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Will Kapustka – Player Evaluation Report – TopVelocity.ai
Will Kapustka

Will Kapustka

USA 15 years old Born Sep 9, 2010 Eval: Feb 17, 2024
RHP TopVelocity Evaluation
69
Velocity
5'9"
Height
133
Weight
🤖

AI Velocity Analysis

Machine learning prediction based on 1,535 elite athletes

Camp Velocity
69
mph
AI Prediction
67
mph
Based on physical metrics
Difference
+1.4
mph
Above prediction
Proficiency
60
%ile
Mechanics efficiency
💡
What this means: Good mechanics - room for improvement
You're throwing 1.4 mph faster than athletes with similar physical profiles — great mechanics!

💪 Athletic Variables to Improve

Physical metrics that directly impact velocity. Focus on these for maximum gains.

Broad Jump +2.1 mph
Current 82.0" 9%ile
Goal 94.0" 39%ile
Lateral Broad Jump (Combined) +2.0 mph
Current 143.0" 17%ile
Goal 154.0" 47%ile
Left Grip +1.8 mph
Current 65.0 lbs 3%ile
Goal 95.0 lbs 33%ile
Right Grip +1.8 mph
Current 72.0 lbs 5%ile
Goal 100.0 lbs 35%ile
Vertical Jump +1.8 mph
Current 20.0" 6%ile
Goal 24.0" 36%ile
10-Yard Sprint +1.5 mph
Current 1.980s 2%ile
Goal 1.710s 32%ile
Weight +1.5 mph
Current 133.0 lbs 8%ile
Goal 171.5 lbs 38%ile
Total Body Strength +1.4 mph
Current 290.0 lbs 10%ile
Goal 370.0 lbs 40%ile

🎯 Biomechanic Variables to Improve

Motion capture metrics from your throwing mechanics analysis.

Trunk Rotation Speed @ FFS +1.9 mph
Current 388.0°/s 14%ile
Goal 755.6°/s 44%ile
Pelvis Rotation Speed @ FFS +1.7 mph
Current 399.0°/s 30%ile
Goal 529.7°/s 60%ile
Trunk Flexion @ Ball Release +1.3 mph
Current 25.0° 31%ile
Goal 32.6° 61%ile
Arm Rotation Speed @ MER +1.1 mph
Current 856.0°/s 48%ile
Goal 1,026.7°/s 78%ile
Arm External Rotation @ FFS +1.0 mph
Current 84.0° 59%ile
Goal 96.5° 89%ile
Arm Extension @ Ball Release +0.5 mph
Current 39.0° 20%ile
Goal 45.0° 50%ile
Total Potential Velocity Gain: +21.4 mph → Target: 90 mph
✓ Target of 90 mph is achievable!
You need +21.0 mph to reach your target.
Improving to 90th percentile in the metrics above can provide +21.4 mph.
🎖️

TopVelocity Ranking

Based on the TopVelocity Evaluation System

Current Rank
Unranked
Youth Level 3 0/16 metrics
Youth Level 2 4/16 metrics
Youth Level 1 9/16 metrics
Vertical Jump 20.0 / ≥17.0
Broad Jump 82.0 / ≥72.0
10 Yard Sprint 2.0 / ≤2.1
Total Body Strength 290.0 / ≥200.0
Right Hip Internal Rotation 20.0 / ≥30.0
Left Hip Internal Rotation 20.0 / ≥30.0
Right Hip Extension 20.0 / ≥15.0
Left Hip Extension 10.0 / ≥15.0
Right Hip Flexion 85.0 / ≥80.0
Left Hip Flexion 80.0 / ≥80.0
Right Hip Abduction 35.0 / ≥45.0
Left Hip Abduction 35.0 / ≥45.0
Right Trunk Rotation 50.0 / ≥65.0
Left Trunk Rotation 50.0 / ≥65.0
Right Dorsiflexion 10.0 / ≥10.0
Left Dorsiflexion 10.0 / ≥10.0
📊 Performance Scores (Percentile)
🔄
39
Mobility
💪
30
Shoulder
15
Power
⚖️
32
Balance
🎯
53
Mechanics
🏆
34
Overall
📏

Anthropometric

3 metrics measured

12
Overall
69.0 in
in
Body Height
19th Percentile
Elite (90th): 75.0 in
Difference: -6.0 in
133 lbs
lbs
Body Weight
7th Percentile
Elite (90th): 216 lbs
Difference: -83 lbs
67.0 in
in
Wing Span
10th Percentile
Elite (90th): 76.0 in
Difference: -9.0 in
🔄

Mobility

23 metrics measured

39
Overall
10 °
°
Right Dorsiflexion
50th Percentile
Elite (90th): 19 °
Difference: -9 °
10 °
°
Left Dorsiflexion
50th Percentile
Elite (90th): 18 °
Difference: -8 °
45 °
°
Right Plantar Flexion
5th Percentile
Elite (90th): 75 °
Difference: -30 °
45 °
°
Left Plantar Flexion
5th Percentile
Elite (90th): 75 °
Difference: -30 °
20 °
°
Right Hip Internal Rotation
25th Percentile
Elite (90th): 40 °
Difference: -20 °
20 °
°
Left Hip Internal Rotation
10th Percentile
Elite (90th): 40 °
Difference: -20 °
40 °
°
Right Hip External Rotation
50th Percentile
Elite (90th): 54 °
Difference: -14 °
45 °
°
Left Hip External Rotation
75th Percentile
Elite (90th): 50 °
Difference: -5 °
20 °
°
Right Hip Extension
62th Percentile
Elite (90th): 25 °
Difference: -5 °
10 °
°
Left Hip Extension
5th Percentile
Elite (90th): 25 °
Difference: -15 °
85 °
°
Right Hip Flexion
62th Percentile
Elite (90th): 95 °
Difference: -10 °
80 °
°
Left Hip Flexion
50th Percentile
Elite (90th): 95 °
Difference: -15 °
35 °
°
Right Hip Abduction
5th Percentile
Elite (90th): 51 °
Difference: -16 °
35 °
°
Left Hip Abduction
5th Percentile
Elite (90th): 52 °
Difference: -17 °
65 °
°
Right Shoulder Internal Rotation
82th Percentile
Elite (90th): 70 °
Difference: -5 °
60 °
°
Left Shoulder Internal Rotation
66th Percentile
Elite (90th): 80 °
Difference: -20 °
115 °
°
Right Shoulder External Rotation
82th Percentile
Elite (90th): 120 °
Difference: -5 °
115 °
°
Left Shoulder External Rotation
90th Percentile
Elite (90th): 115 °
Difference: ✓ Elite
20 °
°
Right Shoulder Horizontal Abduction
10th Percentile
Elite (90th): 35 °
Difference: -15 °
25 °
°
Left Shoulder Horizontal Abduction
50th Percentile
Elite (90th): 35 °
Difference: -10 °
30 °
°
Trunk Extension
25th Percentile
Elite (90th): 50 °
Difference: -20 °
50 °
°
Right Trunk Rotation
10th Percentile
Elite (90th): 75 °
Difference: -25 °
50 °
°
Left Trunk Rotation
25th Percentile
Elite (90th): 70 °
Difference: -20 °
💪

Strength & Power

10 metrics measured

15
Overall
20.0 in
in
Vertical Jump
10th Percentile
Elite (90th): 30.0 in
Difference: -10.0 in
82 in
in
Broad Jump
13th Percentile
Elite (90th): 108 in
Difference: -26 in
70 in
in
Right Lateral Broad Jump
17th Percentile
Elite (90th): 86 in
Difference: -16 in
73 in
in
Left Lateral Broad Jump
29th Percentile
Elite (90th): 86 in
Difference: -13 in
1.980 s
s
10 Yard Sprint
6th Percentile
Elite (90th): 1.880 s
Difference: +0.100 s
290 lbs
lbs
Total Body Strength
12th Percentile
Elite (90th): 600 lbs
Difference: -310 lbs
72 lbs
lbs
Right Grip Strength
7th Percentile
Elite (90th): 130 lbs
Difference: -58 lbs
65 lbs
lbs
Left Grip Strength
5th Percentile
Elite (90th): 130 lbs
Difference: -65 lbs
590 W
W
Right Rotational Power
41th Percentile
Elite (90th): 973 W
Difference: -383 W
268 W
W
Left Rotational Power
4th Percentile
Elite (90th): 909 W
Difference: -641 W
⚖️

Balance

6 metrics measured

32
Overall
26 in
in
Right Y-Balance 1
50th Percentile
Elite (90th): 36 in
Difference: -10 in
32 in
in
Right Y-Balance 2
37th Percentile
Elite (90th): 47 in
Difference: -15 in
29 in
in
Right Y-Balance 3
25th Percentile
Elite (90th): 46 in
Difference: -17 in
25 in
in
Left Y-Balance 1
41th Percentile
Elite (90th): 37 in
Difference: -12 in
29 in
in
Left Y-Balance 2
20th Percentile
Elite (90th): 46 in
Difference: -17 in
29 in
in
Left Y-Balance 3
20th Percentile
Elite (90th): 47 in
Difference: -18 in
🎯

Shoulder Strength

4 metrics measured

30
Overall
174 °
°
Right Shoulder Flexion
16th Percentile
Elite (90th): 209 °
Difference: -35 °
44 lbs
lbs
Right Shoulder Internal Rotation Strength
68th Percentile
Elite (90th): 55 lbs
Difference: -11 lbs
21 lbs
lbs
Right Shoulder External Rotation Strength
10th Percentile
Elite (90th): 49 lbs
Difference: -28 lbs
22 lbs
lbs
Scaption Right Back
25th Percentile
Elite (90th): 36 lbs
Difference: -14 lbs
⚙️

Mechanics

15 metrics measured

53
Overall
21 °
°
Hip Shoulder Separation Before Leg Drive
90th Percentile
Elite (90th): 21 °
Difference: ✓ Elite
20 °
°
Trunk Flexion Before Leg Drive
19th Percentile
Elite (90th): 32 °
Difference: -12 °
44 °
°
Drive Knee Extension Before Leg Drive
7th Percentile
Elite (90th): 70 °
Difference: -26 °
52 °
°
Left Knee Flexion Front Foot Strike
65th Percentile
Elite (90th): 58 °
Difference: -6 °
84 °
°
Dominate Arm External Rotation Front Foot Strike
67th Percentile
Elite (90th): 97 °
Difference: -13 °
33 °
°
Dominate Arm Shoulder Abduction Front Foot Strike
54th Percentile
Elite (90th): 45 °
Difference: -12 °
399 °/s
°/s
Pelvis Rotation Speed Front Foot Strike
30th Percentile
Elite (90th): 673 °/s
Difference: -274 °/s
388 °/s
°/s
Trunk Rotation Speed Front Foot Strike
24th Percentile
Elite (90th): 756 °/s
Difference: -368 °/s
175 °
°
Dominate Arm External Rotation Maximum External Rotation
75th Percentile
Elite (90th): 184 °
Difference: -9 °
6 °
°
Dominate Arm Shoulder Abduction Maximum External Rotation
81th Percentile
Elite (90th): 9 °
Difference: -3 °
856 °/s
°/s
Dominate Arm External Rotation Speed Maximum External Rotation
74th Percentile
Elite (90th): 1238 °/s
Difference: -382 °/s
25 °
°
Trunk Flexion Ball Release
37th Percentile
Elite (90th): 42 °
Difference: -17 °
97 °
°
Dominate Arm Shoulder Abduction Ball Release
56th Percentile
Elite (90th): 105 °
Difference: -8 °
-3 °
°
Dominate Arm Shoulder Horizontal Abduction Ball Release
87th Percentile
Elite (90th): -2 °
Difference: -1 °
39 °
°
Dominate Arm Extension Ball Release
33th Percentile
Elite (90th): 70 °
Difference: -31 °

Pitch Metrics

4 metrics measured

47
Overall
20 in
in
Vertical Break
90th Percentile
Elite (90th): 20 in
Difference: ✓ Elite
11 in
in
Horizontal Break
75th Percentile
Elite (90th): 14 in
Difference: -3 in
1539 rpm
rpm
Total Spin
11th Percentile
Elite (90th): 2178 rpm
Difference: -639 rpm
69 mph
mph
Total Velocity
12th Percentile
Elite (90th): 86 mph
Difference: -17 mph
🎯

Brent Pourciau's Analysis

Road to 90

Personalized roadmap for Will Kapustka

📊 The Overview
Alright Will, here's your Road to 90. You're currently sitting at 69 mph, which means you need about 21.0 mph to hit your target of 90. You're early in your development journey at the 34th percentile. At this stage, almost everything you work on will help — mobility, strength, power, and motor control all move the needle.
🤖 What The AI Analysis Tells Me
Will, let me break this down for you. You're sitting at 69 mph right now, and our AI model — which has analyzed over 800 elite athletes — predicted 67.6 mph based on your physical metrics. You're actually beating that prediction by 1.4 mph. That means your mechanics are doing their job. You're not leaving velocity on the table from inefficiency.
Your mechanics efficiency is at the 60th percentile — that's solid, right around average for our database. You're neither leaving a ton on the table nor maximizing everything. This is a good sign because it means improvements in BOTH your physical profile AND your mechanics will translate to velocity.
🎯 Your Biggest Opportunities
Based on the AI analysis, here are your biggest opportunities to add velocity:
Broad Jump +2.1 mph
Current: 82.0" (9th %ile) Target: 94.0" (39th %ile)
Why it matters: Your broad jump is one of the best predictors of pitching velocity because it measures your ability to produce horizontal force — exactly what you need off the mound.
How we fix it: The Stride Excelerator is perfect for this — it trains the exact horizontal force production pattern you use in your delivery. Combine that with plyometrics, bounds, and the TopVelocity Sled for resisted stride work.
Lateral Broad Jump +2.0 mph
Current: 143.0" (17th %ile) Target: 154.0" (47th %ile)
Why it matters: This measures your lateral power — critical because pitching involves a massive lateral push off the rubber before you rotate.
How we fix it: The Stride Excelerator trains this lateral drive pattern specifically. Combine it with lateral bounds and the TopVelocity Sled for lateral resisted work.
Left Grip Strength +1.8 mph
Current: 65.0 lbs (3th %ile) Target: 95.0 lbs (33th %ile)
Why it matters: Grip strength is the end of the kinetic chain. All that force you generate has to transfer through your hand to the ball.
How we fix it: Farmer carries, dead hangs, wrist work, and specific grip training in the 3X Program. This also helps with spin rate and command.
These three priorities alone = +5.9 mph potential
⚙️ The Mechanical Side
The AI also identified some mechanical variables from your motion capture data. There's about +7.5 mph worth of mechanical improvements available. These are things like trunk rotation speed, pelvis rotation, and arm timing — exactly what the 3X Pitching Velocity Program is designed to fix. The Trunk Excelerator specifically trains that rotational sequencing, and the Stride Excelerator grooves the lower half mechanics. This is where the real velocity unlocks.
🏆 Can You Hit Your Target?
Here's the best part — the math works. You need +21.0 mph to hit 90, and the improvements above give you +21.4 mph of potential. This is achievable. It's not going to happen overnight, but if you commit to the training and stay consistent, 90 mph is absolutely in reach.
🚀 My Recommendation
Based on everything I'm seeing here, here's what I recommend: The 3X Pitching Velocity Program is exactly what you need. This isn't just a throwing program — it's a complete system that addresses mechanics, strength, power, and motor learning all in one. You've got some physical development to do, and the 3X Program includes the strength and power protocols to build that foundation while you're learning elite mechanics. To accelerate your results, I highly recommend using the TopVelocity training devices that are built into the program: The Trunk Excelerator teaches you to generate and transfer rotational power through your core — this is where velocity lives. The Stride Excelerator builds explosive leg drive and proper stride mechanics, which is the foundation of the 3X approach. The Impulse Ground Force Trainer develops your ability to create force into the ground, and the TopVelocity Sled builds the specific strength patterns you need for a powerful delivery. These aren't gimmicks — they're tools designed to train the exact movement patterns that separate high-velocity pitchers from everyone else. Combine them with the 3X Program and you'll see results faster than training alone.
💪 Your Top Physical Priorities
The two biggest physical drivers for you right now are broad jump and Left Grip Strength. Together, these account for about 2.9 mph of your velocity gap.
Broad Jump +1.8 mph
Current 82 in
Percentile 14th
Target 102 in
To Gain +20 in
Left Grip Strength +1.1 mph
Current 65 lbs
Percentile 5th
Target 113.8 lbs
To Gain +48.8 lbs
🔧 Supporting Work
After that, it's about the supporting package: left ankle dorsiflexion, Left Hip Abduction (mobility), Left Lateral Broad Jump (power/stability), Body Height. These aren't the headline levers, but they raise the floor and make your mechanics easier to execute.
⚙️ Mechanical Focus
Mechanically, the key focus is Dominate Arm Extension Ball Release and Dominate Arm Shoulder Abduction Front Foot Strike. Most of the energy to the ball comes through the trunk, so trunk acceleration and sequencing are the big rocks to move.
Dominate Arm Extension Ball Release +0.2 mph
Current Percentile 33th
🎯 Your Action Plan
Movement Cues:
"Shin down, leverage, drive — use the ground."
Training Priorities:
Build Mass
Calorie surplus + structured strength phases. Mass equals gas — you need more raw material.
Explosive Power
Jump training (box jumps, bounds) + Olympic lift progressions (cleans, hang cleans). Train fast to be fast.
Mobility & Stability
Daily mobility work (hips, ankles, t-spine) + longer holds. Add single-leg stability for pelvic control.
🚀 What's Next
At your age, development is rapid and everything helps. Train consistently across all areas — as your profile climbs, the plan will become more specific. Re-test every 3-4 months to track your progress.

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Achievement Milestones

Evaluated
🎖 Ranked
80+ MPH
🔥 85+ MPH
💪 90+ Club
🏆 Pro Level