 33.3 +22.2 11.1
Solid Contact % 8.0 -10.2 18.2 +18.2 0.0 0.0 0.0
HR/FB % 66.7 +66.7 0.0 -100.0 100.0 +66.7 33.3
Popups 2 +1 1 +1 0 -1 1
Flyballs 3 +1 2 +1 1 -2 3
Line Drives 8 +4 4 +4 0 -3 3
Groundballs 12 +8 4 +2 2 -9 11
Plate Discipline
In Zone % 40.6 -10.1 50.7 +2.6 48.1 +5.1 43.0
Out of Zone % 59.4 +10.1 49.3 -2.6 51.9 -5.1 57.0
Edge % 35.8 -6.5 42.3 +16.4 25.9 -17.1 43.0
Zone Swing % 65.7 -1.0 66.7 -10.2 76.9 +18.2 58.7
Out of Zone Swing % 30.6 +4.9 25.7 +4.3 21.4 -4.8 26.2
In Zone Contact % 88.6 +5.3 83.3 -6.7 90.0 +8.5 81.5
Out of Zone Contact % 53.3 -13.4 66.7 0.0 66.7 +4.2 62.5
Whiff % 25.7 +4.5 21.2 +5.8 15.4 -10.2 25.6
First Strike % 55.8 -4.2 60.0 +43.3 16.7 -27.7 44.4
First Pitch Swing % 23.3 -3.4 26.7 +10.0 16.7 +13.0 3.7
Swing % 44.8 -1.7 46.5 -1.6 48.1 +7.9 40.2
Meatball Swing % 77.8 -2.2 80.0 -20.0 100.0 +25.0 75.0
Meatball % 5.5 -1.5 7.0 -4.1 11.1 +7.4 3.7
Zone Swing & Miss % 11.4 -5.3 16.7 +6.7 10.0 -8.5 18.5
Out of Zone Swing & Miss % 46.7 +13.4 33.3 0.0 33.3 -4.2 37.5
In Zone 67 +31 36 +23 13 -33 46
Out of Zone 98 +63 35 +21 14 -47 61
Edge 59 +29 30 +23 7 -39 46
In Zone Swings 44 +20 24 +14 10 -17 27
Out of Zone Swings 30 +21 9 +6 3 -13 16
In Zone Swing & Misses 5 +1 4 +3 1 -4 5
Out of Zone Swing & Misses 14 +11 3 +2 1 -5 6
Basic
Pitches 165 +94 71 +44 27 -80 107
PA 43 +28 15 +9 6 -21 27
AB 34 +21 13 +8 5 -15 20
Hits 9 +4 5 +4 1 -7 8
Singles 6 +3 3 +3 0 -6 6
Doubles 0 -2 2 +2 0 -1 1
Triples 1 +1 0 0 0 0 0
Home Runs 2 +2 0 -1 1 0 1
Walks 7 +6 1 0 1 -5 6
Strikeouts 9 +6 3 +1 2 -1 3
K% 20.9 +0.9 20.0 -13.3 33.3 +22.2 11.1
BB% 16.3 +9.6 6.7 -10.0 16.7 -5.5 22.2
HBP 2 +2 0 0 0 0 0
Batted Balls 25 +14 11 +8 3 -15 18
Fastball Percent 45.5 -10.8 56.3 -17.8 74.1 -6.3 80.4
Offspeed Percent 0.6 -16.3 16.9 +13.2 3.7 +0.9 2.8
Breaking Percent 53.9 +27.1 26.8 +4.6 22.2 +5.4 16.8
Number of Fastballs 75 +35 40 +20 20 -66 86
Number of Offspeed 1 -11 12 +11 1 -2 3
Number of Breaking 89 +70 19 +13 6 -12 18
+ Toggle Viewing All Player's Year to Year Stats

Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2023 Shades 27 .471 16 0 0.0 11 1 9.1
2024 Shades 6 .456 5 0 0.0 1 0 0.0
2025 Shades 15 .417 10 1 10.0 5 2 40.0
2026 Shades 43 .404 22 3 13.6 21 7 33.3
! 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 %
2023 19 17.3 21.1% 0.0% 32 17.8 0.0% 3.1%
2024 7 16.7 0.0% 0.0% 2 17.5 0.0% 0.0%
2025 16 16.0 18.8% 0.0% 13 18.8 0.0% 0.0%
2026 39 16.4 12.8% 0.0% 31 18.9 0.0% 6.5%

+ View Complete Pitch Tempo Leaderboard

Pitch Distribution