P | Bats/Throws: R/R | 6' 2" 214 lbs | Age: 31
Draft: 2017 | Rd. 19, No. 565, Los Angeles Angels | Pittsburgh
W L ERA G GS SV IP SO WHIP
2024 0 0 5.06 3 0 0 5.1 6 1.13
2025 3 3 2.45 44 0 0 47.2 45 1.13
2026 0 0 4.93 36 0 0 34.2 33 1.56
4 Seasons 3 3 3.72 87 0 0 92 87 1.35
G W-L ERA IP SO WHIP
2024 3 0-0 5.06 5.1 6 1.13
2025 44 3-3 2.45 47.2 45 1.13
2026 36 0-0 4.93 34.2 33 1.56
4 Seasons 87 3-3 3.72 92 87 1.35
Player Apps
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Pitch Usage
MLB Percentile Rankings
Movement Profile (Induced Break)
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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 25 91 15 2 13.3 8.7 90.0 107.1 25.2 26.7 .217 .541 .357 .397 .377 46.7 13.0 21.7 6.23 7.21
2024 28 100 11 1 9.1 4.3 83.3 104.3 6.8 36.4 .221 .334 .219 .360 .374 27.3 26.1 21.7 5.06 5.48
2025 29 777 132 8 6.1 4.0 89.4 112.3 23.8 33.3 .208 .361 .264 .283 .321 39.4 22.7 9.6 2.46 3.28
2026 30 648 106 14 13.2 9.0 91.9 111.5 18.1 47.2 .292 .506 .344 .376 .441 50.0 21.2 10.3 4.93 6.23
Player 1616 264 25 9.5 6.3 90.2 112.3 20.9 38.6 .243 .427 .298 .331 .375 43.6 21.8 11.3
MLB 7.6 4.9 88.6 122.9 12.5 33.3 .243 .407 .315 .316 .369 37.1 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Mattson relies on 4 pitches.
Four Seamer
(70.7%) ,
Slider
(11.9%) ,
Changeup
(9.7%) ,
Sweeper
(7.7%) ,


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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 33.3 66.7 53.3 6.7 6.7 20.0 33.3 46.7 13.3 13.3 6.7 6.7 20.0 40.0
2024 54.5 45.5 18.2 18.2 9.1 9.1 54.5 36.4 0.0 36.4 18.2 9.1 18.2 18.2
2025 28.8 71.2 32.6 22.0 16.7 21.2 43.2 35.6 8.3 15.2 5.3 12.9 28.0 30.3
2026 25.5 74.5 32.1 34.0 8.5 28.3 37.7 34.0 7.5 13.2 4.7 20.8 24.5 29.2
Player 28.8 71.2 33.0 25.8 12.5 23.5 40.9 35.6 8.0 15.2 5.7 15.5 25.8 29.9
MLB 44.1 55.9 24.2 24.6 7.1 37.5 37.3 25.1 20.7 17.5 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
2021 0.0 20.0 40.0 13.3 13.3 13.3 8.7
2024 9.1 27.3 18.2 27.3 9.1 9.1 4.3
2025 5.3 18.2 40.9 21.2 8.3 6.1 4.0
2026 6.6 17.0 28.3 27.4 7.5 13.2 9.0
Player 5.7 18.2 34.8 23.5 8.3 9.5 6.3
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

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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 Changeup PIT R 63 86.0 31.5 -0.7 9.6ARM -4.3 5.5 -1.7 9.6ARM -4.7
2026 Sweeper PIT R 50 82.9 40.9 1.8 10.1GLV -3.8 -1.1 2.1 10.1GLV -3.5
2026 4-Seam Fastball PIT R 458 94.1 12.9 1.8 9.4ARM 2.1 18.1 2.4 9.4ARM 1.6
2026 Slider PIT R 77 84.2 36.3 -1.2 3.2GLV -1.0 2.4 -1.0 3.2GLV -0.5
2025 Slider PIT R 68 85.3 32.0 -3.8 3.0GLV -1.1 5.6 -3.8 3.0GLV -1.2
2025 Curveball PIT R 9 79.0 50.1 -4.6 4.3GLV -4.3 -6.5 -3.7 4.3GLV -4.7
2025 4-Seam Fastball PIT R 610 93.9 12.4 2.0 8.2ARM 1.3 18.7 2.9 8.2ARM 0.6
2025 Changeup PIT R 90 85.9 28.4 -3.9 11.4ARM -2.9 8.7 -4.6 11.4ARM -3.1
! 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 %
2026 4-Seam Fastball 0.5 2 458 70.7 113 .258 .371 .327 20.2 18.6 13.6 .295 .507 .386 53.2
2026 Slider -2.5 -2 77 11.9 18 .389 .722 .469 27.9 27.8 27.8 .364 .548 .392 46.2
2026 Changeup -2.7 -2 63 9.7 7 .429 .571 .436 21.1 28.6 8.7 .232 .503 .310 40.0
2026 Sweeper 0.5 0 50 7.7 18 .188 .375 .289 30.8 27.8 21.7 .216 .452 .327 36.4
2025 4-Seam Fastball 1.3 8 610 78.5 138 .191 .287 .267 23.1 25.4 19.1 .205 .337 .288 40.0
2025 Changeup -2.6 -2 90 11.6 33 .281 .406 .338 18.0 12.1 10.5 .270 .464 .324 42.9
2025 Slider 2.8 2 68 8.8 23 .130 .304 .180 32.4 21.7 19.2 .139 .350 .204 33.3
2025 Curveball -3.7 0 9 1.2 1 1.000 1.000 .900 0.0 0.0 0.0 .405 .446 .375 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
2026 Changeup 55 86.0 95 12.0 1:45 2:15 -30
2026 4-Seam Fastball 458 94.1 98 20.2 1:00 1:00 0
2026 Slider 77 84.2 28 5.9 9:00 9:15 -15
2026 Sweeper 50 82.9 35 11.4 7:45 8:30 -45
2025 Changeup 87 85.9 95 14.3 1:45 2:00 -15
2025 4-Seam Fastball 593 93.8 98 20.1 1:00 12:45 15
2025 Slider 65 85.1 40 6.1 11:30 10:45 45
! Note: Years are in reverse order.
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! Note: This table is showing data from the PITCHER perspective.
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Pitcher Arm Angle

! Note: Data is available from 2020 through the present.
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Statcast Pitching Run Value

Runs
Year Team PA Pitches Heart Shadow Chase Waste All
2021 23 91 1 0 -1 -1 -1
2024 23 100 2 1 -1 0 1
2025 195 777 7 10 -8 -2 7
2026 156 648 5 4 -8 -2 -1
Player 397 1,616 16 15 -19 16 7
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Plate Discipline

Season Pitches Zone % Zone Swing % Zone Contact % Chase % Chase Contact % Edge % 1st Pitch Strike % Swing % Whiff % Meatball % Meatball Swing %
2021 91 42.9 71.8 82.1 25.0 61.5 34.1 52.2 45.1 24.4 5.5 60.0
2024 100 47.0 68.1 81.3 26.4 64.3 45.0 47.8 46.0 23.9 10.0 90.0
2025 777 54.2 69.4 79.5 29.2 69.2 42.2 66.3 51.0 23.2 8.4 80.0
2026 648 51.4 71.2 84.8 26.7 58.3 38.4 56.4 49.5 22.1 9.1 79.7
Player 1,616 52.0 70.1 81.8 27.7 64.2 40.4 60.6 49.8 22.9 8.6 79.9
MLB 48.7 67.0 82.7 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
2021 36 57 84
2024 50 77 70
2025 43 74 77
2026 36 55 34 23 2 42 72 1 13 24 39 25 3 1 1 75
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Expected Home Runs

Adjusted
Year Team Avg HR Trot Actual HR xHR HR-xHR Doubters Mostly Gone No Doubters No Doubter %
2021 -- 0 0.3 0 2 0 0 --
2025 21.04 4 3.9 0 1 4 1 25.0
2026 25.12 3 3.9 -1 1 4 2 66.7
Player 22.79 7 8.1 -1 4 8 3 42.9
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.
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Expected Home Runs by Park

Adjusted
Year HR
2021 0 0 0 1 0 0 0 1 0 0 0 2 0 0 0 1 0 0 0 0 0 1 1 0 0 0 1 0 0 0 0
2025 4 4 2 3 3 4 4 5 3 3 4 3 5 5 4 4 4 3 4 5 5 3 4 4 4 2 4 5 5 5 4
2026 3 5 4 2 4 4 4 3 4 4 3 4 3 5 5 4 4 3 5 5 3 4 5 6 2 2 3 4 6 4 4
Player 7 9 6 6 7 8 8 9 7 7 7 9 8 10 9 9 8 6 9 10 8 8 10 10 6 4 8 9 11 9 8
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.
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Year to Year Changes

2026 +/-   2025 +/-   2024
Results
BA .275 +.072 ↑ .203 +.144 ↑ .059
xBA .292 +.084 ↑ .208 -.013 ↓ .221
OBP .353 +.067 ↑ .286 -.018 ↓ .304
xOBP .367 +.077 ↑ .290 -.134 ↓ .424
SLG .428 +.114 ↑ .314 +.255 ↑ .059
xSLG .506 +.145 ↑ .361 +.027 ↑ .334
ISO .152 +.042 ↑ .110 +.110 ↑ .000
xISO .214 +.061 ↑ .153 +.040 ↑ .113
BABIP .340 +.094 ↑ .246 +.155 ↑ .091
wOBA .344 +.080 ↑ .264 +.045 ↑ .219
xwOBA .376 +.093 ↑ .283 -.077 ↓ .360
wOBAcon .393 +.100 ↑ .293 +.213 ↑ .080
xwOBAcon .441 +.120 ↑ .321 -.053 ↓ .374
BACON .358 +.089 ↑ .269 +.178 ↑ .091
xBACON .380 +.104 ↑ .276 -.066 ↓ .342
Statcast Hit Metrics
Hard Hit % 50.0 +10.6 ↑ 39.4 +12.1 ↑ 27.3
Avg Exit Velocity 91.9 +2.5 ↑ 89.4 +6.1 ↑ 83.3
Launch Angle Sweet-Spot % 47.2 +13.9 ↑ 33.3 -3.1 ↓ 36.4
Barrel % 13.2 +7.1 ↑ 6.1 -3.0 ↓ 9.1
Avg Launch Angle 18.1 -5.7 ↓ 23.8 +17.0 ↑ 6.8
Statcast Bat Tracking
Bat Speed 71.3 +0.7 ↑ 70.6 +1.5 ↑ 69.1
Attack Angle 6° 0° ↑ 6° 0° ↓ 6°
Ideal Attack Angle % 45.5 +0.5 ↑ 45.0 +7.5 ↑ 37.5
Attack Direction 4° 0° ↓ 4° 0° ↓ 4°
Swing Path - Tilt 31° 0° ↑ 31° +1° ↑ 31°
Swing Length 7.0 +0.1 ↑ 6.9 -0.2 ↓ 7.1
Statcast Pitch Metrics
Fastball Velocity 94.1 +0.2 ↑ 93.9 -0.1 ↓ 94.0
Breaking Velocity 83.7 -0.8 ↓ 84.5 -1.7 ↓ 86.2
Offspeed Velocity 86.0 +0.1 ↑ 85.9 +0.8 ↑ 85.1
Batted Ball Results
Barrels 14 +6 ↑ 8 +7 ↑ 1
Popup % 8.5 -8.2 ↓ 16.7 +7.6 ↑ 9.1
Flyball % 32.1 -0.5 ↓ 32.6 +14.4 ↑ 18.2
Line Drive % 34.0 +12.0 ↑ 22.0 +3.8 ↑ 18.2
Groundball % 25.5 -3.3 ↓ 28.8 -25.7 ↓ 54.5
Pull % 28.3 +7.1 ↑ 21.2 +12.1 ↑ 9.1
Straight Away % 37.7 -5.5 ↓ 43.2 -11.3 ↓ 54.5
Opposite Field % 34.0 -1.6 ↓ 35.6 -0.8 ↓ 36.4
Weak Contact % 6.6 +1.3 ↑ 5.3 -3.8 ↓ 9.1
Pull Airball % 20.8 +7.9 ↑ 12.9 +3.8 ↑ 9.1
Topped Contact % 17.0 -1.2 ↓ 18.2 -9.1 ↓ 27.3
Under Contact % 28.3 -12.6 ↓ 40.9 +22.7 ↑ 18.2
Flare/Burner Contact % 27.4 +6.2 ↑ 21.2 -6.1 ↓ 27.3
Solid Contact % 7.5 -0.8 ↓ 8.3 -0.8 ↓ 9.1
HR/FB % 8.8 -0.5 ↓ 9.3 +9.3 ↑ 0.0
Popups 9 -13 ↓ 22 +21 ↑ 1
Flyballs 34 -9 ↓ 43 +41 ↑ 2
Line Drives 36 +7 ↑ 29 +27 ↑ 2
Groundballs 27 -11 ↓ 38 +32 ↑ 6
Plate Discipline
In Zone % 51.4 -2.8 ↓ 54.2 +7.2 ↑ 47.0
Out of Zone % 48.6 +2.8 ↑ 45.8 -7.2 ↓ 53.0
Edge % 38.4 -3.8 ↓ 42.2 -2.8 ↓ 45.0
Zone Swing % 71.2 +1.8 ↑ 69.4 +1.3 ↑ 68.1
Out of Zone Swing % 26.7 -2.5 ↓ 29.2 +2.8 ↑ 26.4
In Zone Contact % 84.8 +5.3 ↑ 79.5 -1.8 ↓ 81.3
Out of Zone Contact % 58.3 -10.9 ↓ 69.2 +4.9 ↑ 64.3
Whiff % 22.1 -1.1 ↓ 23.2 -0.7 ↓ 23.9
First Strike % 56.4 -9.9 ↓ 66.3 +18.5 ↑ 47.8
First Pitch Swing % 29.5 -4.2 ↓ 33.7 +16.3 ↑ 17.4
Swing % 49.5 -1.5 ↓ 51.0 +5.0 ↑ 46.0
Meatball Swing % 79.7 -0.3 ↓ 80.0 -10.0 ↓ 90.0
Meatball % 9.1 +0.7 ↑ 8.4 -1.6 ↓ 10.0
Zone Swing & Miss % 15.2 -5.3 ↓ 20.5 +1.7 ↑ 18.8
Out of Zone Swing & Miss % 41.7 +10.9 ↑ 30.8 -4.9 ↓ 35.7
In Zone 333 -88 ↓ 421 +374 ↑ 47
Out of Zone 315 -41 ↓ 356 +303 ↑ 53
Edge 249 -79 ↓ 328 +283 ↑ 45
In Zone Swings 237 -55 ↓ 292 +260 ↑ 32
Out of Zone Swings 84 -20 ↓ 104 +90 ↑ 14
In Zone Swing & Misses 36 -24 ↓ 60 +54 ↑ 6
Out of Zone Swing & Misses 35 +3 ↑ 32 +27 ↑ 5
Basic
Pitches 648 -129 ↓ 777 +677 ↑ 100
PA 156 -42 ↓ 198 +175 ↑ 23
AB 138 -34 ↓ 172 +155 ↑ 17
Hits 38 +3 ↑ 35 +34 ↑ 1
Singles 23 -1 ↓ 24 +23 ↑ 1
Doubles 12 +5 ↑ 7 +7 ↑ 0
Triples 0 0 0 0 0
Home Runs 3 -1 ↓ 4 +4 ↑ 0
Walks 16 -3 ↓ 19 +14 ↑ 5
Strikeouts 33 -12 ↓ 45 +39 ↑ 6
K% 21.2 -1.5 ↓ 22.7 -3.4 ↓ 26.1
BB% 10.3 +0.7 ↑ 9.6 -12.1 ↓ 21.7
HBP 1 -1 ↓ 2 +1 ↑ 1
Batted Balls 106 -26 ↓ 132 +121 ↑ 11
Fastball Percent 70.7 -7.8 ↓ 78.5 +8.5 ↑ 70.0
Offspeed Percent 9.7 -1.9 ↓ 11.6 -11.4 ↓ 23.0
Breaking Percent 19.6 +9.7 ↑ 9.9 +2.9 ↑ 7.0
Number of Fastballs 458 -152 ↓ 610 +540 ↑ 70
Number of Offspeed 63 -27 ↓ 90 +67 ↑ 23
Number of Breaking 127 +50 ↑ 77 +70 ↑ 7
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2021 Shifts 23 .357 15 3 20.0 8 5 62.5
2024 Shades 23 .219 13 0 0.0 10 0 0.0
2025 Shades 195 .266 104 1 1.0 91 39 42.9
2026 Shades 156 .344 74 0 0.0 82 24 29.3
! 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 %
2021 18 17.1 27.8% 0.0% 23 21.2 0.0% 4.3%
2024 23 15.6 26.1% 0.0% 20 18.8 0.0% 0.0%
2025 190 17.0 13.2% 0.0% 143 19.1 0.0% 2.1%
2026 144 18.1 2.1% 4.2% 120 20.0 0.0% 4.2%

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Pitch Distribution

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