@TheoKellogg2327 89.2
Velocity (max)
6/10/25
CLASS OF 2026
RHP
OF
Theo
Kellogg
Libertyville (HS) • IL
5' 11" • 215.8LBS
R/R • 17yr 5mo
Travel Team: Prime Athletics 17u
5' 11" • 215.8LBSR/R • 17yr 5mo
Travel Team: Prime Athletics 17u
Rankings
2026 National
Rankings available to Premium Subscriber
2026 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
88.4 - 89.1
Velo Range
6/10/25
2278
Spin Rate (avg)
6/10/25
Changeup
72.3 - 76.2
Velo Range
6/03/24
1606
Spin Rate (avg)
6/03/24
Slider
73.1 - 74.4
Velo Range
6/10/25
2360
Spin Rate (avg)
6/10/25
Positional Tools
Hitting
Hitting
Pitching
2025
2024
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Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
89.2
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
88.8
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).
2278
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.
25.7
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
73.8
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).
2360
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).
Splitter
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
74.2
Splitter
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).
1002
Splitter
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).
85.5
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
84.7
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).
2249
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
74.2
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).
1606
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).
69.3
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).
1992
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).
Chicagoland Summer ID
Jun 10, 2025
Trackman - Fastball
89.2
Velocity (max)
88.4 - 89.1
Velo Range
89.6
Eff Velocity (avg)
2,330
Spin Rate (max)
2,278
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
74.5
Velocity (max)
73.1 - 74.4
Velo Range
73.4
Eff Velocity (avg)
2,394
Spin Rate (max)
2,360
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Splitter
76.3
Velocity (max)
72.4 - 76.1
Velo Range
74.4
Eff Velocity (avg)
822
Spin Rate (max)
1,002
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Slammers Scout Day
Jun 3, 2024
Trackman - Fastball
85.5
Velocity (max)
84.1 - 85.3
Velo Range
80.5
Eff Velocity (avg)
2,294
Spin Rate (max)
2,249
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
71.1
Velocity (max)
68.5 - 70.3
Velo Range
64.8
Eff Velocity (avg)
2,086
Spin Rate (max)
1,992
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
76.3
Velocity (max)
72.3 - 76.2
Velo Range
70.3
Eff Velocity (avg)
1,765
Spin Rate (max)
1,606
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
2025
2024
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
89.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
87.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.2
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
85.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
84.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.0
Slider
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
2025
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.
Vizual Edge
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
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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.
RHP Theo Kellogg (Libertyville, 2026) came away from the event as a big winner. Comes in with a strong 5-foot-11, 216-pound frame. Kellogg was the leader in max velocity at 89.2 mph with a 2278 average spin rate on his fastball and a max IVB of 17.1 inches. He also showed a slider that sat 73-74 mph with an average spin rate of 2359. He kills the spin on his splitter as the average spin rate comes in at 1002 and sits 72-76 with a spin efficiency of 82%.
RHP Theo Kellogg (Libertyville, 2026) was another Libertyville product that showed well on the mound. Kellogg threw one of the event's hardest fastballs at 85.5 mph (avg. 2249 rpm), while showing carry (avg. 17.2" IVB) and arm-side run (15.4" HM). His changeup also played with arm-side action (avg. 17.4" HM) at 72-76 mph with sink (avg. 6.1" IVB) at the bottom of the zone. Kellogg would round out his mix with a 68-71 mph slider that flashed sharp action.