P | Boston Red Sox
Bats/Throws: R/R | 6' 2" 235 lbs | Age: 30
Draft: 2016 | Rd. 18, No. 548, New York Yankees | Fordham
W L ERA G GS SV IP SO WHIP
2023 0 0 4.05 17 0 0 20 22 1.45
2024 4 2 3.13 62 0 1 63.1 58 1.34
2025 6 6 2.82 72 0 4 67 57 1.16
4 Seasons 13 8 3.28 163 0 5 161.2 148 1.26
G W-L ERA IP SO WHIP
2023 17 0-0 4.05 20 22 1.45
2024 62 4-2 3.13 63.1 58 1.34
2025 72 6-6 2.82 67 57 1.16
4 Seasons 163 13-8 3.28 161.2 148 1.26
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 27 186 30 1 3.3 2.1 83.9 105.1 16.8 30.0 .163 .278 .245 .265 .261 26.7 22.9 10.4 5.56 2.87
2023 28 347 56 4 7.1 4.6 91.1 110.6 11.1 28.6 .251 .405 .336 .322 .390 39.3 25.3 9.2 4.05 4.39
2024 29 1029 185 11 5.9 4.2 88.9 111.1 12.8 33.5 .247 .366 .310 .290 .347 40.5 22.1 7.6 3.13 3.49
2025 30 1069 197 15 7.6 5.4 89.8 115.7 13.5 35.5 .222 .364 .284 .287 .323 38.6 20.5 7.6 2.82 3.41
Player 2631 468 31 6.6 4.6 89.2 115.7 13.2 33.5 .232 .364 .298 .291 .336 38.7 21.9 8.0
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

Weissert relies on 6 pitches.
Four Seamer
(33.4%) ,
Sinker
(27.8%) ,
Slider
(16.2%) ,
Changeup
(9.7%) ,
Sweeper
(8.9%) ,
Curveball
(4.0%) ,


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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 40.0 60.0 30.0 23.3 6.7 33.3 36.7 30.0 16.7 16.7 6.7 16.7 20.0 23.3
2023 50.0 50.0 25.0 21.4 3.6 33.9 42.9 23.2 21.4 19.6 8.9 12.5 23.2 14.3
2024 41.1 58.9 28.1 24.9 5.9 34.1 41.1 24.9 17.3 19.5 4.3 16.8 21.6 20.5
2025 41.6 58.4 27.9 22.8 7.6 37.1 39.1 23.9 19.8 18.3 3.6 17.3 20.8 20.3
Player 42.3 57.7 27.8 23.5 6.4 35.3 40.2 24.6 18.8 18.8 4.7 16.5 21.4 19.9
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
2022 6.7 30.0 26.7 16.7 13.3 3.3 2.1
2023 7.1 32.1 21.4 28.6 3.6 7.1 4.6
2024 2.7 33.5 28.1 24.9 4.9 5.9 4.2
2025 3.0 33.5 29.9 20.3 5.1 7.6 5.4
Player 3.6 33.1 28.0 22.9 5.3 6.6 4.6
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
2025 Slider BOS R 173 85.6 36.7 0.3 5.8GLV -0.1 0.6 1.1 5.8GLV 1.2
2025 Curveball BOS R 43 81.1 48.0 0.1 17.3GLV 4.3 -6.1 -3.8 17.3GLV 8.2
2025 Changeup BOS R 104 86.0 38.9 1.5 14.2ARM -0.4 -1.8 5.9 14.2ARM -0.2
2025 4-Seam Fastball BOS R 357 94.1 18.2 -1.3 8.6ARM -1.7 12.6 -3.2 8.6ARM 1.0
2025 Sinker BOS R 297 93.9 28.5 1.9 16.9ARM 0.3 2.8 4.6 16.9ARM 1.8
2025 Sweeper BOS R 95 81.4 36.4 -2.4 20.1GLV 6.3 5.4 -4.3 20.1GLV 6.2
2024 Sweeper BOS R 300 79.8 39.4 -0.6 20.3GLV 4.3 4.0 -2.5 20.3GLV 6.2
2024 Cutter BOS R 17 91.9 21.0 2.6 2.4ARM -3.0 11.2 2.9 2.4ARM -5.1
2024 Slider BOS R 59 85.5 36.7 0.2 6.4GLV 0.7 0.7 1.0 6.4GLV 1.6
2024 Sinker BOS R 342 93.7 27.6 1.5 17.0ARM 1.0 3.7 3.5 17.0ARM 2.1
2024 Changeup BOS R 91 84.6 39.1 1.8 17.9ARM 2.3 -0.7 5.6 17.9ARM 3.7
2024 4-Seam Fastball BOS R 220 94.0 17.7 -0.9 8.8ARM -0.9 13.2 -2.5 8.8ARM 1.2
! 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 4-Seam Fastball 1.5 5 357 33.4 109 .190 .330 .269 22.0 24.8 19.9 .163 .330 .248 39.7
2025 Sinker 1.1 3 297 27.8 75 .262 .338 .337 14.2 10.7 25.8 .286 .381 .344 40.4
2025 Slider 0.5 1 173 16.2 37 .281 .469 .349 27.8 10.8 28.6 .325 .534 .381 45.2
2025 Changeup 1.5 2 104 9.7 26 .160 .160 .165 31.9 30.8 19.5 .149 .166 .160 17.6
2025 Sweeper -4.9 -5 95 8.9 18 .412 .824 .531 21.9 33.3 20.7 .268 .505 .348 45.5
2025 Curveball 2.3 1 43 4.0 12 .083 .083 .075 35.3 33.3 12.9 .182 .304 .206 25.0
2024 Sinker 1.0 3 342 33.2 85 .342 .430 .365 11.4 10.6 24.3 .322 .461 .365 50.0
2024 Sweeper -1.6 -5 300 29.2 60 .320 .520 .400 27.9 18.3 13.1 .246 .367 .306 46.5
2024 4-Seam Fastball 1.5 3 220 21.4 71 .194 .313 .229 17.6 38.0 20.1 .188 .290 .218 35.7
2024 Changeup -0.7 -1 91 8.8 25 .261 .304 .286 35.6 20.0 12.8 .286 .379 .322 22.2
2024 Slider -0.9 -1 59 5.7 10 .300 .700 .415 10.7 20.0 14.3 .147 .344 .207 12.5
2024 Cutter 8.1 1 17 1.7 8 .000 .000 .000 50.0 50.0 57.1 .032 .041 .029 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 101 86.0 94 15.6 2:45 3:30 -45
2025 Curveball 43 81.1 79 20.1 8:15 8:15 0
2025 4-Seam Fastball 356 94.1 75 14.9 1:30 1:15 15
2025 Sinker 289 93.9 78 18.0 2:00 2:45 -45
2025 Slider 173 85.6 39 6.6 9:30 8:45 45
2025 Sweeper 95 81.4 68 21.5 8:45 9:15 -30
2024 Changeup 91 84.6 99 18.9 3:00 3:15 -15
2024 Cutter 17 91.9 59 10.7 1:15 12:30 45
2024 4-Seam Fastball 217 94.0 77 15.5 1:30 1:15 15
2024 Sinker 333 93.8 81 18.0 1:45 2:45 -60
2024 Slider 57 85.5 37 7.0 10:00 9:00 60
2024 Sweeper 298 79.8 73 21.5 8:30 9:15 -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 48 186 1 4 -3 -2 1
2023 87 346 4 0 -3 -2 -1
2024 259 1,029 0 10 -5 -3 2
2025 277 1,069 4 12 -5 -4 8
Player 671 2,630 9 26 -15 9 9
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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 186 45.2 60.7 90.2 24.5 60.0 39.2 50.0 40.9 19.7 6.5 75.0
2023 347 50.3 65.5 76.3 20.9 58.3 39.0 59.8 43.2 28.0 8.4 79.3
2024 1,029 52.7 64.1 84.8 30.5 67.8 42.5 56.2 48.3 20.3 8.7 76.7
2025 1,069 51.4 66.1 82.4 26.2 64.7 41.9 56.3 46.7 22.4 6.9 77.0
Player 2,631 51.3 64.9 83.0 27.0 65.0 41.6 56.3 46.4 22.1 7.8 77.1
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 66 23 30
2023 52 26 35
2024 71 36 66 82 61 77 81 47 35 43 56 10 70 45 30 15
2025 77 74 67 60 79 62 62 36 64 33 59 26 23 45 45 7
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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 26.07 1 1.0 0 0 1 0 0.0
2023 23.41 3 3.0 0 2 2 1 33.3
2024 22.43 7 5.8 1 3 5 2 28.6
2025 25.34 6 6.5 -1 2 6 2 33.3
Player 23.84 17 16.2 1 7 14 5 29.4
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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Expected Home Runs by Park

Adjusted

Year HR
2022 1 0 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
2023 3 2 5 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 3 4 4 3 2 2 3 2 3 3 2
2024 7 7 7 6 4 6 8 5 3 3 6 5 6 6 6 4 6 5 7 7 6 5 9 7 6 6 5 7 6 6 4
2025 6 6 6 6 6 8 6 7 5 5 6 8 7 8 7 4 7 6 6 9 7 6 8 7 6 5 6 7 7 6 6
Player 17 15 19 15 14 18 18 16 12 12 16 17 17 18 17 12 17 15 18 21 17 16 22 18 15 14 15 17 17 16 13
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 +/-   2023 +/-   2022
Results
BA .227 -.047 .274 +.001 .273 +.127 .146
xBA .222 -.025 .247 -.004 .251 +.088 .163
OBP .292 -.032 .324 -.025 .349 +.078 .271
xOBP .289 -.014 .303 -.026 .329 +.041 .288
SLG .355 -.046 .401 -.015 .416 +.172 .244
xSLG .364 -.002 .366 -.039 .405 +.127 .278
ISO .127 .000 .127 -.016 .143 +.045 .098
xISO .142 +.023 .119 -.036 .155 +.040 .115
BABIP .268 -.060 .328 -.018 .346 +.174 .172
wOBA .284 -.026 .310 -.026 .336 +.091 .245
xwOBA .287 -.003 .290 -.032 .322 +.057 .265
wOBACON .318 -.056 .374 -.037 .411 +.182 .229
xwOBACON .323 -.024 .347 -.043 .390 +.129 .261
BACON .291 -.062 .353 -.029 .382 +.182 .200
xBACON .286 -.037 .323 -.028 .351 +.126 .225
Statcast Hit Metrics
Hard Hit % 38.6 -1.9 40.5 +1.2 39.3 +12.6 26.7
Avg Exit Velocity 89.8 +0.9 88.9 -2.2 91.1 +7.2 83.9
Launch Angle Sweet-Spot % 35.5 +2.0 33.5 +4.9 28.6 -1.4 30.0
Barrel % 7.6 +1.7 5.9 -1.2 7.1 +3.8 3.3
Avg Launch Angle 13.5 +0.7 12.8 +1.7 11.1 -5.7 16.8
Statcast Bat Tracking
Bat Speed 71.5 +0.9 70.6 +0.1 70.5 -- --
Attack Angle -1° -- --
Ideal Attack Angle % 50.9 +2.1 48.8 +1.7 47.1 -- --
Attack Direction -2° -- --
Swing Path - Tilt 33° -1° 34° +2° 32° -- --
Swing Length 7.2 0.0 7.2 +0.1 7.1 -- --
Statcast Pitch Metrics
Fastball Velocity 94.0 +0.2 93.8 -0.1 93.9 -0.9 94.8
Breaking Velocity 83.7 +2.9 80.8 +0.4 80.4 -1.4 81.8
Offspeed Velocity 86.0 +1.4 84.6 +0.1 84.5 -0.7 85.2
Batted Ball Results
Barrels 15 +4 11 +7 4 +3 1
Popup % 7.6 +1.7 5.9 +2.3 3.6 -3.1 6.7
Flyball % 27.9 -0.2 28.1 +3.1 25.0 -5.0 30.0
Line Drive % 22.8 -2.1 24.9 +3.5 21.4 -1.9 23.3
Groundball % 41.6 +0.5 41.1 -8.9 50.0 +10.0 40.0
Pull % 37.1 +3.0 34.1 +0.2 33.9 +0.6 33.3
Straight Away % 39.1 -2.0 41.1 -1.8 42.9 +6.2 36.7
Opposite Field % 23.9 -1.0 24.9 +1.7 23.2 -6.8 30.0
Weak Contact % 3.0 +0.3 2.7 -4.4 7.1 +0.4 6.7
Pull Airball % 17.3 +0.5 16.8 +4.3 12.5 -4.2 16.7
Topped Contact % 33.5 0.0 33.5 +1.4 32.1 +2.1 30.0
Under Contact % 29.9 +1.8 28.1 +6.7 21.4 -5.3 26.7
Flare/Burner Contact % 20.3 -4.6 24.9 -3.7 28.6 +11.9 16.7
Solid Contact % 5.1 +0.2 4.9 +1.3 3.6 -9.7 13.3
HR/FB % 10.9 -2.6 13.5 -7.9 21.4 +10.3 11.1
Popups 15 +4 11 +9 2 0 2
Flyballs 55 +3 52 +38 14 +5 9
Line Drives 45 -1 46 +34 12 +5 7
Groundballs 82 +6 76 +48 28 +16 12
Plate Discipline
In Zone % 51.4 -1.3 52.7 +2.4 50.3 +5.1 45.2
Out of Zone % 48.6 +1.3 47.3 -2.4 49.7 -5.1 54.8
Edge % 41.9 -0.6 42.5 +3.5 39.0 -0.2 39.2
Zone Swing % 66.1 +2.0 64.1 -1.4 65.5 +4.8 60.7
Out of Zone Swing % 26.2 -4.3 30.5 +9.6 20.9 -3.6 24.5
In Zone Contact % 82.4 -2.4 84.8 +8.5 76.3 -13.9 90.2
Out of Zone Contact % 64.7 -3.1 67.8 +9.5 58.3 -1.7 60.0
Whiff % 22.4 +2.1 20.3 -7.7 28.0 +8.3 19.7
First Strike % 56.3 +0.1 56.2 -3.6 59.8 +9.8 50.0
First Pitch Swing % 23.8 -2.0 25.8 +4.0 21.8 +1.0 20.8
Swing % 46.7 -1.6 48.3 +5.1 43.2 +2.3 40.9
Meatball Swing % 77.0 +0.3 76.7 -2.6 79.3 +4.3 75.0
Meatball % 6.9 -1.8 8.7 +0.3 8.4 +1.9 6.5
Zone Swing & Miss % 17.6 +2.4 15.2 -8.5 23.7 +13.9 9.8
Out of Zone Swing & Miss % 35.3 +3.1 32.2 -9.5 41.7 +1.7 40.0
In Zone 549 +6 543 +369 174 +90 84
Out of Zone 520 +32 488 +316 172 +70 102
Edge 448 +10 438 +303 135 +62 73
In Zone Swings 363 +15 348 +234 114 +63 51
Out of Zone Swings 136 -13 149 +113 36 +11 25
In Zone Swing & Misses 64 +11 53 +26 27 +22 5
Out of Zone Swing & Misses 48 0 48 +33 15 +5 10
Basic
Pitches 1,069 +40 1,029 +682 347 +161 186
PA 278 +15 263 +176 87 +39 48
AB 251 +14 237 +160 77 +36 41
Hits 57 -8 65 +44 21 +15 6
Singles 37 -12 49 +33 16 +12 4
Doubles 14 +5 9 +7 2 +1 1
Triples 0 0 0 0 0 0 0
Home Runs 6 -1 7 +4 3 +2 1
Walks 21 +1 20 +12 8 +3 5
Strikeouts 57 -1 58 +36 22 +11 11
K% 20.5 -1.6 22.1 -3.2 25.3 +2.4 22.9
BB% 7.6 0.0 7.6 -1.6 9.2 -1.2 10.4
HBP 3 +3 0 -1 1 -1 2
Batted Balls 197 +12 185 +129 56 +26 30
Number of Fastballs 654 +75 579 +349 230 +131 99
Number of Offspeed 104 +13 91 +70 21 +2 19
Number of Breaking 216 +157 59 +59 0 0 0
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2022 Shifts 48 .245 31 4 12.9 17 8 47.1
2023 Shades 87 .336 54 0 0.0 33 15 45.5
2024 Shades 259 .310 150 17 11.3 109 58 53.2
2025 Shades 277 .284 165 7 4.2 112 69 61.6
! 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 43 21.2 0.0% 4.7% 52 23.8 0.0% 5.8%
2023 106 17.1 9.4% 0.0% 61 19.5 0.0% 1.6%
2024 248 16.7 12.1% 0.0% 211 18.9 0.9% 0.9%
2025 241 16.8 10.4% 0.0% 237 19.5 0.4% 0.0%

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Pitch Distribution