P | Boston Red Sox
Bats/Throws: R/R | 6' 2" 235 lbs | Age: 31
Draft: 2016 | Rd. 18, No. 548, New York Yankees | Fordham
W L ERA G GS SV IP SO WHIP
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
2026 0 1 9.64 5 0 0 4.2 8 1.50
5 Seasons 13 9 3.46 168 0 5 166.1 156 1.26
G W-L ERA IP SO WHIP
2024 62 4-2 3.13 63.1 58 1.34
2025 72 6-6 2.82 67 57 1.16
2026 5 0-1 9.64 4.2 8 1.50
5 Seasons 168 13-9 3.46 166.1 156 1.26
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
2022 27 186 30 1 3.3 2.1 83.9 105.1 16.8 30.0 .165 .310 .245 .275 .277 26.7 22.9 10.4 5.56 3.03
2023 28 347 56 4 7.1 4.6 91.1 110.6 11.1 28.6 .252 .411 .336 .326 .395 39.3 25.3 9.2 4.05 4.51
2024 29 1029 185 11 5.9 4.2 88.9 111.1 12.8 33.5 .246 .373 .310 .294 .352 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 .220 .371 .284 .289 .325 38.6 20.5 7.6 2.82 3.43
2026 31 93 11 3 27.3 14.3 95.8 109.6 9.0 54.5 .287 .686 .457 .435 .703 54.5 38.1 9.5 9.64 8.76
Player 2724 479 34 7.1 4.9 89.4 115.7 13.1 34.0 .233 .383 .303 .299 .350 39.0 22.4 8.0
MLB 7.2 4.9 88.6 122.9 12.4 33.3 .243 .408 .315 .316 .369 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.
Sinker
(41.9%) ,
Four Seamer
(19.4%) ,
Sweeper
(17.2%) ,
Slider
(10.8%) ,
Changeup
(8.6%) ,
Curveball
(2.2%) ,


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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
2026 36.4 63.6 45.5 18.2 0.0 45.5 27.3 27.3 18.2 9.1 9.1 27.3 18.2 18.2
Player 42.2 57.8 28.2 23.4 6.3 35.5 39.9 24.6 18.8 18.6 4.8 16.7 21.3 19.8
MLB 44.2 55.8 24.1 24.6 7.1 37.4 37.4 25.1 20.7 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
2026 0.0 27.3 9.1 27.3 9.1 27.3 14.3
Player 3.5 33.0 27.6 23.0 5.4 7.1 4.9
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
2026 Slider BOS R 10 85.5 33.9 -3.0 4.3GLV 0.8 3.7 -2.4 4.3GLV 0.2
2026 Curveball BOS R 2 80.9 48.7 -3.5 16.3GLV 3.6 -6.6 -3.8 16.3GLV 7.2
2026 Sinker BOS R 39 93.8 27.9 2.2 18.0ARM 1.3 3.6 4.1 18.0ARM 2.5
2026 4-Seam Fastball BOS R 18 93.7 17.9 -1.8 9.8ARM 0.3 13.6 -2.6 9.8ARM 2.1
2026 Sweeper BOS R 16 81.1 37.7 -1.2 20.6GLV 4.6 4.7 -3.4 20.6GLV 7.0
2026 Changeup BOS R 8 85.5 41.1 2.4 15.7ARM 0.4 -3.4 7.2 15.7ARM 1.0
2025 Slider BOS R 173 85.6 36.7 0.1 5.8GLV 0.3 0.6 1.2 5.8GLV 1.4
2025 Curveball BOS R 43 81.1 48.0 -0.5 17.3GLV 4.3 -6.1 -4.1 17.3GLV 8.3
2025 Changeup BOS R 104 86.0 38.9 1.4 14.2ARM -0.4 -1.8 5.9 14.2ARM -0.3
2025 Sinker BOS R 297 93.9 28.5 1.9 16.9ARM 0.3 2.8 4.6 16.9ARM 1.8
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 Sweeper BOS R 95 81.4 36.4 -2.2 20.1GLV 6.1 5.4 -4.4 20.1GLV 6.1
! 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 Sinker 2.2 1 39 41.9 9 .143 .143 .256 7.7 44.4 50.0 .222 .249 .316 33.3
2026 4-Seam Fastball -1.0 0 18 19.4 5 .200 .800 .400 33.3 40.0 18.2 .294 1.025 .542 66.7
2026 Sweeper 3.7 1 16 17.2 2 .000 .000 .000 40.0 50.0 16.7 .005 .011 .007 0.0
2026 Slider -9.4 -1 10 10.8 2 .500 2.000 1.000 0.0 0.0 0.0 .592 1.820 .997 50.0
2026 Changeup -25.0 -2 8 8.6 3 .667 1.667 .967 25.0 33.3 25.0 .412 .831 .522 100.0
2026 Curveball -2.5 0 2 2.2 -- -- -- -- -- 0.0 -- -- -- --
2025 4-Seam Fastball 1.5 5 357 33.4 109 .190 .330 .269 22.0 24.8 19.9 .161 .327 .246 39.7
2025 Sinker 1.1 3 297 27.8 75 .262 .338 .337 14.2 10.7 25.8 .284 .399 .348 40.4
2025 Slider 0.5 1 173 16.2 37 .281 .469 .349 27.8 10.8 28.6 .321 .538 .382 45.2
2025 Changeup 1.5 2 104 9.7 26 .160 .160 .165 31.9 30.8 19.5 .147 .163 .159 17.6
2025 Sweeper -4.9 -5 95 8.9 18 .412 .824 .531 21.9 33.3 20.7 .270 .548 .362 45.5
2025 Curveball 2.3 1 43 4.0 12 .083 .083 .075 35.3 33.3 12.9 .186 .324 .216 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
2026 4-Seam Fastball 18 93.7 79 16.3 1:30 1:15 15
2026 Sinker 37 93.8 79 19.1 1:45 2:45 -60
2026 Slider 10 85.5 36 5.6 9:45 10:00 -15
2026 Sweeper 16 81.1 66 21.8 8:30 9:15 -45
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
! 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
2026 21 93 0 0 -2 0 -2
Player 692 2,723 9 26 -17 9 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 %
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 52.8 64.1 84.8 30.7 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
2026 93 47.3 70.5 83.9 24.5 58.3 36.6 61.9 46.2 23.3 4.3 75.0
Player 2,724 51.2 65.1 83.0 26.9 64.8 41.4 56.4 46.4 22.1 7.7 77.0
MLB 48.8 67.0 82.5 28.4 58.0 42.7 61.1 47.3 25.0 7.4 76.3
! 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
2022 66 23 30
2023 52 26 35
2024 52 83 10 47 71 45 30 47 72 10 43 56 81 35 43 15
2025 70 82 27 69 75 44 45 36 23 26 33 59 62 64 49 7
2026 18 66 27 3 7 40 33 4 24 36 92 48 2 15 34 10
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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
2026 29.50 3 2.6 0 0 3 0 0.0
Player 24.69 20 18.9 1 7 17 5 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
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
2026 3 3 2 2 0 3 3 2 3 3 3 3 1 3 3 2 3 2 3 3 2 3 3 3 3 3 3 3 3 3 3
Player 20 18 21 17 14 21 21 18 15 15 19 20 18 21 20 14 20 17 21 24 19 19 25 21 18 17 18 20 20 19 16
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 +/-   2023 +/-   2022
Results
BA .263 +.036 .227 -.047 .274 +.001 .273 +.127 .146
xBA .287 +.067 .220 -.026 .246 -.006 .252 +.087 .165
OBP .333 +.041 .292 -.032 .324 -.025 .349 +.078 .271
xOBP .355 +.067 .288 -.014 .302 -.029 .331 +.042 .289
SLG .737 +.382 .355 -.046 .401 -.015 .416 +.172 .244
xSLG .686 +.315 .371 -.002 .373 -.038 .411 +.101 .310
ISO .474 +.347 .127 .000 .127 -.016 .143 +.045 .098
xISO .399 +.248 .151 +.024 .127 -.031 .158 +.013 .145
BABIP .250 -.018 .268 -.060 .328 -.018 .346 +.174 .172
wOBA .457 +.173 .284 -.026 .310 -.026 .336 +.091 .245
xwOBA .435 +.146 .289 -.005 .294 -.032 .326 +.051 .275
wOBAcon .744 +.426 .318 -.056 .374 -.037 .411 +.182 .229
xwOBAcon .703 +.378 .325 -.027 .352 -.043 .395 +.118 .277
BACON .455 +.164 .291 -.062 .353 -.029 .382 +.182 .200
xBACON .496 +.212 .284 -.038 .322 -.031 .353 +.125 .228
Statcast Hit Metrics
Hard Hit % 54.5 +15.9 38.6 -1.9 40.5 +1.2 39.3 +12.6 26.7
Avg Exit Velocity 95.8 +6.0 89.8 +0.9 88.9 -2.2 91.1 +7.2 83.9
Launch Angle Sweet-Spot % 54.5 +19.0 35.5 +2.0 33.5 +4.9 28.6 -1.4 30.0
Barrel % 27.3 +19.7 7.6 +1.7 5.9 -1.2 7.1 +3.8 3.3
Avg Launch Angle 9.0 -4.5 13.5 +0.7 12.8 +1.7 11.1 -5.7 16.8
Statcast Bat Tracking
Bat Speed 72.5 +1.0 71.5 +0.9 70.6 +0.1 70.5 -- --
Attack Angle 12° +3° -1° -- --
Ideal Attack Angle % 55.0 +4.0 51.0 +2.2 48.8 +1.7 47.1 -- --
Attack Direction -3° -3° -2° -- --
Swing Path - Tilt 33° 33° -1° 34° +2° 32° -- --
Swing Length 7.5 +0.3 7.2 0.0 7.2 +0.1 7.1 -- --
Statcast Pitch Metrics
Fastball Velocity 93.8 -0.2 94.0 +0.2 93.8 -0.1 93.9 -0.9 94.8
Breaking Velocity 82.7 -1.0 83.7 +2.9 80.8 +0.4 80.4 -1.4 81.8
Offspeed Velocity 85.5 -0.5 86.0 +1.4 84.6 +0.1 84.5 -0.7 85.2
Batted Ball Results
Barrels 3 -12 15 +4 11 +7 4 +3 1
Popup % 0.0 -7.6 7.6 +1.7 5.9 +2.3 3.6 -3.1 6.7
Flyball % 45.5 +17.6 27.9 -0.2 28.1 +3.1 25.0 -5.0 30.0
Line Drive % 18.2 -4.6 22.8 -2.1 24.9 +3.5 21.4 -1.9 23.3
Groundball % 36.4 -5.2 41.6 +0.5 41.1 -8.9 50.0 +10.0 40.0
Pull % 45.5 +8.4 37.1 +3.0 34.1 +0.2 33.9 +0.6 33.3
Straight Away % 27.3 -11.8 39.1 -2.0 41.1 -1.8 42.9 +6.2 36.7
Opposite Field % 27.3 +3.4 23.9 -1.0 24.9 +1.7 23.2 -6.8 30.0
Weak Contact % 0.0 -3.0 3.0 +0.3 2.7 -4.4 7.1 +0.4 6.7
Pull Airball % 27.3 +10.0 17.3 +0.5 16.8 +4.3 12.5 -4.2 16.7
Topped Contact % 27.3 -6.2 33.5 0.0 33.5 +1.4 32.1 +2.1 30.0
Under Contact % 9.1 -20.8 29.9 +1.8 28.1 +6.7 21.4 -5.3 26.7
Flare/Burner Contact % 27.3 +7.0 20.3 -4.6 24.9 -3.7 28.6 +11.9 16.7
Solid Contact % 9.1 +4.0 5.1 +0.2 4.9 +1.3 3.6 -9.7 13.3
HR/FB % 60.0 +49.1 10.9 -2.6 13.5 -7.9 21.4 +10.3 11.1
Popups 0 -15 15 +4 11 +9 2 0 2
Flyballs 5 -50 55 +3 52 +38 14 +5 9
Line Drives 2 -43 45 -1 46 +34 12 +5 7
Groundballs 4 -78 82 +6 76 +48 28 +16 12
Plate Discipline
In Zone % 47.3 -4.1 51.4 -1.4 52.8 +2.5 50.3 +5.1 45.2
Out of Zone % 52.7 +4.1 48.6 +1.4 47.2 -2.5 49.7 -5.1 54.8
Edge % 36.6 -5.3 41.9 -0.6 42.5 +3.5 39.0 -0.2 39.2
Zone Swing % 70.5 +4.4 66.1 +2.0 64.1 -1.4 65.5 +4.8 60.7
Out of Zone Swing % 24.5 -1.7 26.2 -4.5 30.7 +9.8 20.9 -3.6 24.5
In Zone Contact % 83.9 +1.5 82.4 -2.4 84.8 +8.5 76.3 -13.9 90.2
Out of Zone Contact % 58.3 -6.4 64.7 -3.1 67.8 +9.5 58.3 -1.7 60.0
Whiff % 23.3 +0.9 22.4 +2.1 20.3 -7.7 28.0 +8.3 19.7
First Strike % 61.9 +5.6 56.3 +0.1 56.2 -3.6 59.8 +9.8 50.0
First Pitch Swing % 23.8 0.0 23.8 -2.0 25.8 +4.0 21.8 +1.0 20.8
Swing % 46.2 -0.5 46.7 -1.6 48.3 +5.1 43.2 +2.3 40.9
Meatball Swing % 75.0 -2.0 77.0 +0.3 76.7 -2.6 79.3 +4.3 75.0
Meatball % 4.3 -2.6 6.9 -1.8 8.7 +0.3 8.4 +1.9 6.5
Zone Swing & Miss % 16.1 -1.5 17.6 +2.4 15.2 -8.5 23.7 +13.9 9.8
Out of Zone Swing & Miss % 41.7 +6.4 35.3 +3.1 32.2 -9.5 41.7 +1.7 40.0
In Zone 44 -505 549 +6 543 +369 174 +90 84
Out of Zone 49 -471 520 +34 486 +314 172 +70 102
Edge 34 -414 448 +11 437 +302 135 +62 73
In Zone Swings 31 -332 363 +15 348 +234 114 +63 51
Out of Zone Swings 12 -124 136 -13 149 +113 36 +11 25
In Zone Swing & Misses 5 -59 64 +11 53 +26 27 +22 5
Out of Zone Swing & Misses 5 -43 48 0 48 +33 15 +5 10
Basic
Pitches 93 -976 1,069 +40 1,029 +682 347 +161 186
PA 21 -257 278 +15 263 +176 87 +39 48
AB 19 -232 251 +14 237 +160 77 +36 41
Hits 5 -52 57 -8 65 +44 21 +15 6
Singles 2 -35 37 -12 49 +33 16 +12 4
Doubles 0 -14 14 +5 9 +7 2 +1 1
Triples 0 0 0 0 0 0 0 0 0
Home Runs 3 -3 6 -1 7 +4 3 +2 1
Walks 2 -19 21 +1 20 +12 8 +3 5
Strikeouts 8 -49 57 -1 58 +36 22 +11 11
K% 38.1 +17.6 20.5 -1.6 22.1 -3.2 25.3 +2.4 22.9
BB% 9.5 +1.9 7.6 0.0 7.6 -1.6 9.2 -1.2 10.4
HBP 0 -3 3 +3 0 -1 1 -1 2
Batted Balls 11 -186 197 +12 185 +129 56 +26 30
Number of Fastballs 57 -597 654 +75 579 +349 230 +131 99
Number of Offspeed 8 -96 104 +13 91 +70 21 +2 19
Number of Breaking 12 -204 216 +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
2026 Shades 21 .456 17 1 5.9 4 3 75.0
! 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 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%
2026 28 16.3 7.1% 0.0% 9 21.7 0.0% 0.0%

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Pitch Distribution