19.3
Hand Speed (max)
9/06/25
CLASS OF 2028
SS
RHP
Karsten
Blum
Park City (HS) • UT
6' 0" • 170LBS
R/R • 16yr 4mo
Travel Team: Utah Ghost 2028
6' 0" • 170LBS
R/R • 16yr 4mo
Travel Team: Utah Ghost 2028
Rankings
2028 National
Rankings available to Premium Subscriber
2028 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
65.6
Bat Speed (max)
9/06/25
9.6
Rot. Acc (max)
9/06/25
17
Hard Hit %
9/06/25
92.3
Exit Velocity (max)
9/06/25
84.2
Exit Velocity (avg)
8/11/26
311
Distance (max)
9/06/25
58
Sweet Spot %
9/06/25
7.42
60-yd
8/11/26
4.23
30-yd
9/06/25
1.68
10-yd
8/11/26
17.1
Run speed (max)
9/06/25
77
INF Velo
9/06/25
-
OF Velo
-
C Velo
-
Pop Time
Fastball
76.3
Velocity (max)
8/11/26
72.2 - 76.1
Velo Range
8/11/26
2065
Spin Rate (avg)
8/11/26
Changeup
69.2 - 69.7
Velo Range
8/11/26
1408
Spin Rate (avg)
9/06/25
Curveball
64.1 - 64.7
Velo Range
9/06/25
2049
Spin Rate (avg)
9/06/25
Slider
61.5 - 67.7
Velo Range
8/11/26
2034
Spin Rate (avg)
9/06/25
Positional Tools
2025
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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).
77.0
Hitting
2026
2025
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
90.7
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
84.2
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).
119
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
4.5434
Hard Hit %
Percentage of batted balls with exit velocities over 90 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).
92.3
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
82.5
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
311
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
162
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
12.0545
Hard Hit %
Percentage of batted balls with exit velocities over 90 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.
Ghost Utah Scout Day
Aug 11, 2026
Trackman - Hitting
90.7
Exit Velocity (max)
84.2
Exit Velocity (avg)
119
Distance (avg)
255
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Salt Lake Fall ID
Sep 6, 2025
Trackman - Hitting
92.3
Exit Velocity (max)
82.5
Exit Velocity (avg)
162
Distance (avg)
311
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2025
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.
18.6
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
65.6
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
63.2
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.
Salt Lake Fall ID
Sep 6, 2025
Blast - Hitting
19.3
Hand Speed (max)
18.6
Hand Speed (avg)
65.6
Bat Speed (max)
63.2
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2026
2025
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
76.3
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
74.1
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).
2065
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.
27.9
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
69.4
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).
1343
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).
64.6
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).
2008
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).
75.2
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
74.0
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).
1991
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.
26.9
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).
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).
2049
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).
68.2
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).
1408
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).
66.5
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).
2034
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).
Ghost Utah Scout Day
Aug 11, 2026
Trackman - Fastball
76.3
Velocity (max)
72.2 - 76.1
Velo Range
74.6
Eff Velocity (avg)
2,170
Spin Rate (max)
2,065
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
70.4
Velocity (max)
61.5 - 67.7
Velo Range
64.2
Eff Velocity (avg)
2,142
Spin Rate (max)
2,008
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
69.8
Velocity (max)
69.2 - 69.7
Velo Range
69.5
Eff Velocity (avg)
1,452
Spin Rate (max)
1,343
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Salt Lake Fall ID
Sep 6, 2025
Trackman - Fastball
75.2
Velocity (max)
73.1 - 75.0
Velo Range
74.3
Eff Velocity (avg)
2,037
Spin Rate (max)
1,991
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
64.9
Velocity (max)
64.1 - 64.7
Velo Range
64.7
Eff Velocity (avg)
2,069
Spin Rate (max)
2,049
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
67.2
Velocity (max)
65.7 - 67.2
Velo Range
66.3
Eff Velocity (avg)
2,071
Spin Rate (max)
2,034
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
68.8
Velocity (max)
67.7 - 68.7
Velo Range
68.5
Eff Velocity (avg)
1,497
Spin Rate (max)
1,408
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
2026
2025
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
Slider
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Slider
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
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
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
Game Performance
2026
2025
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.68
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.42
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.8
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.23
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.81
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.
Salt Lake Fall ID
Sep 6, 2025
Vald
1.80
10-yd
4.23
30-yd
7.81
60-yd
17.1
Run speed (max)
1.38
RSI (max)
21.2
Jump Height (max)
Vizual Edge
2025
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.
72.88
Pitch Ai
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Physical
2025
Grip Strgth (LH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (RH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.