19.3
Hand Speed (max)
6/27/23
CLASS OF 2027
OF
RHP
Zack
Ziemke
St. Johns Jesuit (HS) • OH
6' 1" • 165LBS
R/R • 17yr 8mo
Travel Team: Demand Command
6' 1" • 165LBS
R/R • 17yr 8mo
Travel Team: Demand Command
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
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Best Of Stats
63.7
Bat Speed (max)
6/27/23
12.9
Rot. Acc (max)
1/26/25
-
Hard Hit %
81.9
Exit Velocity (max)
1/26/25
73.3
Exit Velocity (avg)
1/26/25
255
Distance (max)
1/28/24
64
Sweet Spot %
1/28/24
7.17
60-yd
1/26/25
-
30-yd
-
10-yd
16.2
Run speed (max)
1/28/24
-
INF Velo
85
OF Velo
1/26/25
-
C Velo
-
Pop Time
Fastball
81
Velocity (max)
6/12/25
79 - 81
Velo Range
6/12/25
1899
Spin Rate (avg)
6/27/23
Changeup
71 - 74
Velo Range
7/03/25
1662
Spin Rate (avg)
6/27/23
Curveball
70 - 71
Velo Range
6/19/25
1986
Spin Rate (avg)
1/26/25
Positional Tools
2025
2024
2023
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Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
85.0
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
79.0
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.67
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
78.0
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.
10.6
Hitting
2025
2024
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
81.9
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
73.3
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
240
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
112
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
9.165
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).
80.0
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
70.1
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
255
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
181
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
26.3018
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).
81.5
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
68.2
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
250
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
116
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
10.5699
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.
Scout Day: Demand Command 1.26.25
Jan 26, 2025
Trackman - Hitting
81.9
Exit Velocity (max)
73.3
Exit Velocity (avg)
112
Distance (avg)
240
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Scout Day: Demand Command 1.28.24
Jan 28, 2024
Trackman - Hitting
80.0
Exit Velocity (max)
70.1
Exit Velocity (avg)
181
Distance (avg)
255
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
2023 Ohio Future 50 (Invite Only)
Jun 27, 2023
Trackman - Hitting
81.5
Exit Velocity (max)
68.2
Exit Velocity (avg)
116
Distance (avg)
250
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2025
2024
2023
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
19.0
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
16.8
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
59.3
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
57.8
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.
18.2
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
17.3
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
58.1
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
56.1
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.
19.3
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
17.8
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
63.7
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
58.6
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.
Scout Day: Demand Command 1.26.25
Jan 26, 2025
Blast - Hitting
19.0
Hand Speed (max)
16.8
Hand Speed (avg)
59.3
Bat Speed (max)
57.8
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Scout Day: Demand Command 1.28.24
Jan 28, 2024
Blast - Hitting
18.2
Hand Speed (max)
17.3
Hand Speed (avg)
58.1
Bat Speed (max)
56.1
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
2023 Ohio Future 50 (Invite Only)
Jun 27, 2023
Blast - Hitting
19.3
Hand Speed (max)
17.8
Hand Speed (avg)
63.7
Bat Speed (max)
58.6
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2025
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
80.8
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
78.1
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).
1838
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.
23.5
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).
68.0
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).
1986
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).
72.4
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).
1649
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).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
77.5
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
76.0
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).
1821
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.
24.0
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).
64.4
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).
1898
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).
69.1
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).
1515
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).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
74.6
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
71.3
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).
1899
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.
26.6
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).
59.2
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).
1830
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).
63.3
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).
1662
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).
Scout Day: Demand Command 1.26.25
Jan 26, 2025
Trackman - Fastball
80.8
Velocity (max)
76.4 - 79.7
Velo Range
75.6
Eff Velocity (avg)
1,923
Spin Rate (max)
1,838
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
69.1
Velocity (max)
67.3 - 68.8
Velo Range
64.7
Eff Velocity (avg)
2,054
Spin Rate (max)
1,986
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
73.7
Velocity (max)
71.4 - 73.4
Velo Range
69.6
Eff Velocity (avg)
1,685
Spin Rate (max)
1,649
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: Demand Command 1.28.24
Jan 28, 2024
Trackman - Fastball
77.5
Velocity (max)
75.0 - 77.0
Velo Range
75.4
Eff Velocity (avg)
1,916
Spin Rate (max)
1,821
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
66.7
Velocity (max)
62.6 - 66.2
Velo Range
62.7
Eff Velocity (avg)
1,999
Spin Rate (max)
1,898
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
70.2
Velocity (max)
68.2 - 70.1
Velo Range
69.0
Eff Velocity (avg)
1,545
Spin Rate (max)
1,515
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
2023 Ohio Future 50 (Invite Only)
Jun 27, 2023
Trackman - Fastball
74.6
Velocity (max)
70.3 - 72.4
Velo Range
68.7
Eff Velocity (avg)
2,014
Spin Rate (max)
1,899
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
61.3
Velocity (max)
57.7 - 60.7
Velo Range
56.2
Eff Velocity (avg)
1,952
Spin Rate (max)
1,830
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
65.4
Velocity (max)
62.0 - 64.8
Velo Range
60.2
Eff Velocity (avg)
1,786
Spin Rate (max)
1,662
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
2025
2024
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
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ 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
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
Pitching Velos
2025
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
81.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
79.2
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
67.1
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
71.8
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
78.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.0
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
62.8
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
67.0
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
72.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
70.0
Game Performance
2024
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.58
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
2025
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.17
Vizual Edge
Pitch Ai
Notes
News
- 2025 Scout Day: Demand Command - Top Statistical Performers - Jan 27, 2025
- 2024 Scout Day: Demand Command Advanced Metrics: Hitting Leaderboard - Jan 29, 2024
- 2024 Scout Day: Demand Command Advanced Metrics: Trackman Analytics - Pitching Leaderboard - Jan 29, 2024
- Results From 2024 Scout Day: Demand Command - Jan 29, 2024
- 2023 Future 50 Showcase Advanced Metrics: Hitting Leaderboard - Jun 30, 2023
- 2023 Future 50 Showcase Advanced Metrics: Trackman Analytics - Pitching Leaderboard - Jun 30, 2023
- 2023 Ohio Future 50 - Quick Hits - Jun 30, 2023
- Results From 2023 Ohio Future 50 - Jun 28, 2023
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Zack Ziemke: OF/RHP, (2027) St. John's Jesuit, OH. 6-foot, 155-pound. (56.1 mph bat speed average). (17.3 mph hand speed average). Began in a balanced wide stance with a controlled load, then used a small controlled stride. Bat speed was developing, used an uphill swing plane and high good extension on his finish. In his round he found multiple barrels. Gap to gap approach. From the outfield, he made throws to the infield at velocities up to 79 mph. Projectable on the mound, showed good arm speed, he had a consistent quick arm action and a high ¾ arm angle. Drop-and-drive type pitcher and shows easy effort. He has in line shoulders and an athletic strong balance point. Lands square with an athletic finish. (Max spin 1916; Avg 1821).
Zack Ziemke: OF/RHP, (2027) St. John's Jesuit, OH. 5-foot-11, 135-pound. (58.6 mph bat speed average). (17.8 mph hand speed average). Started in a tall stance with a smooth load, then used a short stride. Had developing bat speed, level swing plane and good extension on his finish. Up the middle opposite field approach. In the outfield, his best throws to the infield topped out at 78 mph. During the event, ran the 60-yard dash in 7.67. Athletic on the mound, had a high ¾ arm angle and a loose long arm action with good developing arm speed. Drop-and-drive type pitcher who shows easy effort. Has downhill shoulder with a tall consistent balance point. Lands square with balanced an athletic finish. (Max spin 2014; Avg 1898).