Tyson
Grulkowski

Showed some electric stuff this morning on the mound. Striking out three through one plus innings. FB: 86-89 mph, SL: 74-77. The South Florida commit and number two ranked pitcher in the state attacks hitters with a low ¾ arm slot.

+ RHP/1B Tyson Grulkowski (Muskego, 2026) is one of the top uncommitted arms in the region, and his performance Sunday was one of the best on a loaded roster. His physicality immediately stands out, as a 6-foot-5, 227-pound prospect who moves very fluidly on the mound, a clean, fast arm that delivers the ball from a 5.2-foot release height on average, extending down the mound at over 7 feet. His low ¾ arm slot really complements his entire arsenal, a fastball, sinker, sweeper, and change. The fastball, 87-89 mph, spins at roughly 2,300 rpm that had late life and run. The sinker, however, really stands out given his arm slot, at 87-88 mph with 17.3 inches of arm-side movement that he landed in the zone more often. The sweeping slider, 75-77 mph, led the event in average spin rate (2,768 rpm) with 14 inches of glove-side action (0.5-inch IVB avg.). His changeup, 80-82 mph, is deceptive with arm-side fade and run too. Grulkowski is also a middle-of-the-order type of hitter, with a max exit speed of 102.0 mph and over 78.1 mph bat speed on average. It’s easy to envision another climb in velocity in the near future, which would only enhance a special profile.

Tyson Grulkowski, Muskego (WI), 2026
Positional Profile: RHP/1B
Body: 6-5, 228-pounds. Strong build, XL frame with athleticism and good proportions, more fill coming.
Delivery: Hybrid, rocker step, high leg kick.
Arm Action: RH. Loose and fluid, low 3/4 slot with whip.
FB: T89, 88-89 mph. 4S: Life out of the hand, feel for the zone. 2S: flashed running action with sink. T2403, 2289 average rpm.
SL: 75-77 mph. Sharp sweeping action, big, potential out pitch. T2861, 2769 average rpm.
CH: 81-82 mph. Thrown out of the same window, similar shape to the fastball. T2035, 1902 average rpm.
ATH: 7.40 runner in the 60. 1.73 and 4.04 in the 10 and 30 yard splits. 24.30 max vertical.

Tyson Grulkowski, Muskego (WI), 2026
Positional Profile: RHP/1B
Body: 6-5, 228-pounds. Strong build, XL frame with athleticism and good proportions, more fill coming.
Hit: RHH. Wider base set up, loose and fluid to hitting position. Downhill with leverage, hammers the ball to all fields, backspin, loud contact, has control of barrel. 78.1 mph bat speed with 12 G's of rotational acceleration.
Power: 102 max exit velocity, averaged 90.7 mph. 375' max distance.
Arm: RH.
ATH: 7.40 runner in the 60. 1.73 and 4.04 in the 10 and 30 yard splits. 24.30 max vertical.
Vizual Edge: 76.23 Edge Score

Tyson Grulkowski, Muskego (WI), 2026
Positional Profile: RHP/3B
Body: 6-5, 212-pounds. Long levers, good proportions, more fill coming.
Delivery: Controlled leg lift, clean and easy delivery, athletic downhill.
Arm Action: RH. Loose arm action with whip out front, lower 3/4 slot.
FB: T86, 85-86 mph. Very natural, some carry and arm side run, strikes. T2360, 2241 average rpm.
SL: 77-78 mph. Sharp 11/5 tilt, tight through the zone. T2705, 2672 average rpm.
CH: 80-81 mph. Comfortable, decel, sinking action. T2087, 1818 average rpm.
ATH: 7.69 runner in the 60. 26.60 max vertical.

Tyson Grulkowski, Muskego (WI), 2026
Positional Profile: RHP/3B
Body: 6-5, 212-pounds. Long levers, good proportions, more fill coming.
Hit: RHH. Narrow set up, quiet early toe tap back, short and quiet hand trigger. Quick, strong hands, uphill path, intent to lift, whippy through the zone with a heavy barrel, pull-side approach 75.2 mph bat speed with 10 G's of rotational acceleration.
Power: 101 max exit velocity, averaged 95.1 mph. 379' max distance.
Arm: RH. INF-87 mph. Loose, athletic arm action, easy throws across the diamond with accuracy. Plays from multiple slots and on the move.
Defense: Two hand gather under midline, has some first step bounce and quickness.
ATH: 7.69 runner in the 60. 26.60 max vertical.

RHP/3B Tyson Grulkowski (Muskego, 2026) is a 6-foot-5 two-way player with upside on both sides of the ball. On the mound, despite his lanky levers, he is an ultra-clean mover, pairing it with a loose and quick arm. His fastball was up to 86.4 mph with carry and run, showing natural feel to go in and out with it. His hard slider had sharp 11/5 tilt with tight break through the zone, at 77-78 mph and also nearly 2,700 RPMs on average. He rounded out his repertoire with a deceptive changeup in the low-80s that featured big running action, roughly 18” on average, and depth. Offensively, Grulkowski put on a show during his BP round, as he led all in attendance with a 100.8 mph max exit velocity, while also averaging 95.1 mph. Grulkowski showed quick movements with the bat with strong hands and an uphill, pull-heavy approach. It’s a whippy barrel through the zone with a narrow set-up and quiet, early toe-tap. Defensively he showed a quick first step with athletic arm action. His 87 mph throw across the diamond was among Saturday’s leaders, too.

RHP/3B Tyson Grulkowski (Muskego, 2026) may have been one of the day’s biggest winners, regardless of class. Grulkowski stands a long, wiry, and projectable 6-foot-3, 190 pounds, and his athleticism produces a well-sequenced swing that produces easy bat speed that allows him to leverage balls to all fields efficiently. Additionally, Grulkowski is an impressive defender on the infield, where his athleticism blends in well and his footwork and arm strength (84 mph max) project to develop seamlessly into a third base profile. He was just as promising from the mound, too, where he reached an 83.2 mph high, which led all freshmen, and he spins it at a high rate that raises his ceiling even higher. The spin translates to the curve and slider, which both feature high spin rates and not just for his age, and the changeup is a promising point of development to watch as well. His performance in Waukesha allowed him to burst onto the scene as an instant follow member of the state’s 2026 class.

RHP/3B Tyson Grulkowski (Muskego, 2026) may have been one of the day’s biggest winners, regardless of class. Grulkowski stands a long, wiry, and projectable 6-foot-3, 190 pounds, and his athleticism produces a well-sequenced swing that produces easy bat speed that allows him to leverage balls to all fields efficiently. Additionally, Grulkowski is an impressive defender on the infield, where his athleticism blends in well and his footwork and arm strength (84 mph max) project to develop seamlessly into a third base profile. He was just as promising from the mound, too, where he reached an 83.2 mph high, which led all freshmen, and he spins it at a high rate that raises his ceiling even higher. The spin translates to the curve and slider, which both feature high spin rates and not just for his age, and the changeup is a promising point of development to watch as well. His performance in Waukesha allowed him to burst onto the scene as an instant follow member of the state’s 2026 class. 

Positional Profile: RHP
Body: 6-3, 190-pounds. Long levers, present strength with more strength and fill coming.
Delivery: Coiled leg lift, tall and fall delivery, works in-line.
Arm Action: RH. Loose live arm, 3/4 slot.
FB: T83, 81-82 mph. Plays with run to arm side. Adds a sinker with downer action and arm speed. T2363, 2181 average rpm.
CB: 67-68 mph. Slurve type breaking ball. T2460, 2329 average rpm.
SL: 72-74 mph. Tight sweeping slider with plus spin for age. Best secondary pitch. T2738, 2620 average rpm.
CH: 75-76 mph. Flashed fade action with sink, showed upside. T1802, 1717 average rpm.

Positional Profile: RHP/3B
Body: 6-3, 190-pounds. Long levers, present strength with more strength and fill coming.
Delivery: Coiled leg lift, tall and fall delivery, works in-line.
Arm Action: RH. Loose live arm, 3/4 slot.
FB: T83, 81-82 mph. Plays with run to arm side. Adds a sinker with downer action and arm speed. T2363, 2181 average rpm.
CB: 67-68 mph. Slurve type breaking ball. T2460, 2329 average rpm.
SL: 72-74 mph. Tight sweeping slider with plus spin for age. Best secondary pitch. T2738, 2620 average rpm.
CH: 75-76 mph. Flashed fade action with sink, showed upside. T1802, 1717 average rpm.

Positional Profile: 3B
Hit: RHH. Stock set up, relaxed hands. Natural smooth easy advance to centered loaded hitting position, inside of back heel pressure into ground, quick hands to and through the ball, serious leverage to impact the ball to all fields.
Power: 93 max exit velocity, averaged 87.3 MPH. 320' max distance.
Arm: RH. INF-84 mph.Low 3/4 slot, quick arm, accurate.
Defense: Smooth feet, soft hands, can defend.
Run: 7.88 runner in the 60.
Vizual Edge: 79.82 Edge Score

Positional Profile: RHP/3B
Body: 6-3, 190-pounds. Long levers, present strength with more strength and fill coming.
Hits: RHH. Stock set up, relaxed hands. Natural smooth easy advance to centered loaded hitting position, inside of back heel pressure into ground, quick hands to and through the ball, serious leverage to impact the ball to all fields.
Power: 93 max exit velocity, averaged 87.3 MPH. 320' max distance.
Arm: RH. INF-84 mph.Low 3/4 slot, quick arm, accurate.
Defense: Smooth feet, soft hands, can defend.
Run: 7.88 runner in the 60.
Vizual Edge: 79.82 Edge Score