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Kai Affolter – Player Evaluation Report – TopVelocity.ai
Kai Affolter

Kai Affolter

USA 27 years old Born Sep 4, 1998 Eval: Jan 11, 2026
LHP TopVelocity Evaluation
76
Velocity
5'10"
Height
229
Weight
🤖

AI Velocity Analysis

Machine learning prediction based on 1,535 elite athletes

Camp Velocity
76
mph
AI Prediction
75
mph
Based on physical metrics
Difference
+1.1
mph
Above prediction
Proficiency
58
%ile
Mechanics efficiency
💡
What this means: Average mechanics - typical for athlete profile
You're throwing 1.1 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 86.0" 17%ile
Goal 96.0" 47%ile
Lateral Broad Jump (Combined) +2.0 mph
Current 138.0" 9%ile
Goal 152.0" 39%ile
Vertical Jump +1.8 mph
Current 22.0" 14%ile
Goal 25.0" 44%ile
Right Grip +1.8 mph
Current 105.0 lbs 44%ile
Goal 118.9 lbs 74%ile
Left Grip +1.8 mph
Current 105.0 lbs 49%ile
Goal 120.0 lbs 79%ile
10-Yard Sprint +1.5 mph
Current 1.730s 27%ile
Goal 1.650s 57%ile
Total Body Strength +1.4 mph
Current 375.0 lbs 41%ile
Goal 450.0 lbs 71%ile
Hip Extension (Combined) +0.6 mph
Current 20.0° 4%ile
Goal 30.0° 34%ile
Total Potential Velocity Gain: +13.0 mph → Target: 90 mph
Working Toward 90 mph
You need +13.7 mph to reach your target.
Improving to 90th percentile in the metrics above can provide +13.0 mph.
0.7 mph gap remaining
This small gap can likely be closed with continued development.
🎖️

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 7/16 metrics
Vertical Jump 22.0 / ≥17.0
Broad Jump 86.0 / ≥72.0
10 Yard Sprint 1.7 / ≤2.1
Total Body Strength 375.0 / ≥200.0
Right Hip Internal Rotation 25.0 / ≥30.0
Left Hip Internal Rotation 20.0 / ≥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 70.0 / ≥80.0
Right Hip Abduction 40.0 / ≥45.0
Left Hip Abduction 40.0 / ≥45.0
Right Trunk Rotation 40.0 / ≥65.0
Left Trunk Rotation 60.0 / ≥65.0
Right Dorsiflexion 10.0 / ≥10.0
Left Dorsiflexion 10.0 / ≥10.0
📊 Performance Scores (Percentile)
🔄
38
Mobility
26
Power
🏆
32
Overall
📏

Anthropometric

3 metrics measured

57
Overall
70.0 in
in
Body Height
25th Percentile
Elite (90th): 75.0 in
Difference: -5.0 in
229 lbs
lbs
Body Weight
94th Percentile
Elite (90th): 216 lbs
Difference: ✓ Elite
72.0 in
in
Wing Span
50th Percentile
Elite (90th): 76.0 in
Difference: -4.0 in
🔄

Mobility

23 metrics measured

38
Overall
10 °
°
Right Dorsiflexion
50th Percentile
Elite (90th): 19 °
Difference: -9 °
10 °
°
Left Dorsiflexion
50th Percentile
Elite (90th): 18 °
Difference: -8 °
50 °
°
Right Plantar Flexion
10th Percentile
Elite (90th): 75 °
Difference: -25 °
45 °
°
Left Plantar Flexion
5th Percentile
Elite (90th): 75 °
Difference: -30 °
25 °
°
Right Hip Internal Rotation
37th Percentile
Elite (90th): 40 °
Difference: -15 °
20 °
°
Left Hip Internal Rotation
10th Percentile
Elite (90th): 40 °
Difference: -20 °
55 °
°
Right Hip External Rotation
95th Percentile
Elite (90th): 54 °
Difference: ✓ Elite
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 °
70 °
°
Left Hip Flexion
19th Percentile
Elite (90th): 95 °
Difference: -25 °
40 °
°
Right Hip Abduction
25th Percentile
Elite (90th): 51 °
Difference: -11 °
40 °
°
Left Hip Abduction
25th Percentile
Elite (90th): 52 °
Difference: -12 °
75 °
°
Right Shoulder Internal Rotation
92th Percentile
Elite (90th): 70 °
Difference: ✓ Elite
65 °
°
Left Shoulder Internal Rotation
75th Percentile
Elite (90th): 80 °
Difference: -15 °
80 °
°
Right Shoulder External Rotation
4th Percentile
Elite (90th): 120 °
Difference: -40 °
90 °
°
Left Shoulder External Rotation
25th Percentile
Elite (90th): 115 °
Difference: -25 °
25 °
°
Right Shoulder Horizontal Abduction
50th Percentile
Elite (90th): 35 °
Difference: -10 °
30 °
°
Left Shoulder Horizontal Abduction
75th Percentile
Elite (90th): 35 °
Difference: -5 °
35 °
°
Trunk Extension
42th Percentile
Elite (90th): 50 °
Difference: -15 °
40 °
°
Right Trunk Rotation
4th Percentile
Elite (90th): 75 °
Difference: -35 °
60 °
°
Left Trunk Rotation
50th Percentile
Elite (90th): 70 °
Difference: -10 °
💪

Strength & Power

8 metrics measured

26
Overall
22.0 in
in
Vertical Jump
20th Percentile
Elite (90th): 30.0 in
Difference: -8.0 in
86 in
in
Broad Jump
21th Percentile
Elite (90th): 108 in
Difference: -22 in
70 in
in
Right Lateral Broad Jump
17th Percentile
Elite (90th): 86 in
Difference: -16 in
68 in
in
Left Lateral Broad Jump
10th Percentile
Elite (90th): 86 in
Difference: -18 in
1.730 s
s
10 Yard Sprint
5th Percentile
Elite (90th): 1.880 s
Difference: -0.150 s
375 lbs
lbs
Total Body Strength
35th Percentile
Elite (90th): 600 lbs
Difference: -225 lbs
105 lbs
lbs
Right Grip Strength
47th Percentile
Elite (90th): 130 lbs
Difference: -25 lbs
105 lbs
lbs
Left Grip Strength
50th Percentile
Elite (90th): 130 lbs
Difference: -25 lbs

Pitch Metrics

5 metrics measured

37
Overall
1200 °
°
Spin Axis
10th Percentile
Elite (90th): 1200 °
Difference: +0 °
16 in
in
Vertical Break
50th Percentile
Elite (90th): 20 in
Difference: -4 in
-13 in
in
Horizontal Break
5th Percentile
Elite (90th): 14 in
Difference: -27 in
2101 rpm
rpm
Total Spin
81th Percentile
Elite (90th): 2178 rpm
Difference: -77 rpm
76 mph
mph
Total Velocity
39th Percentile
Elite (90th): 86 mph
Difference: -10 mph
🎯

Brent Pourciau's Analysis

Road to 90

Personalized roadmap for Kai Affolter

📊 The Overview
Alright Kai, here's your Road to 90. You're currently sitting at 76.3 mph, which means you need about 13.7 mph to hit your target of 90. You're early in your development journey at the 32th 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
Kai, let me break this down for you. You're sitting at 76.3 mph right now, and our AI model — which has analyzed over 800 elite athletes — predicted 75.2 mph based on your physical metrics. You're actually beating that prediction by 1.1 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 58th 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: 86.0" (17th %ile) Target: 96.0" (47th %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: 138.0" (9th %ile) Target: 152.0" (39th %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.
Vertical Jump +1.8 mph
Current: 22.0" (14th %ile) Target: 25.0" (44th %ile)
Why it matters: Vertical jump measures your explosive power — your ability to generate force quickly. This directly translates to how hard you can drive off the rubber.
How we fix it: The Impulse Ground Force Trainer develops your ability to create force into the ground explosively. Pair it with box jumps, depth jumps, and Olympic lift variations in the 3X Program.
These three priorities alone = +5.9 mph potential
🏆 Can You Hit Your Target?
Let me be honest with you — getting to 90 mph is a big goal. The improvements I've outlined give you about +13.0 mph, which would put you around 89 mph. That's a great interim target. The remaining 0.7 mph gap can be closed through consistent training, mechanical refinement, and maturation. It's going to take time and work, but it's doable.
🚀 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 vertical jump. Together, these account for about 3.3 mph of your velocity gap.
Broad Jump +1.6 mph
Current 86 in
Percentile 21th
Target 102 in
To Gain +16 in
Vertical Jump +1.6 mph
Current 22 in
Percentile 20th
Target 28 in
To Gain +6 in
🔧 Supporting Work
After that, it's about the supporting package: left ankle dorsiflexion (mobility), Left Lateral Broad Jump, Left Grip Strength (power/stability), Body Height. These aren't the headline levers, but they raise the floor and make your mechanics easier to execute.
🎯 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