@kosempadamian 87
Velocity (max)
2/23/25
CLASS OF 2026
RHP
Damian
Kosempa
Marquette University (HS) • WI
6' 0" • 192.5LBS
R/R • 17yr 4mo
Travel Team: PTA cardinal 16u
6' 0" • 192.5LBSR/R • 17yr 4mo
Travel Team: PTA cardinal 16u
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
85 - 87
Velo Range
2/23/25
2296
Spin Rate (avg)
7/30/24
Changeup
77.9 - 80.4
Velo Range
2/23/25
1636
Spin Rate (avg)
3/03/24
Curveball
70 - 76
Velo Range
6/20/24
2376
Spin Rate (avg)
2/23/25
Slider
80 - 82
Velo Range
7/04/25
2606
Spin Rate (avg)
2/23/25
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).
87.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
86.1
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).
2210
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).
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
73.6
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).
2376
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).
79.2
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).
1146
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).
77.8
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).
2606
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).
84.7
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
83.6
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).
2232
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.
26.7
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).
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
71.8
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).
2158
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).
76.0
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).
1636
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).
76.1
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).
2458
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).
West Milwaukee Preseason ID
Feb 23, 2025
Trackman - Fastball
87.0
Velocity (max)
85.3 - 86.8
Velo Range
85.6
Eff Velocity (avg)
2,321
Spin Rate (max)
2,210
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
74.3
Velocity (max)
73.0 - 74.2
Velo Range
72.4
Eff Velocity (avg)
2,443
Spin Rate (max)
2,376
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
79.4
Velocity (max)
76.4 - 79.1
Velo Range
76.9
Eff Velocity (avg)
2,685
Spin Rate (max)
2,606
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
81.2
Velocity (max)
77.9 - 80.4
Velo Range
78.8
Eff Velocity (avg)
1,195
Spin Rate (max)
1,146
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Wisconsin State Games (Invite-Only)
Jul 30, 2024
Trackman - Fastball
84.7
Velocity (max)
83.4 - 84.5
Velo Range
81.6
Eff Velocity (avg)
2,355
Spin Rate (max)
2,296
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
77.7
Velocity (max)
76.3 - 77.5
Velo Range
73.8
Eff Velocity (avg)
2,632
Spin Rate (max)
2,530
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
South Milwaukee Preseason ID
Mar 3, 2024
Trackman - Fastball
83.8
Velocity (max)
82.5 - 83.6
Velo Range
81.4
Eff Velocity (avg)
2,188
Spin Rate (max)
2,135
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
73.0
Velocity (max)
70.9 - 72.7
Velo Range
69.1
Eff Velocity (avg)
2,229
Spin Rate (max)
2,158
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
76.1
Velocity (max)
73.5 - 75.5
Velo Range
71.7
Eff Velocity (avg)
2,449
Spin Rate (max)
2,313
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
77.1
Velocity (max)
75.1 - 77.0
Velo Range
75.2
Eff Velocity (avg)
1,758
Spin Rate (max)
1,636
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
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
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.
Pitching Velos
2025
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
87.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
85.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
79.0
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
79.2
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)
83.0
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
72.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.0
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.8
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)
79.3
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.0
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
- West Milwaukee Preseason ID: Pitcher Analysis - Apr 2, 2025
- West Milwaukee Preseason ID: Positional Data Dive - Feb 27, 2025
- West Milwaukee Preseason ID: Pitcher Data Dive - Feb 27, 2025
- West Milwaukee Preseason ID: 2025/2026 Quick Hits - Feb 26, 2025
- West Milwaukee Preseason ID: Statistical Analysis - Feb 25, 2025
- Q&A With Notre Dame Commit Montgomery O'Brien - Feb 6, 2025
- Prep Baseball Wisconsin Best of 2024: Top Average Slider Spin Rate - Dec 2, 2024
- Prep Baseball Wisconsin Best of 2024: Top Average Fastball Spin Rate - Nov 28, 2024
- Wisconsin State Games: 2026/2027 Right-Handed Pitcher Analysis - Nov 7, 2024
- South Milwaukee Preseason ID: Quick Hits - Mar 6, 2024
- The Rock Summer Championships 15U: Takeaways - Jun 21, 2023
Comments
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Positional Profile: RHP
Body: 6-0, 193-pounds. Strong, proportional frame.
Delivery: Side steps to coiled balance point, hip turn; works on line to target with some effort throughout.
Arm Action: RH. Arm strength; long to a 3/4 release.
FB: T87, 85-87 mph. Running action, some feel for the zone. T2321, 2210 average rpm.
CB: 73-74 mph. Depth, some feel to locate and manipulate spin; 10/4 shape. T2443, 2376 average rpm.
SL: 76-79 mph. Short action with more of a horizontal profile. T2685, 2606 average rpm.
CH: 78-80 mph. Slight deceleration with locate at the bottom of the zone; straight. T1195, 1146 average rpm.
ATH: 25.50 max vertical.
Damian Kosempa, MARQUETTE UNIVERSITY HIGH SCHOOL (WI), 2026
Positional Profile: RHP
Body: 6-1, 190-pounds.
Delivery: Methodical, high leg lift with coil, tall/fall down the mound, athletic, repeats it.
Arm Action: RH. Full arm action, 3/4 slot, quick arm.
FB: T85, 83-84 mph. Plays with arm-side run. T2355, 2296 average rpm.
SL: 76-77 mph. 11/5 shape, showed confidence to throw for strikes to both sides of plate, can really spin it, out-pitch weapon. T2632, 2530 average rpm.
Damian Kosempa, Marquette University (WI), 2026
Positional Profile: RHP
Body: 6-0, 175-pounds. Athletic build with good proportions and room to add to athletic frame.
Delivery: Controlled and deliberate leg lift, medium balance point, drop/drive lower-half, works in-line.
Arm Action: RH. Long arm out of the glove, 3/4 release.
FB: T84, 83-84 mph. Life out of the hand with some late running action. T2188, 2135 average rpm.
CB: 71-73 mph. Sharp, downer action, landed for strikes and beneath the zone. T2229, 2158 average rpm.
SL: 74-76 mph. Backed up on him at times, flashed sharp 10/4 action with late horizontal break. T2449, 2313 average rpm.
CH: 75-77 mph. Thrown with arm-speed, clean out of the hand with fading action, some feel around the bottom of the zone, rounds out 4 pitch mix starting pitcher repertoire. T1758, 1636 average rpm.
Listed at 6-foot, 175-pounds, the right-hander cruised with his fastball in the 82-84 mph range, playing with carry and running action to his arm-side. He showed both a curveball and a slider, with the slider appearing to be his stronger offering with over 2,400 rpm at times, playing with sharp lateral break at 73-75 mph. He also displayed a changeup at 75-77 mph, running over 16” at times.
Kosempa gave an intriguing look on the mound on Thursday. Standing at a strong 6-foot, 175-pound frame, Kosempa presented above-average arm talent during his start. The fastball sat 79-82 T83 mph. Also showed a curveball in the low-70s that had sharp movement and flashed swing-and-miss potential. Kosempa is a raw mover on the mound that will be interesting to watch as he grows into his body. Final line: CG, 1ER, 1H, 9Ks.
Started at shortstop on Sunday, tallying a hard-hit double in two at-bats on the day. Has a strong swing that produces easy power. On the mound, he pitched 1.2 innings in relief with two strikeouts as well. Fastball topped at 81 mph, sitting 77-80 mph and flashed a hard breaking ball up to 75 mph. Has a quick arm on the mound with simple mechanics. Strong body with a thick lower half.
Kosempa dominated on the bump this afternoon. The RHP induced swing and miss all game with his two-pitch mix. The sidesaddle delivery is calm and works tall and fall. The arm works quick and out of a ¾ slot. Fastball sat 77-81 mph with ride through the zone. The breaking ball was sharp with slurve action, sitting 71-74 mph. Also flashed a change at 74 mph. Final line: CG, SHO, 5 IP, 3 H, 8 K.