83
Velocity (max)
2/18/23
CLASS OF 2025
RHP
3B
Jack
Welak
Catholic Memorial (HS) • WI
5' 10" • 165LBS
R/R • 17yr 6mo
Travel Team: GRB/Stixs
5' 10" • 165LBS
R/R • 17yr 6mo
Travel Team: GRB/Stixs
Rankings
2025 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
82 - 83
Velo Range
2/18/23
2253
Spin Rate (avg)
2/18/23
Changeup
75 - 78
Velo Range
2/18/23
1964
Spin Rate (avg)
2/18/23
Curveball
61 - 63
Velo Range
3/13/21
-
Spin Rate (avg)
Slider
72.7 - 74.4
Velo Range
2/18/23
2025
Spin Rate (avg)
2/18/23
70
Exit Velocity (max)
3/13/21
-
Exit Velocity (avg)
-
Distance (max)
-
Sweet Spot %
7.53
60
3/13/21
-
30-yd
-
10-yd
-
Run speed (max)
72
INF Velo
3/13/21
-
OF Velo
-
C Velo
-
Pop Time
Positional Tools
2021
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.53
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
72.0
Power / Speed Score
A simple calculation that divides the athlete’s Exit Velocity Max by the athlete’s 60 Yard Dash time for the given event year. For example, 98 MPH / 7.00s = 14.00.
9.3
Hitting
Hitting
Pitching
2023
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.9
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
82.2
Fastball
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
2253
Fastball
Spin Score Avg
The average Bauer Units value of all fastballs in the given event year. Bauer Units are calculated for each pitch by dividing Spin Rate by Velocity.
27.4
Fastball
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
76.5
Changeup
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
1964
Changeup
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
73.6
Slider
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
2025
Slider
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
80.4
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
78.7
Fastball
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
2207
Fastball
Spin Score Avg
The average Bauer Units value of all fastballs in the given event year. Bauer Units are calculated for each pitch by dividing Spin Rate by Velocity.
28.0
Fastball
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
70.9
Slider
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
2002
Slider
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Sinker
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
77.7
Sinker
Spin Rate Avg
The average rate of spin for all pitches of this type in the given event year. Measured in rotations per minute (RPM).
2172
Sinker
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
West Milwaukee Preseason ID
Feb 18, 2023
Trackman - Fastball
82.9
Velocity (max)
81.6 - 82.7
Velo Range
82.5
Eff Velocity (avg)
2,324
Spin Rate (max)
2,253
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
74.8
Velocity (max)
72.7 - 74.4
Velo Range
73.2
Eff Velocity (avg)
2,087
Spin Rate (max)
2,025
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - ChangeUp
77.6
Velocity (max)
75.2 - 77.6
Velo Range
77.1
Eff Velocity (avg)
2,056
Spin Rate (max)
1,964
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Madison Preseason ID
Mar 13, 2022
Trackman - Fastball
80.4
Velocity (max)
77.3 - 80.1
Velo Range
79.3
Eff Velocity (avg)
2,272
Spin Rate (max)
2,207
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Slider
72.1
Velocity (max)
69.6 - 72.1
Velo Range
70.3
Eff Velocity (avg)
2,135
Spin Rate (max)
2,002
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Sinker
78.7
Velocity (max)
77.2 - 78.3
Velo Range
76.9
Eff Velocity (avg)
2,229
Spin Rate (max)
2,172
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Pitch Scores
Pitching Velos
2023
2022
2021
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
83.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
82.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.5
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
80.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
78.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
71.0
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
78.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
62.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
63.0
Game Performance
2023
RSi
The reactive strength index measurement of an athlete's explosiveness by comparing their jump height to the ground contact time in between their jumps. On a scale of 0-5.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
West Milwaukee Preseason ID
Feb 18, 2023
Swift
1.22
RSi (max)
1.22
RSi (avg)
1,464
Jump Power (max)
28.1
Jump Height (max)
27.8
Jump Height (avg)
Visual Edge
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
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RHP Jack Welak (Catholic Memorial, 2025) is a top-40-ranked member of the state’s sophomore class. He stood out again last weekend, where the 5-foot-10, 160-pound athlete displayed a repeatable delivery and a loose arm showcasing the ability to drive balls through the zone with his tailing fastball at 82-83 mph. He also wields a slider with big lateral movement that he can land in the zone for strikes and expand for chase and swings and misses. Finally, Welak showed impressive feel for a fading changeup at quality arm speed to round out his three-pitch mix. He’s an interesting uncommitted follow to monitor this spring and summer.
Positional Profile: RHP/3B
Body: 5-10, 160-pounds. Well-proportioned frame, athletic, fill coming.
Delivery: Tall and fall delivery with pre-set post leg, fluid leg lift into directional stride, repeatable.
Arm Action: RH. High 3/4 slot, clean, loose arm action, works free with occasional depth on backs side.
FB: T83, 82-83 mph. Plays with above average arm-side run, solid feel of the zone, mixes in two seam with sink. T2324, 2253 average rpm.
SL: 73-74 mph. 10/4 shape, works well laterally, above average movement. T2087, 2025 average rpm.
CH: 75-78 mph. Fastball arm speed, showed fade action and above average feel. T2056, 1964 average rpm.
Positional Profile: RHP/3B
Body: 5-10, 145-pounds. Thin, lean, loose mover.
Delivery: Repeatable delivery, moves athletically into a slight drop/drive lower-half that works in-line to the plate, square landing foot.
Arm Action: RH. Clean arm that plays from a 3/4 slot.
FB: T80.4, 77.3-80.1 mph. Heavy sinking action, thrown for strikes. T2271, 2207 average rpm.
SL: 69.6-72.1 mph. Tight 10/4 shape, mature feel. T2135, 2001 average rpm.
Welak made a strong impression on our scouting staff on Sunday, boasting a heavy sinking fastball up to 80 mph. Welak then went to a sharp 10/4 slider at 69-72 mph while showcasing mature feel, navigating it around the zone with ease.