P | Arizona Diamondbacks
Bats/Throws: R/R | 6' 0" 165 lbs | Age: 28
Draft: 2019 | Rd. 1C, No. 34, Arizona Diamondbacks | Ball State
W L ERA G GS SV IP SO WHIP
2022 3 0 1.48 4 4 0 24.1 24 1.11
2023 3 1 3.32 15 3 1 40.2 37 1.43
2025 0 1 3.00 3 0 1 3 0 2.33
3 Seasons 6 2 2.65 22 7 2 68 61 1.35
G W-L ERA IP SO WHIP
2022 4 3-0 1.48 24.1 24 1.11
2023 15 3-1 3.32 40.2 37 1.43
2025 3 0-1 3.00 3 0 2.33
3 Seasons 22 6-2 2.65 68 61 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
2022 24 369 66 5 7.6 5.1 88.9 107.9 3.2 30.3 .265 .414 .277 .326 .400 48.5 24.5 7.1 1.48 4.46
2023 25 674 118 16 13.6 9.2 92.0 113.8 11.9 33.9 .253 .505 .330 .356 .413 47.5 21.3 10.3 3.32 5.52
2025 27 53 10 0 0.0 0.0 89.7 112.0 6.0 50.0 .409 .517 .488 .471 .405 40.0 0.0 23.1 3.00 11.21
Player 1096 194 21 10.8 7.4 90.9 113.8 8.6 33.5 .264 .473 .319 .351 .408 47.4 21.4 9.8
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

Jameson relies on 4 pitches.
Sinker
(30.2%) ,
Slider
(26.4%) ,
Changeup
(24.5%) ,
Four Seamer
(18.9%) ,


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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 %
2022 56.1 43.9 18.2 24.2 1.5 42.4 36.4 21.2 24.2 19.7 12.1 18.2 16.7 9.1
2023 46.6 53.4 32.2 17.8 3.4 33.1 39.0 28.0 16.9 21.2 8.5 16.1 17.8 19.5
2025 40.0 60.0 10.0 50.0 0.0 10.0 70.0 20.0 0.0 30.0 10.0 10.0 40.0 10.0
Player 49.5 50.5 26.3 21.6 2.6 35.1 39.7 25.3 18.6 21.1 9.8 16.5 18.6 15.5
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
2022 7.6 42.4 12.1 27.3 3.0 7.6 5.1
2023 1.7 38.1 23.7 16.9 5.9 13.6 9.2
2025 10.0 20.0 10.0 40.0 20.0 0.0 0.0
Player 4.1 38.7 19.1 21.6 5.7 10.8 7.4
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

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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
2025 Changeup AZ R 13 90.2 30.9 -0.1 16.1ARM 0.6 2.8 1.3 16.1ARM 1.7
2025 Sinker AZ R 16 96.5 23.9 1.0 17.2ARM 0.8 5.6 1.8 17.2ARM 2.1
2025 4-Seam Fastball AZ R 10 98.3 14.1 -0.1 7.6ARM -1.4 14.3 -1.5 7.6ARM 0.0
2025 Slider AZ R 14 87.6 34.3 0.0 3.2GLV -0.2 1.7 0.0 3.2GLV -1.4
2023 4-Seam Fastball AZ R 182 97.0 13.5 0.7 6.7ARM -2.8 15.7 -0.1 6.7ARM -0.7
2023 Sinker AZ R 202 95.0 24.7 1.3 16.0ARM 0.5 5.7 2.0 16.0ARM 1.1
2023 Changeup AZ R 89 89.1 33.1 2.5 15.0ARM -0.5 1.4 4.0 15.0ARM 0.6
2023 Slider AZ R 176 85.4 37.6 1.7 8.8GLV 4.0 0.0 1.6 8.8GLV 3.8
2023 Curveball AZ R 25 80.8 46.3 -4.7 15.1GLV 6.4 -4.3 -5.6 15.1GLV 6.2
! 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 -1.0 0 16 30.2 3 .333 .333 .300 16.7 0.0 -- .207 .318 .225 33.3
2025 Slider -2.3 0 14 26.4 3 .000 .000 .467 50.0 0.0 0.0 .012 .026 .472 100.0
2025 Changeup 3.4 0 13 24.5 2 .000 .000 .000 20.0 0.0 0.0 .336 .346 .305 0.0
2025 4-Seam Fastball -20.3 -2 10 18.9 5 .750 1.250 .820 0.0 0.0 0.0 .695 .875 .689 50.0
2023 Sinker -1.1 -2 202 30.0 52 .362 .468 .396 22.9 7.7 20.0 .298 .543 .386 53.5
2023 4-Seam Fastball -2.1 -4 182 27.0 48 .279 .581 .396 16.5 16.7 13.8 .318 .766 .474 51.4
2023 Slider 0.6 1 176 26.1 46 .158 .316 .272 51.9 45.7 30.9 .151 .313 .268 38.9
2023 Changeup 2.2 2 89 13.2 22 .190 .190 .195 33.3 13.6 13.0 .189 .242 .209 38.9
2023 Curveball 1.5 0 25 3.7 6 .200 .200 .267 20.0 16.7 20.0 .320 .455 .390 25.0
! 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 13 90.2 85 17.1 2:00 2:45 -45
2025 4-Seam Fastball 10 98.3 91 15.9 1:00 1:00 0
2025 Sinker 16 96.5 89 18.8 1:45 2:30 -45
2025 Slider 14 87.6 16 4.4 8:00 9:00 -60
2023 Changeup 85 89.1 85 15.9 2:00 3:00 -60
2023 Curveball 25 80.8 53 17.2 7:30 8:15 -45
2023 4-Seam Fastball 181 97.0 89 16.7 1:15 12:45 30
2023 Sinker 199 95.0 87 17.4 1:30 2:30 -60
2023 Slider 175 85.4 29 9.9 8:00 8:45 -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
2022 98 369 3 2 -2 -1 3
2023 174 674 4 0 -5 -2 -3
2025 13 53 0 -1 -1 0 -2
Player 285 1,096 8 1 -7 8 -1
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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 %
2022 369 56.6 66.5 80.6 25.6 48.8 45.8 58.2 48.8 26.7 9.2 85.3
2023 674 50.4 61.2 81.7 30.5 46.1 44.4 52.9 46.0 30.0 7.1 62.5
2025 53 39.6 71.4 93.3 15.6 40.0 43.4 61.5 37.7 20.0 1.9 0.0
Player 1,096 52.0 63.5 81.8 28.1 46.6 44.8 55.1 46.5 28.4 7.6 71.1
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
2022 72 34 6
2023 83 34 3
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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 %
2022 23.47 2 1.8 0 1 2 0 0.0
2023 23.11 6 6.5 -1 2 3 4 66.7
Player 23.20 8 8.3 0 3 5 4 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.
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Expected Home Runs by Park

Adjusted
Year HR
2022 2 2 2 3 2 2 2 1 1 1 1 2 2 2 2 2 1 2 2 2 2 2 2 2 1 1 2 2 2 2 1
2023 6 6 6 7 6 6 6 6 6 6 6 8 7 7 7 6 7 6 7 7 7 7 8 8 6 6 6 6 7 6 5
Player 8 8 8 10 8 8 8 7 7 7 7 10 9 9 9 8 8 8 9 9 9 9 10 10 7 7 8 8 9 8 6
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

2023 +/-   2022
Results
BA .260 +.038 ↑ .222
xBA .253 -.012 ↓ .265
OBP .339 +.053 ↑ .286
xOBP .333 +.008 ↑ .325
SLG .416 +.083 ↑ .333
xSLG .505 +.091 ↑ .414
ISO .156 +.045 ↑ .111
xISO .252 +.103 ↑ .149
BABIP .304 +.023 ↑ .281
wOBA .330 +.053 ↑ .277
xwOBA .356 +.030 ↑ .326
wOBACON .375 +.048 ↑ .327
xwOBACON .413 +.013 ↑ .400
BACON .339 +.036 ↑ .303
xBACON .330 -.032 ↓ .362
Statcast Hit Metrics
Hard Hit % 47.5 -1.0 ↓ 48.5
Avg Exit Velocity 92.0 +3.1 ↑ 88.9
Launch Angle Sweet-Spot % 33.9 +3.6 ↑ 30.3
Barrel % 13.6 +6.0 ↑ 7.6
Avg Launch Angle 11.9 +8.7 ↑ 3.2
Statcast Bat Tracking
Bat Speed 0.0 -- --
Attack Angle 0° -- --
Ideal Attack Angle % 0.0 -- --
Attack Direction 0° -- --
Swing Path - Tilt 0° -- --
Swing Length 0.0 -- --
Statcast Pitch Metrics
Fastball Velocity 95.9 +0.7 ↑ 95.2
Breaking Velocity 84.8 +1.3 ↑ 83.5
Offspeed Velocity 89.1 +2.8 ↑ 86.3
Batted Ball Results
Barrels 16 +11 ↑ 5
Popup % 3.4 +1.9 ↑ 1.5
Flyball % 32.2 +14.0 ↑ 18.2
Line Drive % 17.8 -6.4 ↓ 24.2
Groundball % 46.6 -9.5 ↓ 56.1
Pull % 33.1 -9.3 ↓ 42.4
Straight Away % 39.0 +2.6 ↑ 36.4
Opposite Field % 28.0 +6.8 ↑ 21.2
Weak Contact % 1.7 -5.9 ↓ 7.6
Pull Airball % 16.1 -2.1 ↓ 18.2
Topped Contact % 38.1 -4.3 ↓ 42.4
Under Contact % 23.7 +11.6 ↑ 12.1
Flare/Burner Contact % 16.9 -10.4 ↓ 27.3
Solid Contact % 5.9 +2.9 ↑ 3.0
HR/FB % 15.8 -0.9 ↓ 16.7
Popups 4 +3 ↑ 1
Flyballs 38 +26 ↑ 12
Line Drives 21 +5 ↑ 16
Groundballs 55 +18 ↑ 37
Plate Discipline
In Zone % 50.4 -6.2 ↓ 56.6
Out of Zone % 49.6 +6.2 ↑ 43.4
Edge % 44.4 -1.4 ↓ 45.8
Zone Swing % 61.2 -5.3 ↓ 66.5
Out of Zone Swing % 30.5 +4.9 ↑ 25.6
In Zone Contact % 81.7 +1.1 ↑ 80.6
Out of Zone Contact % 46.1 -2.7 ↓ 48.8
Whiff % 30.0 +3.3 ↑ 26.7
First Strike % 52.9 -5.3 ↓ 58.2
First Pitch Swing % 24.7 -5.9 ↓ 30.6
Swing % 46.0 -2.8 ↓ 48.8
Meatball Swing % 62.5 -22.8 ↓ 85.3
Meatball % 7.1 -2.1 ↓ 9.2
Zone Swing & Miss % 18.3 -1.1 ↓ 19.4
Out of Zone Swing & Miss % 53.9 +2.7 ↑ 51.2
In Zone 340 +131 ↑ 209
Out of Zone 334 +174 ↑ 160
Edge 299 +130 ↑ 169
In Zone Swings 208 +69 ↑ 139
Out of Zone Swings 102 +61 ↑ 41
In Zone Swing & Misses 38 +11 ↑ 27
Out of Zone Swing & Misses 55 +34 ↑ 21
Basic
Pitches 674 +305 ↑ 369
PA 174 +76 ↑ 98
AB 154 +64 ↑ 90
Hits 40 +20 ↑ 20
Singles 28 +14 ↑ 14
Doubles 6 +2 ↑ 4
Triples 0 0 0
Home Runs 6 +4 ↑ 2
Walks 18 +11 ↑ 7
Strikeouts 37 +13 ↑ 24
K% 21.3 -3.2 ↓ 24.5
BB% 10.3 +3.2 ↑ 7.1
HBP 1 0 1
Batted Balls 118 +52 ↑ 66
Number of Fastballs 384 +154 ↑ 230
Number of Offspeed 89 +58 ↑ 31
Number of Breaking 201 +93 ↑ 108
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2022 Shifts 98 .277 46 3 6.5 52 34 65.4
2023 Shades 174 .330 91 1 1.1 83 40 48.2
2025 Shades 13 .488 5 1 20.0 8 2 25.0
! 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 %
2022 123 16.5 17.9% 0.0% 45 22.6 0.0% 4.4%
2023 203 15.0 49.3% 0.5% 118 19.8 0.0% 0.0%
2025 10 16.1 30.0% 0.0% 17 19.6 0.0% 0.0%

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Pitch Distribution

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