P | Bats/Throws: R/R | 6' 4" 220 lbs | Age: 30
Draft: 2017 | Rd. 3, No. 93, Seattle Mariners | Gonzaga
W L ERA G GS SV IP SO WHIP
2021 0 0 9.95 11 0 0 12.2 11 2.05
2022 0 1 4.60 27 0 0 29.1 26 1.33
2 Seasons 0 1 6.21 38 0 0 42 37 1.55
G W-L ERA IP SO WHIP
2021 11 0-0 9.95 12.2 11 2.05
2022 27 0-1 4.60 29.1 26 1.33
2 Seasons 38 0-1 6.21 42 37 1.55
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 26 230 45 3 6.7 4.7 84.2 109.4 4.2 33.3 .291 .402 .399 .352 .377 35.6 17.2 10.9 9.95 5.44
2022 27 503 84 4 4.8 3.1 85.2 107.9 12.9 35.7 .252 .373 .309 .324 .354 31.0 20.3 10.2 4.60 4.40
Player 733 129 7 5.4 3.6 84.9 109.4 9.8 34.9 .265 .383 .340 .334 .362 32.6 19.3 10.4
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

Mills relies on 3 pitches.
Slider
(37.8%) ,
Sinker
(33.2%) ,
Four Seamer
(29.0%) ,


  •   
  •   
  •   

+ 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 51.1 48.9 20.0 26.7 2.2 33.3 33.3 33.3 26.7 13.3 11.1 6.7 20.0 22.2
2022 44.0 56.0 32.1 20.2 3.6 32.1 40.5 27.4 15.5 21.4 7.1 16.7 19.0 20.2
Player 46.5 53.5 27.9 22.5 3.1 32.6 38.0 29.5 19.4 18.6 8.5 13.2 19.4 20.9
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 8.9 44.4 11.1 22.2 6.7 6.7 4.7
2022 7.1 31.0 25.0 25.0 6.0 4.8 3.1
Player 7.8 35.7 20.2 24.0 6.2 5.4 3.6
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
2022 Sinker KC R 167 91.0 30.6 -5.8 14.9ARM -0.9 2.6 5.7 14.9ARM 0.2
2022 4-Seam Fastball KC R 146 92.3 24.0 0.8 13.7ARM -0.4 8.3 -7.9 13.7ARM 6.3
2022 Slider KC R 190 80.8 35.8 -0.5 7.0GLV 1.1 6.4 -4.6 7.0GLV 1.6
2021 Sinker SEA R 108 92.4 30.6 -3.3 18.5ARM 0.2 1.7 7.1 18.5ARM 3.7
2021 4-Seam Fastball SEA R 55 93.0 23.0 1.8 15.8ARM -0.8 8.9 -7.3 15.8ARM 8.6
2021 Slider SEA R 67 82.5 37.7 1.3 6.1GLV 3.2 2.4 -0.6 6.1GLV 0.6
! 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 %
2022 Slider -0.8 -1 190 37.8 55 .245 .388 .318 27.4 23.6 21.3 .226 .331 .293 25.0
2022 Sinker -0.1 0 167 33.2 34 .357 .464 .389 22.2 2.9 3.8 .359 .472 .388 34.5
2022 4-Seam Fastball 1.9 3 146 29.0 37 .133 .200 .236 35.1 32.4 23.5 .197 .354 .314 36.8
2021 Sinker -1.5 -2 108 47.0 36 .344 .438 .388 13.7 11.1 20.0 .319 .397 .355 31.0
2021 Slider -1.5 -1 67 29.1 14 .333 .417 .332 20.0 21.4 15.0 .250 .284 .260 30.0
2021 4-Seam Fastball -7.1 -4 55 23.9 14 .400 .900 .586 28.6 28.6 16.7 .253 .558 .441 66.7
! 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
2022 4-Seam Fastball 145 92.3 88 16.1 2:15 2:00 15
2022 Sinker 162 91.0 75 15.9 2:15 2:45 -30
2022 Slider 189 80.8 36 9.1 9:45 10:00 -15
2021 4-Seam Fastball 54 93.0 97 18.3 2:15 2:15 0
2021 Sinker 106 92.4 90 19.5 2:15 3:00 -45
2021 Slider 64 82.5 24 6.6 10:15 9:15 60
! Note: Years are in reverse order.
! 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 64 230 1 -3 -3 -2 -7
2022 126 503 3 4 -1 -5 1
Player 190 733 4 1 -5 4 -5
+ 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 230 46.5 57.0 90.2 29.3 69.4 41.3 57.8 42.2 18.6 6.5 60.0
2022 503 48.9 65.4 75.2 30.4 65.4 40.8 53.9 47.5 28.0 7.0 62.9
Player 733 48.2 62.9 79.3 30.0 66.7 40.9 55.2 45.8 25.3 6.8 62.0
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
2021 32 3 93
2022 17 3 87
+ 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 25.31 1 0.6 0 0 1 0 0.0
2022 24.27 1 1.3 0 3 2 0 0.0
Player 24.79 2 2.0 0 3 3 0 0.0
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 1 1 0 0 1 0 1 1 0 0 1 0 1 1 1 1 1 0 1 1 1 1 1 1 0 0 1 0 1 0 1
2022 1 0 1 3 2 2 2 0 1 0 1 4 1 2 1 2 2 0 0 1 2 1 3 0 1 0 2 3 1 1 1
Player 2 1 1 3 3 2 3 1 1 0 2 4 2 3 2 3 3 0 1 2 3 2 4 1 1 0 3 3 2 1 2
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

2022 +/-   2021
Results
BA .243 -.109 .352
xBA .252 -.039 .291
OBP .346 -.076 .422
xOBP .355 -.024 .379
SLG .355 -.164 .519
xSLG .373 -.029 .402
ISO .112 -.055 .167
xISO .121 +.011 .110
BABIP .305 -.104 .409
wOBA .309 -.090 .399
xwOBA .324 -.028 .352
wOBACON .331 -.113 .444
xwOBACON .354 -.023 .377
BACON .313 -.109 .422
xBACON .327 -.035 .362
Statcast Hit Metrics
Hard Hit % 31.0 -4.6 35.6
Avg Exit Velocity 85.2 +1.0 84.2
Launch Angle Sweet-Spot % 35.7 +2.4 33.3
Barrel % 4.8 -1.9 6.7
Avg Launch Angle 12.9 +8.7 4.2
Statcast Bat Tracking
Bat Speed 0.0 -- --
Attack Angle -- --
Ideal Attack Angle % 0.0 -- --
Attack Direction -- --
Swing Path - Tilt -- --
Swing Length 0.0 -- --
Statcast Pitch Metrics
Fastball Velocity 91.6 -1.0 92.6
Breaking Velocity 80.8 -1.7 82.5
Offspeed Velocity 0.0 -- --
Batted Ball Results
Barrels 4 +1 3
Popup % 3.6 +1.4 2.2
Flyball % 32.1 +12.1 20.0
Line Drive % 20.2 -6.5 26.7
Groundball % 44.0 -7.1 51.1
Pull % 32.1 -1.2 33.3
Straight Away % 40.5 +7.2 33.3
Opposite Field % 27.4 -5.9 33.3
Weak Contact % 7.1 -1.8 8.9
Pull Airball % 16.7 +10.0 6.7
Topped Contact % 31.0 -13.4 44.4
Under Contact % 25.0 +13.9 11.1
Flare/Burner Contact % 25.0 +2.8 22.2
Solid Contact % 6.0 -0.7 6.7
HR/FB % 3.7 -7.4 11.1
Popups 3 +2 1
Flyballs 27 +18 9
Line Drives 17 +5 12
Groundballs 37 +14 23
Plate Discipline
In Zone % 48.9 +2.4 46.5
Out of Zone % 51.1 -2.4 53.5
Edge % 40.8 -0.5 41.3
Zone Swing % 65.4 +8.4 57.0
Out of Zone Swing % 30.4 +1.1 29.3
In Zone Contact % 75.2 -15.0 90.2
Out of Zone Contact % 65.4 -4.0 69.4
Whiff % 28.0 +9.4 18.6
First Strike % 53.9 -3.9 57.8
First Pitch Swing % 28.1 0.0 28.1
Swing % 47.5 +5.3 42.2
Meatball Swing % 62.9 +2.9 60.0
Meatball % 7.0 +0.5 6.5
Zone Swing & Miss % 24.8 +13.3 11.5
Out of Zone Swing & Miss % 34.6 +4.0 30.6
In Zone 246 +139 107
Out of Zone 257 +134 123
Edge 205 +110 95
In Zone Swings 161 +100 61
Out of Zone Swings 78 +42 36
In Zone Swing & Misses 40 +33 7
Out of Zone Swing & Misses 27 +16 11
Basic
Pitches 503 +273 230
PA 128 +64 64
AB 107 +53 54
Hits 26 +7 19
Singles 18 +5 13
Doubles 5 +1 4
Triples 2 +1 1
Home Runs 1 0 1
Walks 13 +6 7
Strikeouts 26 +15 11
K% 20.3 +3.1 17.2
BB% 10.2 -0.7 10.9
HBP 5 +4 1
Batted Balls 84 +39 45
Number of Fastballs 313 +150 163
Number of Offspeed 0 0 0
Number of Breaking 190 +123 67
+ Toggle Viewing All Player's Year to Year Stats

Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2021 Shifts 64 .399 47 5 10.6 17 7 41.2
2022 Shifts 126 .309 86 18 20.9 40 19 47.5
! 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 52 20.6 0.0% 0.0% 67 25.0 0.0% 9.0%
2022 131 20.4 0.8% 2.3% 101 22.8 0.0% 11.9%

+ View Complete Pitch Tempo Leaderboard

Pitch Distribution