83.3
Velocity (max)
7/30/24
CLASS OF 2025
RHP
1B
William
Grellinger
Marquette (HS) • WI
6' 2" • 189LBS
R/R • 17yr 5mo
Travel Team: GRB Stiks
6' 2" • 189LBSR/R • 17yr 5mo
Travel Team: GRB Stiks
Rankings
2025 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
Player has made a commitment?
Tell us where
Best Of Stats
Fastball
81 - 82
Velo Range
2/17/24
2149
Spin Rate (avg)
7/30/24
Changeup
75 - 76
Velo Range
2/17/24
-
Spin Rate (avg)
Curveball
69.5 - 71.2
Velo Range
7/30/24
2087
Spin Rate (avg)
7/30/24
92.2
Exit Velocity (max)
2/17/24
84.1
Exit Velocity (avg)
2/17/24
316
Distance (max)
2/17/24
80
Sweet Spot %
2/17/24
21.1
Hand Speed (max)
2/17/24
68.2
Bat Speed (max)
2/17/24
13.5
Rot. Acc (max)
2/17/24
30
Hard Hit %
2/17/24
7.6
60
2/17/24
-
30-yd
-
10-yd
-
Run speed (max)
85
INF Velo
2/17/24
-
OF Velo
-
C Velo
-
Pop Time
Positional Tools
2024
Sign in to view rankings 
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.60
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
85.0
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.
12.1
Hitting
2024
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
92.2
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
84.1
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).
210
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
18.7
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.
West Milwaukee Preseason ID
Feb 17, 2024
Trackman - Hitting
92.2
Exit Velocity (max)
84.1
Exit Velocity (avg)
210
Distance (avg)
316
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2024
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
21.1
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.3
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
68.2
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
66.2
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.
West Milwaukee Preseason ID
Feb 17, 2024
Blast - Hitting
21.1
Hand Speed (max)
20.3
Hand Speed (avg)
68.2
Bat Speed (max)
66.2
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2024
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
83.3
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
80.0
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).
2149
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).
70.3
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).
2087
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).
Wisconsin State Games (Invite-Only)
Jul 30, 2024
Trackman - Fastball
83.3
Velocity (max)
78.3 - 81.7
Velo Range
80.0
Eff Velocity (avg)
2,289
Spin Rate (max)
2,149
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
71.5
Velocity (max)
69.5 - 71.2
Velo Range
68.6
Eff Velocity (avg)
2,185
Spin Rate (max)
2,087
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
West Milwaukee Preseason ID
Feb 17, 2024
Trackman - Fastball
82.6
Velocity (max)
81.1 - 82.4
Velo Range
82.6
Eff Velocity (avg)
2,278
Spin Rate (max)
2,218
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
70.2
Velocity (max)
69.1 - 70.0
Velo Range
68.8
Eff Velocity (avg)
2,199
Spin Rate (max)
2,143
Spin Rate (avg)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - ChangeUp
76.2
Velocity (max)
75.0 - 76.0
Velo Range
76.4
Eff Velocity (avg)
1,800
Spin Rate (max)
1,760
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).
83.0
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
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
69.8
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.2
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
79.0
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)
69.0
Game Performance
2024
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.
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.
72.8
Pitch Ai
Notes
News
- Wisconsin State Games: 2025 Right-Handed Pitcher Analysis - Nov 7, 2024
- PBRT Rock Open: Takeaways - Jul 3, 2024
- WIAA Diamond Notes: Week 7 - May 15, 2024
- West Milwaukee Preseason ID: Pitcher Analysis - Apr 29, 2024
- West Milwaukee Preseason ID: Infielder Analysis - Apr 29, 2024
- West Milwaukee Preseason ID: Quick Hits - Feb 21, 2024
Comments
Draft Reports
Contact
Premium Content Area
To unlock contact information, you need to purchase a ScoutPLUS subscription.
Purchase Subscription OR
Login
Physical
2024
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 Profile: RHP/1B
Body: 6-2, 189-pounds.
Delivery: Small rocker into high leg coil, sinks into back leg, rides down mound, simple, easy, repeatable.
Arm Action: RH. Full arc, online, 3/4 slot, loose, clean.
FB: T83, 78-82 mph. Plays straight, flashes ability to get to edges. T2289, 2149 average rpm.
CB: 69-71 mph. Top to bottom breaker, some horizontal movement out of hand, plays with some depth, able to keep low. T2185, 2087 average rpm.
William Grellinger, Marquette (WI), 2025
Positional Profile: 1B/RHP
Body: 6-2, 189-pounds. Long levers, sloped shoulders, more strength and fill coming.
Delivery: Simple and clean delivery, drop and drive, athletic downhill, balanced finish.
Arm Action: RH. Full arm loop, some looseness, 3/4 slot.
FB: T83, 81-82 mph. Natural velocity, some carry, plays low. T2278, 2218 average rpm.
CB: 69-70 mph. 11/5 sharp tilt, comfortable. T2199, 2143 average rpm.
CH: 75-76 mph. Decels, feel for pitch, sinking action. T1800, 1760 average rpm.
ATH: 7.60 runner in the 60. 30.10 max vertical.
William Grellinger, Marquette (WI), 2025
Positional Profile: 1B/RHP
Body: 6-2, 189-pounds. Long levers, sloped shoulders, more strength and fill coming.
Hit: RHH. Simple move to hitting position, on time. Easy operation, drops back shoulder into an uphill path, elevates up the middle of the field, flashed extension out front. 66.2 mph bat speed with 11 G's of rotational acceleration.
Arm: RH. INF-85 mph. Athletic arm action, loose, accurate throws.
Defense: Quality actions, very clean hands, athletic feet around the bag, can turn the 3-6-3.
ATH: 7.60 runner in the 60. 30.10 max vertical.