Cached Sep 12, 2026 12:42 AM
Emmitt Jefferson – Player Evaluation Report – TopVelocity.ai
Emmitt Jefferson

Emmitt Jefferson

USA 12 years old Born May 28, 2014 Eval: Dec 27, 2025
RHP TopVelocity Evaluation
58
Velocity
5'2"
Height
143
Weight
🤖

AI Velocity Analysis

Machine learning prediction based on 1,535 elite athletes

Camp Velocity
58
mph
AI Prediction
68
mph
Based on physical metrics
Difference
10.8
mph
Below prediction
Proficiency
3
%ile
Mechanics efficiency
💡
What this means: Needs work - large gap between potential and performance
There's potential to gain 10.8 mph through improved mechanics and training.

💪 Athletic Variables to Improve

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

Broad Jump +2.1 mph
Current 78.0" 5%ile
Goal 92.0" 35%ile
Lateral Broad Jump (Combined) +2.0 mph
Current 134.0" 6%ile
Goal 150.0" 36%ile
Left Grip +1.8 mph
Current 56.0 lbs 2%ile
Goal 95.0 lbs 32%ile
Right Grip +1.8 mph
Current 54.0 lbs 2%ile
Goal 99.4 lbs 32%ile
Vertical Jump +1.8 mph
Current 22.0" 14%ile
Goal 25.0" 44%ile
10-Yard Sprint +1.5 mph
Current 1.950s 3%ile
Goal 1.710s 33%ile
Weight +1.5 mph
Current 143.0 lbs 11%ile
Goal 174.2 lbs 41%ile
Total Body Strength +1.4 mph
Current 220.0 lbs 3%ile
Goal 350.0 lbs 33%ile

🎯 Biomechanic Variables to Improve

Motion capture metrics from your throwing mechanics analysis.

Trunk Rotation Speed @ FFS +1.9 mph
Current 338.0°/s 12%ile
Goal 755.6°/s 42%ile
Pelvis Rotation Speed @ FFS +1.7 mph
Current 429.0°/s 40%ile
Goal 576.5°/s 70%ile
Trunk Flexion @ Ball Release +1.3 mph
Current 32.0° 57%ile
Goal 41.0° 87%ile
Arm Rotation Speed @ MER +1.1 mph
Current 704.0°/s 36%ile
Goal 832.6°/s 66%ile
Shoulder Abduction @ MER +0.7 mph
Current 4.0° 49%ile
Goal 6.0° 79%ile
Shoulder Abduction @ FFS +0.6 mph
Current 24.0° 22%ile
Goal 32.7° 52%ile
Total Potential Velocity Gain: +21.2 mph → Target: 90 mph
Working Toward 90 mph
You need +32.0 mph to reach your target.
Improving to 90th percentile in the metrics above can provide +21.2 mph.
10.8 mph gap remaining
Set an achievable interim target of 79 mph, then reassess.
🎖️

TopVelocity Ranking

Based on the TopVelocity Evaluation System

Current Rank
Unranked
Youth Level 3 1/16 metrics
Youth Level 2 7/16 metrics
Youth Level 1 11/16 metrics
Vertical Jump 22.0 / ≥17.0
Broad Jump 78.0 / ≥72.0
10 Yard Sprint 2.0 / ≤2.1
Total Body Strength 220.0 / ≥200.0
Right Hip Internal Rotation 30.0 / ≥30.0
Left Hip Internal Rotation 25.0 / ≥30.0
Right Hip Extension 15.0 / ≥15.0
Left Hip Extension 15.0 / ≥15.0
Right Hip Flexion 90.0 / ≥80.0
Left Hip Flexion 90.0 / ≥80.0
Right Hip Abduction 40.0 / ≥45.0
Left Hip Abduction 40.0 / ≥45.0
Right Trunk Rotation 60.0 / ≥65.0
Left Trunk Rotation 50.0 / ≥65.0
Right Dorsiflexion 15.0 / ≥10.0
Left Dorsiflexion 20.0 / ≥10.0
📊 Performance Scores (Percentile)
🔄
57
Mobility
💪
17
Shoulder
18
Power
⚖️
5
Balance
🎯
52
Mechanics
🏆
30
Overall
📏

Anthropometric

3 metrics measured

6
Overall
62.0 in
in
Body Height
3th Percentile
Elite (90th): 75.0 in
Difference: -13.0 in
143 lbs
lbs
Body Weight
10th Percentile
Elite (90th): 216 lbs
Difference: -73 lbs
62.5 in
in
Wing Span
4th Percentile
Elite (90th): 76.0 in
Difference: -13.5 in
🔄

Mobility

23 metrics measured

57
Overall
15 °
°
Right Dorsiflexion
75th Percentile
Elite (90th): 19 °
Difference: -4 °
20 °
°
Left Dorsiflexion
95th Percentile
Elite (90th): 18 °
Difference: ✓ Elite
45 °
°
Right Plantar Flexion
5th Percentile
Elite (90th): 75 °
Difference: -30 °
45 °
°
Left Plantar Flexion
5th Percentile
Elite (90th): 75 °
Difference: -30 °
30 °
°
Right Hip Internal Rotation
50th Percentile
Elite (90th): 40 °
Difference: -10 °
25 °
°
Left Hip Internal Rotation
25th Percentile
Elite (90th): 40 °
Difference: -15 °
40 °
°
Right Hip External Rotation
50th Percentile
Elite (90th): 54 °
Difference: -14 °
50 °
°
Left Hip External Rotation
90th Percentile
Elite (90th): 50 °
Difference: ✓ Elite
15 °
°
Right Hip Extension
25th Percentile
Elite (90th): 25 °
Difference: -10 °
15 °
°
Left Hip Extension
25th Percentile
Elite (90th): 25 °
Difference: -10 °
90 °
°
Right Hip Flexion
75th Percentile
Elite (90th): 95 °
Difference: -5 °
90 °
°
Left Hip Flexion
75th Percentile
Elite (90th): 95 °
Difference: -5 °
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
75 °
°
Left Shoulder Internal Rotation
85th Percentile
Elite (90th): 80 °
Difference: -5 °
120 °
°
Right Shoulder External Rotation
90th Percentile
Elite (90th): 120 °
Difference: ✓ Elite
100 °
°
Left Shoulder External Rotation
50th Percentile
Elite (90th): 115 °
Difference: -15 °
35 °
°
Right Shoulder Horizontal Abduction
90th Percentile
Elite (90th): 35 °
Difference: ✓ Elite
35 °
°
Left Shoulder Horizontal Abduction
90th Percentile
Elite (90th): 35 °
Difference: ✓ Elite
55 °
°
Trunk Extension
95th Percentile
Elite (90th): 50 °
Difference: ✓ Elite
60 °
°
Right Trunk Rotation
50th Percentile
Elite (90th): 75 °
Difference: -15 °
50 °
°
Left Trunk Rotation
25th Percentile
Elite (90th): 70 °
Difference: -20 °
💪

Strength & Power

10 metrics measured

18
Overall
22.0 in
in
Vertical Jump
20th Percentile
Elite (90th): 30.0 in
Difference: -8.0 in
78 in
in
Broad Jump
8th Percentile
Elite (90th): 108 in
Difference: -30 in
68 in
in
Right Lateral Broad Jump
10th Percentile
Elite (90th): 86 in
Difference: -18 in
66 in
in
Left Lateral Broad Jump
7th Percentile
Elite (90th): 86 in
Difference: -20 in
1.950 s
s
10 Yard Sprint
6th Percentile
Elite (90th): 1.880 s
Difference: +0.070 s
220 lbs
lbs
Total Body Strength
4th Percentile
Elite (90th): 600 lbs
Difference: -380 lbs
54 lbs
lbs
Right Grip Strength
4th Percentile
Elite (90th): 130 lbs
Difference: -76 lbs
56 lbs
lbs
Left Grip Strength
4th Percentile
Elite (90th): 130 lbs
Difference: -74 lbs
575 W
W
Right Rotational Power
38th Percentile
Elite (90th): 973 W
Difference: -398 W
740 W
W
Left Rotational Power
75th Percentile
Elite (90th): 909 W
Difference: -169 W
⚖️

Balance

6 metrics measured

5
Overall
19 in
in
Right Y-Balance 1
5th Percentile
Elite (90th): 36 in
Difference: -17 in
20 in
in
Right Y-Balance 2
4th Percentile
Elite (90th): 47 in
Difference: -27 in
23 in
in
Right Y-Balance 3
4th Percentile
Elite (90th): 46 in
Difference: -23 in
20 in
in
Left Y-Balance 1
7th Percentile
Elite (90th): 37 in
Difference: -17 in
22 in
in
Left Y-Balance 2
4th Percentile
Elite (90th): 46 in
Difference: -24 in
22 in
in
Left Y-Balance 3
4th Percentile
Elite (90th): 47 in
Difference: -25 in
🎯

Shoulder Strength

4 metrics measured

17
Overall
176 °
°
Right Shoulder Flexion
20th Percentile
Elite (90th): 209 °
Difference: -33 °
25 lbs
lbs
Right Shoulder Internal Rotation Strength
12th Percentile
Elite (90th): 55 lbs
Difference: -30 lbs
24 lbs
lbs
Right Shoulder External Rotation Strength
17th Percentile
Elite (90th): 49 lbs
Difference: -25 lbs
20 lbs
lbs
Scaption Right Back
19th Percentile
Elite (90th): 36 lbs
Difference: -16 lbs
⚙️

Mechanics

15 metrics measured

52
Overall
10 °
°
Hip Shoulder Separation Before Leg Drive
54th Percentile
Elite (90th): 21 °
Difference: -11 °
13 °
°
Trunk Flexion Before Leg Drive
4th Percentile
Elite (90th): 32 °
Difference: -19 °
54 °
°
Drive Knee Extension Before Leg Drive
23th Percentile
Elite (90th): 70 °
Difference: -16 °
50 °
°
Left Knee Flexion Front Foot Strike
55th Percentile
Elite (90th): 58 °
Difference: -8 °
103 °
°
Dominate Arm External Rotation Front Foot Strike
93th Percentile
Elite (90th): 97 °
Difference: ✓ Elite
24 °
°
Dominate Arm Shoulder Abduction Front Foot Strike
21th Percentile
Elite (90th): 45 °
Difference: -21 °
429 °/s
°/s
Pelvis Rotation Speed Front Foot Strike
37th Percentile
Elite (90th): 673 °/s
Difference: -244 °/s
338 °/s
°/s
Trunk Rotation Speed Front Foot Strike
21th Percentile
Elite (90th): 756 °/s
Difference: -418 °/s
182 °
°
Dominate Arm External Rotation Maximum External Rotation
86th Percentile
Elite (90th): 184 °
Difference: -2 °
4 °
°
Dominate Arm Shoulder Abduction Maximum External Rotation
75th Percentile
Elite (90th): 9 °
Difference: -5 °
704 °/s
°/s
Dominate Arm External Rotation Speed Maximum External Rotation
61th Percentile
Elite (90th): 1238 °/s
Difference: -534 °/s
32 °
°
Trunk Flexion Ball Release
60th Percentile
Elite (90th): 42 °
Difference: -10 °
98 °
°
Dominate Arm Shoulder Abduction Ball Release
62th Percentile
Elite (90th): 105 °
Difference: -7 °
-10 °
°
Dominate Arm Shoulder Horizontal Abduction Ball Release
66th Percentile
Elite (90th): -2 °
Difference: -8 °
47 °
°
Dominate Arm Extension Ball Release
54th Percentile
Elite (90th): 70 °
Difference: -23 °

Pitch Metrics

4 metrics measured

12
Overall
6 in
in
Vertical Break
4th Percentile
Elite (90th): 20 in
Difference: -14 in
-4 in
in
Horizontal Break
17th Percentile
Elite (90th): 14 in
Difference: -18 in
1649 rpm
rpm
Total Spin
19th Percentile
Elite (90th): 2178 rpm
Difference: -529 rpm
58 mph
mph
Total Velocity
4th Percentile
Elite (90th): 86 mph
Difference: -28 mph
🎯

Brent Pourciau's Analysis

Road to 90

Personalized roadmap for Emmitt Jefferson

📊 The Overview
Alright Emmitt, here's your Road to 90. You're currently sitting at 58 mph, which means you need about 32.0 mph to hit your target of 90. You're early in your development journey at the 30th 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
Emmitt, let me be real with you — this is actually exciting news. You're throwing 58 mph, but based on your physical metrics, the AI model says you should be around 68.8 mph. That 10.8 mph gap? That's not a problem — that's POTENTIAL. It means once we clean up your mechanics and movement patterns, you've got velocity sitting there waiting to be unlocked.
Your mechanics efficiency is at the 3th percentile — and honestly, this is where the opportunity is. Your physical tools are there, but your delivery isn't converting them efficiently. The good news? Mechanical improvements often come faster than physical gains. Once we optimize your sequencing and timing, you'll see immediate velocity jumps.
🎯 Your Biggest Opportunities
Based on the AI analysis, here are your biggest opportunities to add velocity:
Broad Jump +2.1 mph
Current: 78.0" (5th %ile) Target: 92.0" (35th %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: 134.0" (6th %ile) Target: 150.0" (36th %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: 56.0 lbs (2th %ile) Target: 95.0 lbs (32th %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 +7.3 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?
Let me be honest with you — getting to 90 mph is a big goal. The improvements I've outlined give you about +21.2 mph, which would put you around 79 mph. That's a great interim target. The remaining 10.8 mph will require elite-level development — we're talking about pushing past 90th percentile on multiple metrics. Set 79 mph as your first milestone, crush that, then we'll re-evaluate and map out the next phase.
🚀 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 Grip Strength. Together, these account for about 4.8 mph of your velocity gap.
Broad Jump +3 mph
Current 78 in
Percentile 8th
Target 102 in
To Gain +24 in
Left Grip Strength +1.8 mph
Current 56 lbs
Percentile 4th
Target 113.8 lbs
To Gain +57.8 lbs
🔧 Supporting Work
After that, it's about the supporting package: left hip internal rotation (mobility), Right Grip Strength, Total Body Strength (power/stability). 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 Pelvis Rotation Speed Front Foot Strike and Trunk 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.
Pelvis Rotation Speed Front Foot Strike +1.2 mph
Current Percentile 37th
🎯 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.
🚀 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