P | Pittsburgh Pirates
Bats/Throws: R/R | 6' 2" 215 lbs | Age: 30
Draft: 2017 | Rd. 19, No. 565, Los Angeles Angels | Pittsburgh
W L ERA G GS SV IP SO WHIP
2021 0 0 6.23 4 0 0 4.1 3 2.31
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
3 Seasons 3 3 2.98 51 0 0 57.1 54 1.22
G W-L ERA IP SO WHIP
2021 4 0-0 6.23 4.1 3 2.31
2024 3 0-0 5.06 5.1 6 1.13
2025 44 3-3 2.45 47.2 45 1.13
3 Seasons 51 3-3 2.98 57.1 54 1.22
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 .226 .532 .357 .397 .378 46.7 13.0 21.7 6.23 7.26
2024 28 100 11 1 9.1 4.3 83.3 104.3 6.8 36.4 .224 .329 .219 .359 .371 27.3 26.1 21.7 5.06 5.60
2025 29 777 132 8 6.1 4.0 89.4 112.3 23.8 33.3 .211 .353 .264 .282 .319 39.4 22.7 9.6 2.46 3.28
Player 968 158 11 7.0 4.5 89.1 112.3 22.8 32.9 .213 .367 .269 .300 .328 39.2 22.1 11.9
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

Mattson relies on 4 pitches.
Four Seamer
(78.5%) ,
Changeup
(11.7%) ,
Slider
(8.9%) ,
Curveball
(0.9%) ,


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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
Player 31.0 69.0 33.5 20.3 15.2 20.3 43.0 36.7 8.2 16.5 6.3 12.0 26.6 30.4
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 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
Player 5.1 19.0 39.2 20.9 8.9 7.0 4.5
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 PIT R 91 86.0 28.3 -3.9 11.4ARM -2.9 8.7 -4.6 11.4ARM -3.0
2025 Curveball PIT R 7 78.8 51.0 -4.1 4.7GLV -4.0 -7.0 -2.9 4.7GLV -4.4
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 Slider PIT R 69 85.0 32.5 -3.5 3.1GLV -1.2 5.2 -3.5 3.1GLV -1.5
2024 4-Seam Fastball PIT R 70 94.0 11.8 3.0 9.5ARM 2.4 19.3 3.6 9.5ARM 1.9
2024 Changeup PIT R 23 85.1 28.8 -2.9 12.2ARM -2.0 9.1 -4.2 12.2ARM -2.0
2024 Slider PIT R 7 86.2 30.2 -4.9 0.9GLV -3.5 6.5 -4.8 0.9GLV -3.9
! 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 4-Seam Fastball 1.3 8 610 78.5 138 .191 .287 .267 23.1 25.4 19.1 .207 .332 .288 40.0
2025 Changeup -2.5 -2 91 11.7 33 .281 .406 .338 19.6 12.1 10.5 .271 .445 .316 42.9
2025 Slider 2.1 1 69 8.9 24 .167 .333 .210 29.7 20.8 18.5 .159 .351 .215 31.6
2025 Curveball 0.9 0 7 0.9 -- -- -- -- -- -- -- -- -- --
2024 4-Seam Fastball 1.0 1 70 70.0 18 .083 .083 .283 15.6 22.2 18.2 .243 .288 .389 25.0
2024 Changeup 4.8 1 23 23.0 5 .000 .000 .000 42.9 40.0 28.6 .180 .426 .256 33.3
2024 Slider -6.1 0 7 7.0 -- -- -- -- -- 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 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 67 84.9 41 6.2 11:30 10:45 45
2024 Changeup 23 85.1 94 15.2 1:45 2:00 -15
2024 4-Seam Fastball 70 94.0 99 21.3 1:00 1:00 0
! 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
Player 241 968 11 11 -11 11 8
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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 48.0 66.7 81.3 26.9 64.3 45.0 47.8 46.0 23.9 10.0 90.0
2025 777 54.2 69.2 79.5 29.2 69.2 42.2 66.3 51.0 23.2 8.4 80.0
Player 968 52.5 69.2 79.8 28.5 67.9 41.7 63.2 49.9 23.4 8.3 80.0
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 36 57 84
2024 50 77 70
2025 43 74 77
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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
Player 21.04 4 4.2 0 3 4 1 25.0
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.
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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
Player 4 4 2 4 3 4 4 6 3 3 4 5 5 5 4 5 4 3 4 5 5 4 5 4 4 2 5 5 5 5 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.
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Year to Year Changes

2025 +/-   2024
Results
BA .203 +.144 .059
xBA .211 -.013 .224
OBP .286 -.018 .304
xOBP .292 -.135 .427
SLG .314 +.255 .059
xSLG .353 +.024 .329
ISO .110 +.110 .000
xISO .143 +.039 .104
BABIP .246 +.155 .091
wOBA .264 +.045 .219
xwOBA .282 -.077 .359
wOBACON .293 +.213 .080
xwOBACON .319 -.052 .371
BACON .269 +.178 .091
xBACON .279 -.068 .347
Statcast Hit Metrics
Hard Hit % 39.4 +12.1 27.3
Avg Exit Velocity 89.4 +6.1 83.3
Launch Angle Sweet-Spot % 33.3 -3.1 36.4
Barrel % 6.1 -3.0 9.1
Avg Launch Angle 23.8 +17.0 6.8
Statcast Bat Tracking
Bat Speed 70.7 +1.6 69.1
Attack Angle
Ideal Attack Angle % 45.4 +7.9 37.5
Attack Direction
Swing Path - Tilt 31° +1° 31°
Swing Length 6.9 -0.2 7.1
Statcast Pitch Metrics
Fastball Velocity 93.9 -0.1 94.0
Breaking Velocity 84.5 -1.7 86.2
Offspeed Velocity 86.0 +0.9 85.1
Batted Ball Results
Barrels 8 +7 1
Popup % 16.7 +7.6 9.1
Flyball % 32.6 +14.4 18.2
Line Drive % 22.0 +3.8 18.2
Groundball % 28.8 -25.7 54.5
Pull % 21.2 +12.1 9.1
Straight Away % 43.2 -11.3 54.5
Opposite Field % 35.6 -0.8 36.4
Weak Contact % 5.3 -3.8 9.1
Pull Airball % 12.9 +3.8 9.1
Topped Contact % 18.2 -9.1 27.3
Under Contact % 40.9 +22.7 18.2
Flare/Burner Contact % 21.2 -6.1 27.3
Solid Contact % 8.3 -0.8 9.1
HR/FB % 9.3 +9.3 0.0
Popups 22 +21 1
Flyballs 43 +41 2
Line Drives 29 +27 2
Groundballs 38 +32 6
Plate Discipline
In Zone % 54.2 +6.2 48.0
Out of Zone % 45.8 -6.2 52.0
Edge % 42.2 -2.8 45.0
Zone Swing % 69.2 +2.5 66.7
Out of Zone Swing % 29.2 +2.3 26.9
In Zone Contact % 79.5 -1.8 81.3
Out of Zone Contact % 69.2 +4.9 64.3
Whiff % 23.2 -0.7 23.9
First Strike % 66.3 +18.5 47.8
First Pitch Swing % 33.7 +16.3 17.4
Swing % 51.0 +5.0 46.0
Meatball Swing % 80.0 -10.0 90.0
Meatball % 8.4 -1.6 10.0
Zone Swing & Miss % 20.5 +1.7 18.8
Out of Zone Swing & Miss % 30.8 -4.9 35.7
In Zone 422 +374 48
Out of Zone 356 +304 52
Edge 328 +283 45
In Zone Swings 292 +260 32
Out of Zone Swings 104 +90 14
In Zone Swing & Misses 60 +54 6
Out of Zone Swing & Misses 32 +27 5
Basic
Pitches 777 +677 100
PA 198 +175 23
AB 172 +155 17
Hits 35 +34 1
Singles 24 +23 1
Doubles 7 +7 0
Triples 0 0 0
Home Runs 4 +4 0
Walks 19 +14 5
Strikeouts 45 +39 6
K% 22.7 -3.4 26.1
BB% 9.6 -12.1 21.7
HBP 2 +1 1
Batted Balls 132 +121 11
Number of Fastballs 610 +540 70
Number of Offspeed 91 +68 23
Number of Breaking 76 +69 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
! 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%

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Pitch Distribution