88
Velocity (max)
9/15/23
CLASS OF 2026
RHP
1B
Aaron
Dierks
WEST SPRINGFIELD HIGH (HS) • VA
6' 3" • 205LBS
R/R • 16yr 7mo
Travel Team: Padres Scout 16U
6' 3" • 205LBS
R/R • 16yr 7mo
Travel Team: Padres Scout 16U
Rankings
2026 National
Rankings available to Premium Subscriber
2026 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
83 - 86
Velo Range
9/15/23
2193
Spin Rate (avg)
2/11/24
Changeup
77.6 - 79.4
Velo Range
6/11/23
1594
Spin Rate (avg)
2/11/24
Curveball
68.7 - 69.2
Velo Range
6/11/23
2285
Spin Rate (avg)
6/11/23
Slider
73 - 75
Velo Range
9/15/23
2425
Spin Rate (avg)
2/11/24
87.2
Exit Velocity (max)
6/11/23
81.5
Exit Velocity (avg)
6/11/23
316
Distance (max)
6/11/23
83
Sweet Spot %
2/11/24
18.7
Hand Speed (max)
6/11/23
64.5
Bat Speed (max)
6/11/23
8.9
Rot. Acc (max)
2/11/24
-
Hard Hit %
-
60
4.25
30-yd
2/11/24
1.79
10-yd
2/11/24
16.6
Run speed (max)
2/11/24
79
INF Velo
2/11/24
-
OF Velo
-
C Velo
-
Pop Time
Positional Tools
2024
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Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
79.0
Hitting
2024
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
83.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
78.7
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
296
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
205
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
22.4
Hard Hit %
Percentage of batted balls with exit velocities over 95 MPH in the given event year.
Sweet Spot %
Percentage of batted balls in the given event year with a launch angle between 8° and 32°.
Line Drive %
Percentage of batted balls with launch angles between 10 and 25 degrees in the given event year.
Fly Ball %
Percentage of batted balls with launch angles between 25 and 50 degrees in the given event year.
Ground Ball %
Percentage of batted balls with launch angles below 10 degrees in the given event year.
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
87.2
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
81.5
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
316
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
195
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
20.8
Hard Hit %
Percentage of batted balls with exit velocities over 95 MPH in the given event year.
Sweet Spot %
Percentage of batted balls in the given event year with a launch angle between 8° and 32°.
Line Drive %
Percentage of batted balls with launch angles between 10 and 25 degrees in the given event year.
Fly Ball %
Percentage of batted balls with launch angles between 25 and 50 degrees in the given event year.
Ground Ball %
Percentage of batted balls with launch angles below 10 degrees in the given event year.
2024 VA/DC Preseason All State Session II - NOVA
Feb 11, 2024
Trackman - Hitting
83.4
Exit Velocity (max)
78.7
Exit Velocity (avg)
205
Distance (avg)
296
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Scout Day: Stars Baseball
Jun 11, 2023
Trackman - Hitting
87.2
Exit Velocity (max)
81.5
Exit Velocity (avg)
195
Distance (avg)
316
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2024
2023
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
18.1
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
17.1
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
63.8
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
59.5
Rotational Acceleration Max
The highest Rotational Acceleration of any swing in the given event year.
Rotational Acceleration Avg
The average Rotational Acceleration for all swings in the given event year.
On-Plane Efficiency Max
The highest On-Plane Efficiency of any swing in the given event year.
On-Plane Efficiency Avg
The average On-Plane Efficiency for all swings in the given event year.
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
18.7
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
17.6
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
64.5
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
61.4
Rotational Acceleration Max
The highest Rotational Acceleration of any swing in the given event year.
Rotational Acceleration Avg
The average Rotational Acceleration for all swings in the given event year.
On-Plane Efficiency Max
The highest On-Plane Efficiency of any swing in the given event year.
On-Plane Efficiency Avg
The average On-Plane Efficiency for all swings in the given event year.
2024 VA/DC Preseason All State Session II - NOVA
Feb 11, 2024
Blast - Hitting
18.1
Hand Speed (max)
17.1
Hand Speed (avg)
63.8
Bat Speed (max)
59.5
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Scout Day: Stars Baseball
Jun 11, 2023
Blast - Hitting
18.7
Hand Speed (max)
17.6
Hand Speed (avg)
64.5
Bat Speed (max)
61.4
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
84.8
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
84.0
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).
2193
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.
26.1
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).
78.6
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).
1594
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).
72.0
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).
2425
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).
83.9
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
83.1
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).
2036
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.
24.5
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).
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
68.9
Curveball
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).
2285
Curveball
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).
78.5
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).
1109
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).
2024 VA/DC Preseason All State Session II - NOVA
Feb 11, 2024
Trackman - Fastball
84.8
Velocity (max)
82.8 - 84.8
Velo Range
84.1
Eff Velocity (avg)
2,278
Spin Rate (max)
2,193
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
72.5
Velocity (max)
71.5 - 72.5
Velo Range
70.9
Eff Velocity (avg)
2,486
Spin Rate (max)
2,425
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
79.3
Velocity (max)
77.7 - 79.3
Velo Range
79.2
Eff Velocity (avg)
1,857
Spin Rate (max)
1,594
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Scout Day: Stars Baseball
Jun 11, 2023
Trackman - Fastball
83.9
Velocity (max)
82.2 - 83.9
Velo Range
83.0
Eff Velocity (avg)
2,197
Spin Rate (max)
2,036
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Curveball
69.3
Velocity (max)
68.7 - 69.2
Velo Range
67.8
Eff Velocity (avg)
2,365
Spin Rate (max)
2,285
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
79.4
Velocity (max)
77.6 - 79.4
Velo Range
78.8
Eff Velocity (avg)
1,124
Spin Rate (max)
1,109
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Pitch Scores
Pitching Velos
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
85.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
84.0
Changeup
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)
72.5
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
88.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
83.3
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
68.8
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.8
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.0
Game Performance
2024
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.79
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.25
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
Visual Edge
2024
Edge Score
The highest Edge Score within the given year. Edge Score is a comprehensive score that takes the core-six visual skills into account, providing an assessment of an athlete’s overall visual ability.
83.9
Pitch Ai
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Comments
Draft Reports
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Positional Profile: RHP/1B
Body: 6-3, 205-pounds. Lean, projectable frame.
Hit: RHH. Quiet, balanced setup. Simple, uphill barrel path. 59.5 mph bat speed with 7 G's of rotational acceleration.
Power: 83 max exit velocity, averaged 78.7 mph. 296' max distance.
Arm: RH. INF-79 mph. Short, compact arm action.
Defense: Consistent hands, with in control footwork.
ATH: 1.79 and 4.25 in the 10 and 30 yard splits. 23.60 max vertical.
Positional Profile: RHP/1B
Body: 6-3, 205-pounds. Lean, projectable frame.
Delivery: Stretch only delivery with some effort.
Arm Action: RH. Short arm action from H 3/4 slot.
FB: T85, 83-85 mph. Fastball has late life. T2278, 2193 average rpm.
SL: 72-73 mph. T2486, 2425 average rpm.
CH: 78-79 mph. T1857, 1594 average rpm.
ATH: 1.79 and 4.25 in the 10 and 30 yard splits. 23.60 max vertical.