82.7
Velocity (max)
3/12/23
CLASS OF 2025
RHP
SS
Donovan
Erfourth
Eisenhower (HS) • MI
5' 11" • 195LBS
R/R • 16yr 10mo
Travel Team: Detroit Metro Stars
5' 11" • 195LBS
R/R • 16yr 10mo
Travel Team: Detroit Metro Stars
Rankings
2025 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
80.6 - 82.2
Velo Range
3/12/23
1935
Spin Rate (avg)
6/20/23
Changeup
74.8 - 75.7
Velo Range
3/12/23
1957
Spin Rate (avg)
3/12/23
Curveball
67 - 69
Velo Range
6/30/22
1754
Spin Rate (avg)
6/20/23
Slider
72.3 - 72.9
Velo Range
3/12/23
2021
Spin Rate (avg)
3/12/23
89.7
Exit Velocity (max)
2/11/23
83.8
Exit Velocity (avg)
2/11/23
317
Distance (max)
2/11/23
75
Sweet Spot %
2/11/23
20.6
Hand Speed (max)
2/11/23
73.6
Bat Speed (max)
6/20/23
9.8
Rot. Acc (max)
2/11/23
-
Hard Hit %
7.48
60
2/11/23
-
30-yd
-
10-yd
16.4
Run speed (max)
2/11/23
-
INF Velo
-
OF Velo
79
C Velo
2/11/23
1.95 - 2.02
Pop Time
2/11/23
Positional Tools
2023
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.50
Pop Time
The athlete's fastest pop time in the given event year. Measured from glove to glove, in seconds (s).
1.95 - 2.02
Catcher Velocity
The athlete's maximum throwing velocity from the catcher position in the given event year. Measured in miles per hour (MPH).
79.0
Power / Speed Score
A simple calculation that divides the athlete’s Exit Velocity Max by the athlete’s 60 Yard Dash time for the given event year. For example, 98 MPH / 7.00s = 14.00.
12.0
Hitting
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
89.7
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
78.9
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
317
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
215
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
23.5
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.
2023 Michigan Top Prospect Games (Invite Only)
Jun 20, 2023
Trackman - Hitting
89.1
Exit Velocity (max)
79.8
Exit Velocity (avg)
179
Distance (avg)
298
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
2023 Northern Michigan Preseason ID
Mar 12, 2023
Trackman - Hitting
84.6
Exit Velocity (max)
73.4
Exit Velocity (avg)
210
Distance (avg)
295
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
2023 Eastern Michigan Preseason ID
Feb 11, 2023
Trackman - Hitting
89.7
Exit Velocity (max)
83.8
Exit Velocity (avg)
293
Distance (avg)
317
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Hitting
2023
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
20.6
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
18.6
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
73.6
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
68.0
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.
2023 Michigan Top Prospect Games (Invite Only)
Jun 20, 2023
Blast - Hitting
19.1
Hand Speed (max)
18.3
Hand Speed (avg)
73.6
Bat Speed (max)
68.1
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
2023 Northern Michigan Preseason ID
Mar 12, 2023
Blast - Hitting
19.5
Hand Speed (max)
18.4
Hand Speed (avg)
70.7
Bat Speed (max)
66.3
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
2023 Eastern Michigan Preseason ID
Feb 11, 2023
Blast - Hitting
20.6
Hand Speed (max)
19.0
Hand Speed (avg)
72.6
Bat Speed (max)
69.1
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.7
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
80.5
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).
1919
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.
23.9
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).
69.0
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).
1754
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
72.7
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).
1909
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
72.2
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).
1942
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).
2023 Michigan Top Prospect Games (Invite Only)
Jun 20, 2023
Trackman - Fastball
82.2
Velocity (max)
78.1 - 82.1
Velo Range
78.8
Eff Velocity (avg)
2,139
Spin Rate (max)
1,935
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
69.0
Velocity (max)
67.6
Eff Velocity (avg)
1,754
Spin Rate (max)
1,754
Spin Rate (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Slider
71.2
Velocity (max)
70.2
Eff Velocity (avg)
1,708
Spin Rate (max)
1,708
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
69.0
Velocity (max)
68.8 - 69.0
Velo Range
67.1
Eff Velocity (avg)
1,863
Spin Rate (max)
1,836
Spin Rate (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2023 Northern Michigan Preseason ID
Mar 12, 2023
Trackman - Fastball
82.7
Velocity (max)
80.6 - 82.2
Velo Range
79.3
Eff Velocity (avg)
1,994
Spin Rate (max)
1,871
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
72.9
Velocity (max)
72.3 - 72.9
Velo Range
70.5
Eff Velocity (avg)
2,031
Spin Rate (max)
2,021
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
75.7
Velocity (max)
74.8 - 75.7
Velo Range
73.3
Eff Velocity (avg)
1,982
Spin Rate (max)
1,957
Spin Rate (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Pitch Scores
2023
Fastball
Hop+
A fastball with hop has a flat approach angle and visually jumps through the zone. When thrown up in the zone, it is more likely to generate a higher swing and miss average. Hop+ of 100 is MLB average.
Fastball
Sink+
A fastball with sink has low backspin and drops through the strike zone. When thrown down in the zone, it is more likely to generate a higher ground ball percentage and lower launch angle. Sink+ of 100 is MLB average.
Fastball
Rise+
A fastball with rise has a high percentage of backspin. When thrown up in the zone, it is more likely to generate a higher fly ball percentage. Rise+ of 100 is MLB average
Pitching Velos
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
80.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
77.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
68.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
69.0
Game Performance
2024
2023
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.48
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
RSi
The reactive strength index measurement of an athlete's explosiveness by comparing their jump height to the ground contact time in between their jumps. On a scale of 0-5.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.48
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
RSi
The reactive strength index measurement of an athlete's explosiveness by comparing their jump height to the ground contact time in between their jumps. On a scale of 0-5.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
2023 Eastern Michigan Preseason ID
Feb 11, 2023
Swift
7.48
60-yd
16.4
Run speed (max)
0.95
RSi (max)
0.95
RSi (avg)
1,520
Jump Power (max)
24.1
Jump Height (max)
23.9
Jump Height (avg)
Visual Edge
Pitch Ai
Notes
News
- 2023 Michigan Top Prospect Games - Quick Hits - Jun 25, 2023
- 2023 Michigan Top Prospect Games Advanced Metrics: Hitting Leaderboard - Jun 25, 2023
- 2023 Michigan Top Prospect Games Advanced Metrics: Trackman Analytics - Pitching Leaderboard - Jun 25, 2023
- Results From 2023 Michigan Top Prospect Games - Jun 22, 2023
- 2023 Northern Michigan Preseason ID - Quick Hits - Mar 16, 2023
- 2023 Northern Michigan Preseason ID Advanced Metrics: Trackman Analytics - Pitching Leaderboard - Mar 14, 2023
- 2023 Northern Michigan Preseason ID Advanced Metrics: Hitting Leaderboard - Mar 14, 2023
- Results From 2023 Northern Michigan Preseason ID - Mar 13, 2023
- 2023 Eastern Michigan Preseason ID - Quick Hits - Feb 15, 2023
- Results From 2023 Eastern Michigan Preseason ID - Feb 12, 2023
- 2023 Eastern Michigan Preseason ID Advanced Metrics: Hitting/Speed Leaderboard - Feb 12, 2023
- 2023 Eastern Michigan Preseason ID Advanced Metrics: Trackman Analytics - Pitching Leaderboard - Feb 12, 2023
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Donovan Erfourth: C/RHP, (2025) Eisenhower, MI. 5-foot-11, 185-pound. (68.1 mph bat speed average). (18.3 mph hand speed average). Began in a balanced wide stance with a small smooth load, then used a short controlled stride. He produced some loud contact and found multiple barrels. Behind the plate, throw downs to second were maxed at 76 mph; has smooth consistent feet, a clean natural transfer, and sure consistent hands. produced pop times of 2.00-2.02. Clean setup with above average flexibility. During the event, recorded a 60 time of 7.5. Solid on the mound, using a short consistent arm action he showed good arm speed from a ¾ arm angle. Drop-and-drive type pitcher and uses some effort. Showed strong balance point with even shoulders. Lands square with a clean balanced finish. (Max spin 2139; Avg 1935).
Donovan Erfourth: C/RHP, (2025) Eisenhower, MI. 5-foot-11, 185-pound. (66.3 mph bat speed average). (18.4 mph hand speed average). Began in a balanced closed stance with a high load, then used a short stride. Was able to create loud contact and found some barrels.Raw capable on the mound, showed an over-the-top arm angle and a long consistent arm action with some developing arm speed. Tall-and-fall type pitcher who uses decent effort. Tall balance point with downhill shoulders. Lands square with a clean finish. (Max spin 1993; Avg 1870).
Donovan Erfourth: RHP/C, (2025) Eisenhower, MI. 5-foot-11, 185-pound. (69.1 mph bat speed average). (19.0 mph hand speed average). Bat speed is raw explosive, has a short swing plane and level finish. Opposite field approach. While catching, he made strong, efficient throws to second at velocities up to 79 mph; showed developing raw hands, developing feet, and a natural lengthy transfer. had quick feet and transfers on his throw downs, recording a 1.95-2.02 pop time. Average flexibility and staggered setup.