@KassWilliams_2 22.4
Hand Speed (max)
8/15/26
CLASS OF 2029
OF
LHP
Kass
Williams
Greenville Senior (HS) • SC
5' 10" • 162.7LBS
L/L • 16yr 6mo
Travel Team: Team Elite Platinum/West End Cardinals
5' 10" • 162.7LBSL/L • 16yr 6mo
Travel Team: Team Elite Platinum/West End Cardinals
Rankings
2029 National
Rankings available to Premium Subscriber
2029 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
69.7
Bat Speed (max)
7/14/26
20.2
Rot. Acc (max)
7/14/26
13
Hard Hit %
7/14/26
90.5
Exit Velocity (max)
7/14/26
83
Exit Velocity (avg)
7/14/26
301
Distance (max)
7/14/26
50
Sweet Spot %
7/14/26
7.21
60-yd
7/16/25
3.99
30-yd
7/16/25
1.70
10-yd
8/15/26
19.0
Run speed (max)
7/16/25
74
INF Velo
8/15/26
77
OF Velo
7/14/26
-
C Velo
-
Pop Time
Fastball
76.2
Velocity (max)
7/14/26
70.8 - 75.3
Velo Range
7/14/26
1927
Spin Rate (avg)
7/16/25
Changeup
65 - 68
Velo Range
8/15/26
1368
Spin Rate (avg)
7/16/25
Curveball
61.2 - 63.2
Velo Range
8/15/26
1996
Spin Rate (avg)
7/16/25
Slider
62.5 - 64.3
Velo Range
7/16/25
1722
Spin Rate (avg)
7/14/26
Physical
2026
2025
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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.
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.
Positional Tools
2026
2025
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
74.0
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
77.0
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
76.0
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).
90.5
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
79.7
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
301
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
142
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
13.6711
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).
88.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
75.4
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
294
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
226
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
30.6037
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.
Top Prospect Games (Invite-Only)
Aug 15, 2026
Trackman - Hitting
87.6
Exit Velocity (max)
76.8
Exit Velocity (avg)
80
Distance (avg)
268
Distance (max)
Sweet Spot %
Fly Ball %
Ground Ball %
Team South Carolina Trials: Upstate (2027-2029s)
Jul 14, 2026
Trackman - Hitting
90.5
Exit Velocity (max)
83.0
Exit Velocity (avg)
213
Distance (avg)
301
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Team Carolina Trials: Upstate (2026-2028 Grads)
Jul 16, 2025
Trackman - Hitting
88.4
Exit Velocity (max)
75.4
Exit Velocity (avg)
226
Distance (avg)
294
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2026
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
22.4
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
21.2
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
69.7
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
64.3
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.
Top Prospect Games (Invite-Only)
Aug 15, 2026
Blast - Hitting
22.4
Hand Speed (max)
21.1
Hand Speed (avg)
64.9
Bat Speed (max)
61.2
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Team South Carolina Trials: Upstate (2027-2029s)
Jul 14, 2026
Blast - Hitting
22.1
Hand Speed (max)
21.3
Hand Speed (avg)
69.7
Bat Speed (max)
66.9
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).
76.2
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
73.4
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).
1877
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.
25.6
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).
61.5
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).
1804
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).
66.5
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).
1203
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).
62.3
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).
1722
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).
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).
70.6
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).
1927
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.
27.3
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).
61.3
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).
1996
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).
66.1
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).
1368
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).
63.3
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).
1711
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).
Top Prospect Games (Invite-Only)
Aug 15, 2026
Trackman - Fastball
74.6
Velocity (max)
73.1 - 74.1
Velo Range
71.9
Eff Velocity (avg)
1,981
Spin Rate (max)
1,910
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
63.2
Velocity (max)
61.2 - 63.2
Velo Range
60.0
Eff Velocity (avg)
1,908
Spin Rate (max)
1,829
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
68.4
Velocity (max)
65.3 - 67.7
Velo Range
65.2
Eff Velocity (avg)
1,254
Spin Rate (max)
1,170
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Team South Carolina Trials: Upstate (2027-2029s)
Jul 14, 2026
Trackman - Fastball
76.2
Velocity (max)
70.8 - 75.3
Velo Range
70.9
Eff Velocity (avg)
1,910
Spin Rate (max)
1,802
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
61.1
Velocity (max)
60.4 - 61.1
Velo Range
58.3
Eff Velocity (avg)
1,835
Spin Rate (max)
1,770
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
62.4
Velocity (max)
62.1 - 62.4
Velo Range
59.7
Eff Velocity (avg)
1,768
Spin Rate (max)
1,722
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
67.9
Velocity (max)
65.5 - 67.8
Velo Range
64.9
Eff Velocity (avg)
1,340
Spin Rate (max)
1,257
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Team Carolina Trials: Upstate (2026-2028 Grads)
Jul 16, 2025
Trackman - Fastball
72.0
Velocity (max)
69.8 - 71.6
Velo Range
67.9
Eff Velocity (avg)
1,994
Spin Rate (max)
1,927
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
61.7
Velocity (max)
61.0 - 61.7
Velo Range
57.9
Eff Velocity (avg)
2,044
Spin Rate (max)
1,996
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
64.5
Velocity (max)
62.5 - 64.3
Velo Range
58.7
Eff Velocity (avg)
1,791
Spin Rate (max)
1,711
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
66.5
Velocity (max)
65.7 - 66.5
Velo Range
62.9
Eff Velocity (avg)
1,516
Spin Rate (max)
1,368
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
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
2026
2025
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
76.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.2
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
61.2
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.8
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
62.0
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)
71.0
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
61.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.0
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
63.5
2026
2025
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.7
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.99
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.26
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.
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
3.99
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.21
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.
Team South Carolina Trials: Upstate (2027-2029s)
Jul 14, 2026
Vald
1.73
10-yd
4.06
30-yd
7.34
60-yd
18.7
Run speed (max)
1.33
RSI (max)
21.9
Jump Height (max)
Game Performance
Notes
News
- South Carolina Class of 2029 Rankings: Newcomers - Sep 4, 2026
- 2026 Top Prospect Games: Vald Athletic Testing Metrics - Aug 27, 2026
- 2026 Top Prospect Games: Blast Motion Leaders - Aug 26, 2026
- 2026 Top Prospect Games: Trackman Hitting Leaders - Aug 24, 2026
- 2026 Top Prospect Games: Position Player Quick Hitters - Aug 20, 2026
- 2026 Top Prospect Games: Statistical Analysis - Aug 19, 2026
- Team South Carolina Trials Upstate 2026: Vald Athletic Testing Metrics - Jul 24, 2026
- Team South Carolina Trials Upstate 2026: Trackman Pitching Leaders - Jul 23, 2026
- Team South Carolina Trials Upstate 2026: Trackman Hitting Leaders - Jul 22, 2026
- Team South Carolina Trials Upstate 2026: Statistical Analysis - Jul 17, 2026
- Team Carolina Trials Upstate 2025: Pitcher Scouting Reports - Oct 10, 2025
- Team Carolina Trials Upstate 2025: Outfielders Scouting Reports - Oct 7, 2025
- Team Carolina Trials Upstate 2025: Superlatives - Pitchers - Jul 28, 2025
- Team Carolina Trials Upstate 2025: Trackman Pitching Leaders - Jul 22, 2025
- Team Carolina Trials Upstate 2025: Trackman Hitting Leaders - Jul 21, 2025
- Team Carolina Trials Upstate 2025: Data Dive - Jul 17, 2025
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Positional Profile: OF/LHP
Body: 5-10, 150-pounds. Lean build. Still room to fill out.
Delivery: Quick sidesaddle windup. Drop and drive delivery.
Arm Action: LH. Long armer in the backswing and slingign motion through a low 3/4 release point.
FB: T72, 70-72 mph. Generates slight rising action. T1994, 1927 average rpm.
CB: 61-62 mph. 11/5 movement with late break. T2044, 1996 average rpm.
SL: 63-64 mph. Small break. T1791, 1711 average rpm.
CH: 66-66 mph. Maintains arm speed. T1516, 1368 average rpm.
ATH: 7.21 runner in the 60. 3.99 in the30 yard split. 18.70 max vertical.
Positional Profile: OF/LHP
Body: 5-10, 150-pounds. Lean build. Still room to fill out.
Hit: LHH. Slightly open setup. Long stride forward during load. Short level path through the zone.
Power: 88 max exit velocity, averaged 75.4 mph. 294' max distance.
Arm: LH. OF-76 mph. Average arm strength from 3/4 arm slot.
Defense: Fields out infront. Moves well through the ball.
ATH: 7.21 runner in the 60. 3.99 in the30 yard split. 18.70 max vertical.