Prep Baseball Report

CLASS OF 2026

RHP

Damian
Kosempa

Marquette (HS) • WI
6' 1" • 190LBS
R/R • 16yr 7mo
Travel Team: PTA cardinal 16u

Rankings

2026 National

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2026 State

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Best of Snapshot
TrackMan Pitching
Pitch Scores
Pitching Velos
News
Comments
Contact

Best Of Stats

Pitching

Fastball

85
Velocity (max)
7/30/24
83.4 - 84.5
Velo Range
7/30/24
2296
Spin Rate (avg)
7/30/24

Changeup

75 - 77
Velo Range
3/03/24
1636
Spin Rate (avg)
3/03/24

Curveball

70 - 76
Velo Range
6/20/24
2158
Spin Rate (avg)
3/03/24

Slider

76.3 - 77.5
Velo Range
7/30/24
2530
Spin Rate (avg)
7/30/24

Positional Tools

Hitting

Hitting

Pitching

2024
Fastball
Velocity Max
84.7
Fastball
Velocity Avg
83.6
Fastball
Spin Rate Avg
2232
Fastball
Spin Score Avg
26.7
Fastball
Total Movement Avg
Curveball
Velocity Avg
71.8
Curveball
Spin Rate Avg
2158
Curveball
Total Movement Avg
Changeup
Velocity Avg
76.0
Changeup
Spin Rate Avg
1636
Changeup
Total Movement Avg
Slider
Velocity Avg
76.1
Slider
Spin Rate Avg
2458
Slider
Total Movement 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+
Slider
Hammer+
Slider
Sweep+
Wisconsin State Games (Invite-Only)
Jul 30, 2024
Pitch Scores - Fastball
Rise+
Pitch Scores - Slider
Hammer+
Sweep+

Pitching Velos

2024
2023
Fastball
Velocity Max
85.0
Fastball
Velocity Avg
83.0
Curveball
Velocity Avg
72.5
Changeup
Velocity Avg
76.0
Slider
Velocity Avg
75.8
Fastball
Velocity Max
83.0
Fastball
Velocity Avg
78.5
Changeup
Velocity Avg
72.0
Wisconsin State Games (Invite-Only)
Jul 30, 2024
Pitching
85
Max FB
83 - 84
FB
76 - 77
SL
16U National Championship
Jun 20, 2024
Pitching
84
Max FB
80 - 84
FB
70 - 76
CB
South Milwaukee Preseason ID
Mar 3, 2024
Pitching
84
Max FB
83 - 84
FB
71 - 73
CB
75 - 77
CH
74 - 76
SL
15U National Championship
Jul 6, 2023
Pitching
83
Max FB
77 - 80
FB
70 - 74
CH
PBRT Wisconsin Open
Jun 29, 2023
Pitching
83
Max FB
79 - 82
FB
72 - 75
CB
The Rock Summer Championships
Jun 15, 2023
Pitching
81
Max FB
77 - 81
FB
71 - 74
CB
74 - 74
CH

Game Performance

Visual Edge

Pitch Ai

Notes

Comments

7/30/24
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.
3/03/24
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.
3/03/24
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.
6/29/23

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.

6/18/23

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.

6/15/23

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.

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