P | Houston Astros
Bats/Throws: R/R | 6' 2" 210 lbs | Age: 27
Draft: 2017 | Rd. 6, No. 178, Pittsburgh Pirates | Tracy (CA) HS
W L ERA G GS SV IP SO WHIP
2024 0 0 4.34 17 0 0 18.2 17 1.45
2025 0 0 13.50 1 0 0 2 1 2.00
2026 0 1 4.63 5 3 1 11.2 14 1.80
4 Seasons 1 1 5.53 39 3 1 53.2 54 1.81
G W-L ERA IP SO WHIP
2024 17 0-0 4.34 18.2 17 1.45
2025 1 0-0 13.50 2 1 2.00
2026 5 0-1 4.63 11.2 14 1.80
4 Seasons 39 1-1 5.53 53.2 54 1.81
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
2023 25 455 69 7 10.3 6.5 92.6 111.1 8.8 42.0 .295 .497 .414 .391 .446 43.5 20.6 14.0 6.33 6.90
2024 26 312 57 4 7.0 4.8 87.0 113.4 15.1 33.3 .232 .388 .330 .310 .343 35.1 20.5 10.8 4.34 3.91
2025 27 40 9 1 11.1 10.0 91.3 107.2 12.7 33.3 .360 .532 .390 .382 .425 44.4 10.0 0.0 13.50 6.43
2026 28 234 32 3 9.4 5.4 90.1 110.5 13.6 43.8 .280 .472 .361 .392 .467 43.8 25.0 16.1 4.63 6.55
Player 1041 167 15 9.0 5.9 90.1 113.4 12.1 38.9 .273 .457 .374 .364 .413 40.7 21.1 12.9
MLB 7.6 4.9 88.6 122.9 12.5 33.3 .243 .408 .316 .316 .369 37.0 22.2 8.4
! Note: All figures in this table cover the period 2015-present.

Statcast Pitch Arsenal

Bolton relies on 6 pitches.
Four Seamer
(29.9%) ,
Cutter
(21.8%) ,
Sinker
(15.4%) ,
Curveball
(14.5%) ,
Changeup
(9.8%) ,
Sweeper
(8.5%) ,


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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 %
2023 39.1 60.9 21.7 37.7 1.4 40.6 39.1 20.3 18.8 11.6 8.7 21.7 27.5 11.6
2024 42.1 57.9 21.1 21.1 15.8 36.8 35.1 28.1 12.3 19.3 10.5 24.6 15.8 17.5
2025 33.3 66.7 11.1 44.4 11.1 22.2 44.4 33.3 11.1 11.1 11.1 11.1 33.3 22.2
2026 40.6 59.4 25.0 28.1 6.3 31.3 46.9 21.9 18.8 12.5 9.4 12.5 34.4 12.5
Player 40.1 59.9 21.6 30.5 7.8 36.5 39.5 24.0 16.2 14.4 9.6 20.4 25.1 14.4
MLB 44.2 55.8 24.1 24.6 7.1 37.4 37.3 25.1 20.7 17.6 5.9 16.8 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
2023 2.9 29.0 14.5 36.2 5.8 10.3 6.5
2024 3.5 33.3 29.8 19.3 7.0 7.0 4.8
2025 0.0 22.2 33.3 33.3 0.0 11.1 10.0
2026 9.4 21.9 18.8 31.3 9.4 9.4 5.4
Player 4.2 28.7 21.6 29.3 6.6 9.0 5.9
MLB 4.0 32.4 24.9 24.4 5.9 7.6 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 Sinker HOU R 36 94.5 22.6 -0.2 15.0ARM -1.0 8.2 -0.4 15.0ARM -0.5
2026 Changeup HOU R 23 89.4 33.9 2.4 14.3ARM -1.0 0.5 3.5 14.3ARM -0.4
2026 4-Seam Fastball HOU R 70 94.5 16.6 -1.8 4.8ARM -3.3 14.0 -2.1 4.8ARM -2.9
2026 Cutter HOU R 51 90.5 28.1 -3.0 5.4GLV 3.8 5.1 -3.1 5.4GLV 3.1
2026 Curveball HOU R 34 78.8 56.4 0.9 14.1GLV 4.0 -11.8 1.5 14.1GLV 4.9
2026 Sweeper HOU R 20 81.0 42.5 1.9 16.4GLV 1.7 -0.4 1.6 16.4GLV 2.4
2025 Sinker CLE R 19 93.9 21.7 -1.4 13.9ARM -1.5 9.4 -2.0 13.9ARM -1.2
2025 Cutter CLE R 3 88.9 34.9 -8.4 7.0GLV 5.0 -0.4 -8.8 7.0GLV 4.8
2025 4-Seam Fastball CLE R 3 94.4 15.6 -0.5 6.4ARM -1.2 15.1 -0.7 6.4ARM -1.2
2025 Sweeper CLE R 15 82.9 37.9 -1.4 14.2GLV 0.5 2.0 -1.1 14.2GLV 0.3
! 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 -2.8 -2 70 29.9 17 .417 .500 .478 18.5 29.4 17.9 .351 .647 .492 37.5
2026 Cutter -0.4 0 51 21.8 15 .182 .182 .307 12.5 26.7 36.4 .228 .288 .352 28.6
2026 Sinker -2.2 -1 36 15.4 9 .375 .750 .500 5.3 11.1 12.5 .308 .458 .371 42.9
2026 Curveball 2.3 1 34 14.5 10 .222 .333 .285 0.0 20.0 14.3 .298 .598 .410 57.1
2026 Changeup -0.2 0 23 9.8 1 .000 .000 .000 57.1 0.0 0.0 .431 .781 .510 100.0
2026 Sweeper 4.8 1 20 8.5 4 .000 .000 .000 45.5 50.0 33.3 .003 .004 .090 50.0
2025 Sinker -0.2 0 19 47.5 3 .333 .333 .300 0.0 0.0 0.0 .445 .518 .420 33.3
2025 Sweeper -2.3 0 15 37.5 5 .400 .600 .430 20.0 20.0 12.5 .314 .599 .384 50.0
2025 Cutter 9.5 0 3 7.5 1 .000 .000 .000 0.0 0.0 -- .060 .064 .059 0.0
2025 4-Seam Fastball -21.7 -1 3 7.5 1 1.000 1.000 .900 0.0 0.0 -- .635 .701 .582 100.0
! 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 18 89.5 74 15.1 1:45 3:00 -75
2026 Curveball 34 78.8 88 20.9 7:45 7:30 15
2026 Cutter 51 90.5 36 7.4 11:30 10:15 75
2026 4-Seam Fastball 70 94.5 82 14.4 1:00 12:45 15
2026 Sinker 36 94.5 80 17.3 1:15 2:15 -60
2026 Sweeper 20 81.0 68 17.6 8:00 8:45 -45
2025 Sinker 18 94.0 75 16.8 1:00 2:00 -60
2025 Sweeper 15 82.9 60 15.0 8:15 9:00 -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
2023 107 455 0 0 -6 -2 -8
2024 83 312 -1 2 -2 -1 -3
2025 10 40 -1 0 0 0 -1
2026 56 234 2 0 -2 -1 -1
Player 256 1,041 -1 3 -10 -1 -13
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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 %
2023 455 44.2 69.7 85.0 19.3 53.1 44.2 50.5 41.5 23.3 7.3 90.9
2024 312 44.9 58.6 84.1 29.7 60.8 43.3 66.3 42.6 24.8 6.1 63.2
2025 40 60.0 66.7 93.8 25.0 75.0 47.5 60.0 50.0 10.0 7.5 66.7
2026 234 46.6 56.9 93.5 21.6 51.9 45.7 48.2 38.0 19.1 6.0 85.7
Player 1,041 45.5 63.3 87.0 23.1 56.5 44.4 55.5 41.4 22.3 6.6 81.2
MLB 48.8 67.0 82.6 28.5 58.0 42.7 61.1 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
2023 71 80 49
2024 61 55 51
2025
2026 37 17 77 44 6 53 55 32 4 14 67 6 36 29 41 25
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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 %
2023 23.69 3 3.4 0 2 2 2 66.7
2024 23.46 3 2.9 0 1 2 1 33.3
2026 24.46 1 1.1 0 2 1 0 0.0
Player 23.70 7 7.4 0 5 5 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
2023 3 4 2 3 3 3 3 4 3 3 3 5 4 3 4 3 4 4 3 3 4 3 4 3 3 3 3 4 4 3 3
2024 3 2 3 4 3 3 3 3 2 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 3 2
2026 1 3 0 0 0 2 1 1 0 1 1 1 1 2 2 1 1 0 1 3 1 1 2 2 0 0 1 1 2 0 2
Player 7 9 5 7 6 8 7 8 5 7 7 9 8 8 9 7 8 7 7 9 8 7 9 8 6 6 7 8 9 6 7
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
Results
BA .273 -.127 .400 +.153 .247 -.086 .333
xBA .280 -.080 .360 +.128 .232 -.063 .295
OBP .400 .000 .400 +.075 .325 -.109 .434
xOBP .412 +.052 .360 +.046 .314 -.088 .402
SLG .386 -.114 .500 +.062 .438 -.084 .522
xSLG .472 -.060 .532 +.144 .388 -.109 .497
ISO .114 +.014 .100 -.092 .192 +.003 .189
xISO .193 +.021 .172 +.016 .156 -.047 .203
BABIP .367 -.077 .444 +.166 .278 -.137 .415
wOBA .361 -.029 .390 +.060 .330 -.084 .414
xwOBA .392 +.010 .382 +.072 .310 -.081 .391
wOBAcon .411 -.022 .433 +.061 .372 -.109 .481
xwOBAcon .467 +.042 .425 +.082 .343 -.103 .446
BACON .387 -.057 .444 +.128 .316 -.125 .441
xBACON .408 +.008 .400 +.100 .300 -.092 .392
Statcast Hit Metrics
Hard Hit % 43.8 -0.6 44.4 +9.3 35.1 -8.4 43.5
Avg Exit Velocity 90.1 -1.2 91.3 +4.3 87.0 -5.6 92.6
Launch Angle Sweet-Spot % 43.8 +10.5 33.3 0.0 33.3 -8.7 42.0
Barrel % 9.4 -1.7 11.1 +4.1 7.0 -3.3 10.3
Avg Launch Angle 13.6 +0.9 12.7 -2.4 15.1 +6.3 8.8
Statcast Bat Tracking
Bat Speed 72.4 +0.3 72.1 +0.3 71.8 +2.0 69.8
Attack Angle -5° 11° +3° +2°
Ideal Attack Angle % 50.0 -3.8 53.8 -1.8 55.6 +1.6 54.0
Attack Direction +4° -3°
Swing Path - Tilt 31° -2° 33° -1° 34° +2° 33°
Swing Length 7.1 -0.2 7.3 0.0 7.3 +0.2 7.1
Statcast Pitch Metrics
Fastball Velocity 93.2 -0.2 93.4 +1.5 91.9 -3.3 95.2
Breaking Velocity 79.6 -3.3 82.9 -0.8 83.7 +0.1 83.6
Offspeed Velocity 89.4 -- -- -- 91.5 -0.2 91.7
Batted Ball Results
Barrels 3 +2 1 -3 4 -3 7
Popup % 6.3 -4.8 11.1 -4.7 15.8 +14.4 1.4
Flyball % 25.0 +13.9 11.1 -10.0 21.1 -0.6 21.7
Line Drive % 28.1 -16.3 44.4 +23.3 21.1 -16.6 37.7
Groundball % 40.6 +7.3 33.3 -8.8 42.1 +3.0 39.1
Pull % 31.3 +9.1 22.2 -14.6 36.8 -3.8 40.6
Straight Away % 46.9 +2.5 44.4 +9.3 35.1 -4.0 39.1
Opposite Field % 21.9 -11.4 33.3 +5.2 28.1 +7.8 20.3
Weak Contact % 9.4 +9.4 0.0 -3.5 3.5 +0.6 2.9
Pull Airball % 12.5 +1.4 11.1 -13.5 24.6 +2.9 21.7
Topped Contact % 21.9 -0.3 22.2 -11.1 33.3 +4.3 29.0
Under Contact % 18.8 -14.5 33.3 +3.5 29.8 +15.3 14.5
Flare/Burner Contact % 31.3 -2.0 33.3 +14.0 19.3 -16.9 36.2
Solid Contact % 9.4 +9.4 0.0 -7.0 7.0 +1.2 5.8
HR/FB % 12.5 +12.5 0.0 -25.0 25.0 +5.0 20.0
Popups 2 +1 1 -8 9 +8 1
Flyballs 8 +7 1 -11 12 -3 15
Line Drives 9 +5 4 -8 12 -14 26
Groundballs 13 +10 3 -21 24 -3 27
Plate Discipline
In Zone % 46.6 -13.4 60.0 +15.1 44.9 +0.7 44.2
Out of Zone % 53.4 +13.4 40.0 -15.1 55.1 -0.7 55.8
Edge % 45.7 -1.8 47.5 +4.2 43.3 -0.9 44.2
Zone Swing % 56.9 -9.8 66.7 +8.1 58.6 -11.1 69.7
Out of Zone Swing % 21.6 -3.4 25.0 -4.7 29.7 +10.4 19.3
In Zone Contact % 93.5 -0.3 93.8 +9.7 84.1 -0.9 85.0
Out of Zone Contact % 51.9 -23.1 75.0 +14.2 60.8 +7.7 53.1
Whiff % 19.1 +9.1 10.0 -14.8 24.8 +1.5 23.3
First Strike % 48.2 -11.8 60.0 -6.3 66.3 +15.8 50.5
First Pitch Swing % 19.6 -20.4 40.0 +8.7 31.3 +11.7 19.6
Swing % 38.0 -12.0 50.0 +7.4 42.6 +1.1 41.5
Meatball Swing % 85.7 +19.0 66.7 +3.5 63.2 -27.7 90.9
Meatball % 6.0 -1.5 7.5 +1.4 6.1 -1.2 7.3
Zone Swing & Miss % 6.5 +0.2 6.3 -9.6 15.9 +0.9 15.0
Out of Zone Swing & Miss % 48.1 +23.1 25.0 -14.2 39.2 -7.7 46.9
In Zone 109 +85 24 -116 140 -61 201
Out of Zone 125 +109 16 -156 172 -82 254
Edge 107 +88 19 -116 135 -66 201
In Zone Swings 62 +46 16 -66 82 -58 140
Out of Zone Swings 27 +23 4 -47 51 +2 49
In Zone Swing & Misses 4 +3 1 -12 13 -8 21
Out of Zone Swing & Misses 13 +12 1 -19 20 -3 23
Basic
Pitches 234 +194 40 -272 312 -143 455
PA 56 +46 10 -73 83 -24 107
AB 44 +34 10 -63 73 -17 90
Hits 12 +8 4 -14 18 -12 30
Singles 9 +6 3 -8 11 -8 19
Doubles 2 +1 1 -2 3 -5 8
Triples 0 0 0 -1 1 +1 0
Home Runs 1 +1 0 -3 3 0 3
Walks 9 +9 0 -9 9 -6 15
Strikeouts 14 +13 1 -16 17 -5 22
K% 25.0 +15.0 10.0 -10.5 20.5 -0.1 20.6
BB% 16.1 +16.1 0.0 -10.8 10.8 -3.2 14.0
HBP 1 +1 0 0 0 -1 1
Batted Balls 32 +23 9 -48 57 -12 69
Number of Fastballs 157 +132 25 -173 198 -51 249
Number of Offspeed 23 +23 0 -37 37 -38 75
Number of Breaking 54 +39 15 -62 77 -54 131
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Statcast Fielder Positioning

vs RHHvs LHH
YearAlignment TypePAwOBAPATotal%PATotal%
2023 Shades 107 .414 61 7 11.5 46 28 60.9
2024 Shades 83 .330 43 4 9.3 40 28 70.0
2025 Shades 10 .390 7 0 0.0 3 3 100.0
2026 Shades 56 .361 22 2 9.1 34 26 76.5
! 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 %
2023 110 13.7 70.0% 0.0% 111 16.6 25.2% 0.9%
2024 85 15.6 37.6% 0.0% 62 18.2 6.5% 3.2%
2025 6 16.4 33.3% 0.0% 14 18.7 0.0% 0.0%
2026 41 14.2 68.3% 0.0% 47 18.5 6.4% 0.0%

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Pitch Distribution