Damian
Kosempa

Kosempa pitched six innings against Brookfield Central, allowing no runs and zero hits. He issued four walks and struck out 15 batters.

Uncommitted. Currently ranked No. 16 in the state’s senior class, was also a recent winner at the inaugural Wisconsin Preseason Procase. Standing at a trim 6-foot-1, 196-pound frame. Got the start on the mound for Marquette tossing six innings, striking out 15 batters allowing one unearned run and walking four. Advanced three pitch mix, earning swing and miss on all three offerings throughout the outing. The fastball sat 89-92 mph early with life out of the hand, the slider projects as the best pitch moving forward thrown hard at 79-82 mph with sharp action. Will throw the breaking ball in any count, high-usage pitch and leans on it heavily. Flashed feel for a diving changeup at 80-82 mph with upside against both handed batters. Some of the top stuff in the class with a pair of advanced secondaries that project as potential putaway pitches at the next level.

RHP Damian Kosempa (Marquette University, 2026): Maryville recruit, Tossed perhaps the loudest and most impressive ‘pen of the event, standing at an athletic 6-foot-1, 193.6-pound frame with lean strength throughout. On the mound, the right-hander showed a ticked up fastball sitting 90-92 mph (2,485.0 rpm) with 15.2 inches of average induced vertical break, while his slider played at 83-84 mph (2,978 rpm) with -13.4 inches of horizontal movement. Notably, both of those average spin metrics explicitly led the event, producing a heavy, jumping heater and a late-breaking, two-plane breaking ball that serves as a potentially primary out-pitch weapon. He rounds out a premium arsenal with an 83-84 mph changeup that kills spin to 945 rpm, flashing 9.2 inches of horizontal movement and late depth at -3.4 inches of induced vertical break to tunnel beautifully off his primary mix. Always shown a knack for spin, now with improved velo and another secondary that profiles well against both-handed batters the senior put himself on the radar as a pro-follow is not this spring then throughout his collegiate career.

Positional Profile: RHP Body: 6-1, 192.5-pounds. Athletic frame with lean strength throughout the frame.
Delivery: Medium tempo, online tuck, lands with slight closed direction to home, low leg swing finish with direction to home, repeats it, super athletic.
Arm Action: RH. Full arc, whippy, 3/4 slot, quick, repeats it.
FB: T92, 90-92 mph. Feel for strikes, heavy, jumps out of his hand, has forward life finish. T2612, 2485 average rpm.
SL: 83-84 mph. Out pitch weapon, late breaking two plane, quick breaker, feel for zone and ability to get below for chase, out pitch weapon. T3137, 2978 average rpm.
CH: 83-84 mph. Good tunnel out of the hand, depth and fade, late, out pitch weapon, plays like a left handed slider. T1050, 945 average rpm.

Uncommitted, currently ranked No. 64 in Wisconsin’s 2026 class. Standing in at 6-foot, 192-pounds, Kosempa had a solid performance on the mound during Friday morning's win. The right-hander was very balanced on the mound and worked the zone well against hitters, bringing good delivery making it hard for hitters to hit off of him. Kosempa showed a heavy fast ball at 83-85 mph, topping 86 mph in the first couple of innings. He also utilized a slider at 76-78 mph, topping 79 mph.

+ RHP Damian Kosempa (Marquette, 2026) had a very nice day on the mound. The physical right-hander was up to 87 mph with the heater that showed late and hard boring action to the arm side of the plate. Kosempa’s calling card is his ability to spin the baseball. He deployed a couple of different breaking balls. The curve showed big and late depth with 10/4 type shape while the slider (2700 RPMs) has more horizontal type break. Both profile as pitches he can land for strikes and ones he can get below for chase. The change-up is his 4th best but a useful offering with arm side type fade in the hitting zone. Kosempa is an arm we continue to like and he did not disappoint with his showing on the mound on Sunday.

Damian Kosempa, Marquette University (WI), 2026
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.