Cached Feb 15, 2026 7:56 AM
Aiden Jahng – Player Evaluation Report – TopVelocity.ai
Aiden Jahng

Aiden Jahng

USA 18 years old Born Dec 8, 2007 Eval: Mar 24, 2023
RHP TopVelocity Evaluation
73
Velocity
5'10"
Height
185
Weight
🤖

AI Velocity Analysis

Machine learning prediction based on 1,535 elite athletes

Camp Velocity
73
mph
AI Prediction
74
mph
Based on physical metrics
Difference
1.8
mph
Below prediction
Proficiency
32
%ile
Mechanics efficiency
💡
What this means: Below average mechanics - significant improvement potential

💪 Athletic Variables to Improve

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

Broad Jump +2.1 mph
Current 92.0" 32%ile
Goal 100.0" 62%ile
Lateral Broad Jump (Combined) +2.0 mph
Current 154.0" 42%ile
Goal 164.0" 72%ile
Right Grip +1.8 mph
Current 110.0 lbs 53%ile
Goal 125.0 lbs 83%ile
Vertical Jump 225 +1.8 mph
Current 20.0" 50%ile
Goal 23.0" 80%ile
Left Grip +1.8 mph
Current 105.0 lbs 49%ile
Goal 120.0 lbs 79%ile
Vertical Jump +1.8 mph
Current 22.0" 14%ile
Goal 25.0" 44%ile
10-Yard Sprint +1.5 mph
Current 1.800s 14%ile
Goal 1.680s 44%ile
Total Body Strength +1.4 mph
Current 310.0 lbs 15%ile
Goal 390.0 lbs 45%ile

🎯 Biomechanic Variables to Improve

Motion capture metrics from your throwing mechanics analysis.

Trunk Rotation Speed @ FFS +1.9 mph
Current 397.0°/s 15%ile
Goal 755.6°/s 45%ile
Pelvis Rotation Speed @ FFS +1.7 mph
Current 393.0°/s 29%ile
Goal 521.1°/s 59%ile
Trunk Flexion @ Ball Release +1.3 mph
Current 29.0° 46%ile
Goal 37.5° 76%ile
Arm External Rotation @ MER +1.2 mph
Current 147.0° 17%ile
Goal 184.0° 47%ile
Total Potential Velocity Gain: +20.3 mph → Target: 90 mph
✓ Target of 90 mph is achievable!
You need +17.0 mph to reach your target.
Improving to 90th percentile in the metrics above can provide +20.3 mph.
🎖️

TopVelocity Ranking

Based on the TopVelocity Evaluation System

Current Rank
Unranked
Youth Level 3 3/16 metrics
Youth Level 2 4/16 metrics
Youth Level 1 8/16 metrics
Vertical Jump 22.0 / ≥17.0
Broad Jump 92.0 / ≥72.0
10 Yard Sprint 1.8 / ≤2.1
Total Body Strength 310.0 / ≥200.0
Right Hip Internal Rotation 20.0 / ≥30.0
Left Hip Internal Rotation 25.0 / ≥30.0
Right Hip Extension 10.0 / ≥15.0
Left Hip Extension 10.0 / ≥15.0
Right Hip Flexion 80.0 / ≥80.0
Left Hip Flexion 80.0 / ≥80.0
Right Hip Abduction 40.0 / ≥45.0
Left Hip Abduction 40.0 / ≥45.0
Right Trunk Rotation 50.0 / ≥65.0
Left Trunk Rotation 60.0 / ≥65.0
Right Dorsiflexion 10.0 / ≥10.0
Left Dorsiflexion 10.0 / ≥10.0
📊 Performance Scores (Percentile)
🔄
40
Mobility
💪
38
Shoulder
40
Power
⚖️
24
Balance
🎯
44
Mechanics
🏆
37
Overall
📏

Anthropometric

3 metrics measured

40
Overall
70.0 in
in
Body Height
25th Percentile
Elite (90th): 75.0 in
Difference: -5.0 in
185 lbs
lbs
Body Weight
54th Percentile
Elite (90th): 216 lbs
Difference: -31 lbs
71.0 in
in
Wing Span
41th Percentile
Elite (90th): 76.0 in
Difference: -5.0 in
🔄

Mobility

23 metrics measured

40
Overall
10 °
°
Right Dorsiflexion
50th Percentile
Elite (90th): 19 °
Difference: -9 °
10 °
°
Left Dorsiflexion
50th Percentile
Elite (90th): 18 °
Difference: -8 °
40 °
°
Right Plantar Flexion
4th Percentile
Elite (90th): 75 °
Difference: -35 °
40 °
°
Left Plantar Flexion
4th Percentile
Elite (90th): 75 °
Difference: -35 °
20 °
°
Right Hip Internal Rotation
25th Percentile
Elite (90th): 40 °
Difference: -20 °
25 °
°
Left Hip Internal Rotation
25th Percentile
Elite (90th): 40 °
Difference: -15 °
40 °
°
Right Hip External Rotation
50th Percentile
Elite (90th): 54 °
Difference: -14 °
45 °
°
Left Hip External Rotation
75th Percentile
Elite (90th): 50 °
Difference: -5 °
10 °
°
Right Hip Extension
5th Percentile
Elite (90th): 25 °
Difference: -15 °
10 °
°
Left Hip Extension
5th Percentile
Elite (90th): 25 °
Difference: -15 °
80 °
°
Right Hip Flexion
50th Percentile
Elite (90th): 95 °
Difference: -15 °
80 °
°
Left Hip Flexion
50th Percentile
Elite (90th): 95 °
Difference: -15 °
40 °
°
Right Hip Abduction
25th Percentile
Elite (90th): 51 °
Difference: -11 °
40 °
°
Left Hip Abduction
25th Percentile
Elite (90th): 52 °
Difference: -12 °
70 °
°
Right Shoulder Internal Rotation
90th Percentile
Elite (90th): 70 °
Difference: ✓ Elite
60 °
°
Left Shoulder Internal Rotation
66th Percentile
Elite (90th): 80 °
Difference: -20 °
100 °
°
Right Shoulder External Rotation
37th Percentile
Elite (90th): 120 °
Difference: -20 °
80 °
°
Left Shoulder External Rotation
5th Percentile
Elite (90th): 115 °
Difference: -35 °
30 °
°
Right Shoulder Horizontal Abduction
75th Percentile
Elite (90th): 35 °
Difference: -5 °
30 °
°
Left Shoulder Horizontal Abduction
75th Percentile
Elite (90th): 35 °
Difference: -5 °
40 °
°
Trunk Extension
59th Percentile
Elite (90th): 50 °
Difference: -10 °
50 °
°
Right Trunk Rotation
10th Percentile
Elite (90th): 75 °
Difference: -25 °
60 °
°
Left Trunk Rotation
50th Percentile
Elite (90th): 70 °
Difference: -10 °
💪

Strength & Power

11 metrics measured

40
Overall
22.0 in
in
Vertical Jump
20th Percentile
Elite (90th): 30.0 in
Difference: -8.0 in
20.0 in
in
Vertical Jump 225lbs
50th Percentile
Elite (90th): 24.3 in
Difference: -4.3 in
92 in
in
Broad Jump
37th Percentile
Elite (90th): 108 in
Difference: -16 in
78 in
in
Right Lateral Broad Jump
50th Percentile
Elite (90th): 86 in
Difference: -8 in
76 in
in
Left Lateral Broad Jump
41th Percentile
Elite (90th): 86 in
Difference: -10 in
1.800 s
s
10 Yard Sprint
5th Percentile
Elite (90th): 1.880 s
Difference: -0.080 s
310 lbs
lbs
Total Body Strength
16th Percentile
Elite (90th): 600 lbs
Difference: -290 lbs
110 lbs
lbs
Right Grip Strength
57th Percentile
Elite (90th): 130 lbs
Difference: -20 lbs
105 lbs
lbs
Left Grip Strength
50th Percentile
Elite (90th): 130 lbs
Difference: -25 lbs
863 W
W
Right Rotational Power
81th Percentile
Elite (90th): 973 W
Difference: -110 W
475 W
W
Left Rotational Power
28th Percentile
Elite (90th): 909 W
Difference: -434 W
⚖️

Balance

6 metrics measured

24
Overall
22 in
in
Right Y-Balance 1
17th Percentile
Elite (90th): 36 in
Difference: -14 in
29 in
in
Right Y-Balance 2
20th Percentile
Elite (90th): 47 in
Difference: -18 in
28 in
in
Right Y-Balance 3
20th Percentile
Elite (90th): 46 in
Difference: -18 in
25 in
in
Left Y-Balance 1
41th Percentile
Elite (90th): 37 in
Difference: -12 in
27 in
in
Left Y-Balance 2
10th Percentile
Elite (90th): 46 in
Difference: -19 in
32 in
in
Left Y-Balance 3
37th Percentile
Elite (90th): 47 in
Difference: -15 in
🎯

Shoulder Strength

4 metrics measured

38
Overall
199 °
°
Right Shoulder Flexion
75th Percentile
Elite (90th): 209 °
Difference: -10 °
30 lbs
lbs
Right Shoulder Internal Rotation Strength
22th Percentile
Elite (90th): 55 lbs
Difference: -25 lbs
31 lbs
lbs
Right Shoulder External Rotation Strength
37th Percentile
Elite (90th): 49 lbs
Difference: -18 lbs
19 lbs
lbs
Scaption Right Back
16th Percentile
Elite (90th): 36 lbs
Difference: -17 lbs
⚙️

Mechanics

15 metrics measured

44
Overall
-1 °
°
Hip Shoulder Separation Before Leg Drive
16th Percentile
Elite (90th): 21 °
Difference: -22 °
20 °
°
Trunk Flexion Before Leg Drive
19th Percentile
Elite (90th): 32 °
Difference: -12 °
61 °
°
Drive Knee Extension Before Leg Drive
50th Percentile
Elite (90th): 70 °
Difference: -9 °
45 °
°
Left Knee Flexion Front Foot Strike
33th Percentile
Elite (90th): 58 °
Difference: -13 °
13 °
°
Dominate Arm External Rotation Front Foot Strike
4th Percentile
Elite (90th): 97 °
Difference: -84 °
52 °
°
Dominate Arm Shoulder Abduction Front Foot Strike
95th Percentile
Elite (90th): 45 °
Difference: ✓ Elite
393 °/s
°/s
Pelvis Rotation Speed Front Foot Strike
28th Percentile
Elite (90th): 673 °/s
Difference: -280 °/s
397 °/s
°/s
Trunk Rotation Speed Front Foot Strike
26th Percentile
Elite (90th): 756 °/s
Difference: -359 °/s
147 °
°
Dominate Arm External Rotation Maximum External Rotation
22th Percentile
Elite (90th): 184 °
Difference: -37 °
0 °
°
Dominate Arm Shoulder Abduction Maximum External Rotation
58th Percentile
Elite (90th): 9 °
Difference: -9 °
1289 °/s
°/s
Dominate Arm External Rotation Speed Maximum External Rotation
91th Percentile
Elite (90th): 1238 °/s
Difference: ✓ Elite
29 °
°
Trunk Flexion Ball Release
50th Percentile
Elite (90th): 42 °
Difference: -13 °
99 °
°
Dominate Arm Shoulder Abduction Ball Release
68th Percentile
Elite (90th): 105 °
Difference: -6 °
-17 °
°
Dominate Arm Shoulder Horizontal Abduction Ball Release
37th Percentile
Elite (90th): -2 °
Difference: -15 °
48 °
°
Dominate Arm Extension Ball Release
56th Percentile
Elite (90th): 70 °
Difference: -22 °

Pitch Metrics

1 metrics measured

23
Overall
73 mph
mph
Total Velocity
22th Percentile
Elite (90th): 86 mph
Difference: -13 mph
🎯

Brent Pourciau's Analysis

Road to 90

Personalized roadmap for Aiden Jahng

📊 The Overview
Alright Aiden, here's your Road to 90. You're currently sitting at 73 mph, which means you need about 17.0 mph to hit your target of 90. Your profile is in the 37th percentile overall, which means there's significant room to grow. The good news? Every improvement you make will translate to velocity.
🤖 What The AI Analysis Tells Me
Aiden, here's your reality check. You're at 73 mph, and the AI model predicted 74.8 mph based on your physical profile. You're pretty much right where you'd expect to be. This means you're efficiently converting your athleticism into velocity — no major mechanical leaks, but also room to grow both physically AND mechanically.
Your mechanics efficiency is at the 32th percentile — there's definitely room to improve here. This isn't bad news, though. It means that as we work on your movement patterns and delivery, you'll see velocity gains without even getting stronger. The 3X Pitching Velocity Program addresses exactly this.
🎯 Your Biggest Opportunities
Based on the AI analysis, here are your biggest opportunities to add velocity:
Broad Jump +2.1 mph
Current: 92.0" (32th %ile) Target: 100.0" (62th %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: 154.0" (42th %ile) Target: 164.0" (72th %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.
Right Grip Strength +1.8 mph
Current: 110.0 lbs (53th %ile) Target: 125.0 lbs (83th %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 +6.1 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 +17.0 mph to hit 90, and the improvements above give you +20.3 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. Your mechanics efficiency score tells me there's velocity sitting on the table right now. The 3X Program will teach you how to sequence your body properly and transfer all that force into the ball. 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 hip internal rotation. Together, these account for about 1.6 mph of your velocity gap.
Broad Jump +0.9 mph
Current 92 in
Percentile 38th
Target 102 in
To Gain +10 in
Left Hip Internal Rotation +0.7 mph
Current 25 °
Percentile 25th
Target 34 °
To Gain +9 °
🔧 Supporting Work
After that, it's about the supporting package: left shoulder external rotation (mobility), Total Body Strength, vertical 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 External Rotation Maximum External Rotation and Pelvis Rotation Speed 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 External Rotation Maximum External Rotation +1.2 mph
Current Percentile 23th
🎯 Your Action Plan
Movement Cues:
"Shin down, leverage, drive — use the ground."
Training Priorities:
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
Hit these targets, re-test, and the system will update the next set of variables to chase. This is iterative — each evaluation narrows the focus as your profile improves. Plan to re-evaluate in 8-12 weeks.

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Achievement Milestones

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