South Suburban Open: Player Analysis

On Tuesday, June 21, the PBR Illinois staff hosted the South Suburban Open at Ozinga Field in Crestwood, IL. The event featured 18 players from around the state and allowed a number of prospects to pop in front of our staff.

Today we take a look at each and every one of the scouting reports from the event.

One of the biggest winners from Tuesday's event was Vinnie Marvucic (Niles North, 2023). The left-handed hitter led the event in exit velocity, distance and hard-hit % - while also recording the top velocity from the outfield. Standing at a physical 5-foot-11, 185-pounds, Marvucic displayed a knack for the barrel with elevated contact to his pull-side - while also showing barrel control to take the ball up the middle and to the opposite field on a line. With reliable hands in the outfield, an arm that can reach up to 80 mph and his proven ability to hit, Marvucic is a name to know for coaches at the next level. 

Sticking with the offensive winners, Michael Roberson III (Providence Catholic, 2024) was another name that stood out to our scouting staff. The high-waisted, 6-foot, 170-pound, right-handed hitter boasts all sorts of upside, both in his frame and to his game. His long/loose levers at the plate allowed him to create easy bat-speed with extension through the zone, repeating and controlling his limbs well while consistently finding the barrel to put the ball on a line. Though the power numbers might not be off the charts quite yet, it would be no surprise to see Roberson take significant strides as he starts to fill out his wiry and projectable frame. Defensively, Roberson took reps both at first-base and behind the plate, showing well in both spots. His hands work softly at both positions with athletic actions and fluid footwork, also pairing with his strong arm (T82 from INF, T78 from C), not to mention he led the event with a 2.02 pop-time. 

SS/RHP Morgan Kosmos (Tinley Park, 2024) was a standout two-way prospect from Tuesday's event, showing legitimate potential on both sides of the ball. Standing 5-foot-5, 150-pounds, it would be foolish to write Kosmos off for his size because his game easily makes up for it. On the mound, the right-hander ran his fastball up to 83.3 mph with some eye-popping IVB (T34.9) while averaging 20.3 IVB throughout his 'pen. His fastball played with noteworthy horizontal movement, maxing out at 18 inches and averaging 13.4 inches. Kosmos also showed the ability to handle the bat, taking a quality round of BP and putting the ball on a line consistently from the right side with his short/quick swing. 

RHP Jaryd Vence (Hampshire, 2024) stood out on the mound from the event. Standing 5-foot-10, 165-pounds, Vence has room to add on some strength in the coming years to his projectable build. The right-hander's arm plays with a clean arm circle into a 3/4 slot, moving with a fluid pace down the mound repeatedly. His fastball was the hardest in attendance, topping out at 84.4 mph and pairing with a tight 20/4 slider, 67-68 mph. 

ALL POSITION PLAYERS (LISTED ALPHABETICALLY)

Joshua Allen, Marian Catholic (IL), 2026
Positional Profile: 1B
Body: 5-3, 110-pounds.
Hit: LHH. Wide base, crouched setup, toe tap trigger. Some hand waggle pre-pitch, short path to the ball, flat path, oppo/middle approach.
Power: 71.6 max exit velocity, averaged 62.3 mph. 206’ max distance.
Arm: LH. INF - 58 mph. OF - 54 mph. Long out of the glove into a high 3/4 slot.
Defense: OF: Aggressive to the ball, two-hand gather out front. INF: Active feet, two-hand gather.
Run: 8.57 runner in the 60.

Sean Doyle, Andrew (IL), 2025
Positional Profile: INF/OF
Body: 6-0, 180-pounds. Strength in his upper half.
Hit: RHH. Balanced setup. Barrel set high. Hands load back. Direct path to the ball, uphill through the zone with intent to lift, extension through contact.
Power: 84.3 max exit velocity, averaged 67.5 mph. 305’ max distance.
Arm: RH. INF - 69 mph. OF - 69 mph. Long arm swing into a high 3/4 slot.
Defense: OF: Plays through the ball aggressively, two-hand gather at times. INF: Two-hand gather out front.
Run: 8.14 runner in the 60. 

Positional Profile: RHP
Delivery: Controlled pace, tall/fall lower-half, remains in-line with the plate, front foot lands closed.
Arm Action: RH. Long arm swing into a high 3/4 slot.
FB: T71.3, 67.8-71.1 mph. Mostly straight, ASR at times, up in the zone. T1793, 1766 average rpm.
CB: 56.0-57.7 mph. Slight break, 12/6 action. T1662, 1579 average rpm.
SL: 61.0-65.1 mph. Slight 10/4 shape.  T1719, 1637 average rpm.
CH: 60.3-61.9 mph. Plays mostly straight. T1400, 1380 average rpm.

Jaden Franckowiak, Andrew (IL), 2024
Positional Profile: 1B
Body: 6-1, 246-pounds. Large frame.
Hit: RHH. Wide base. Short stride. Hand separation at footstrike, loads hands before moving into an uphill path, some bat-strength, intent to do damage to the pull-side.
Power: 93 max exit velocity, averaged 85.5 mph. 353’ max distance.
Arm: RH. INF - 72 mph. Long/loose arm swing, 3/4 slot.
Defense: Steady hands, two-hand gather out front.
Run: 8.20 runner in the 60. 

William Glenn, Barrington (IL), 2023
Positional Profile: RHP
Body: 6-1, 160-pounds.
Delivery: Controlled tempo, loads into front hip at balance point, slight drop/drive lower-half, remains in-line.
Arm Action: RH. Short, clean arm circle, 3/4 slot.
FB: T81.8, 78.1-80.6 mph. 4-seam: straight, cuts sometimes. 2-seam: ASR T1893, 1827 average rpm.
CB: 67.8-69.0 mph. 11/5 shape.  T1914, 1820 average rpm.
SL: 69.2-71.5 mph. Slight 10/4 shape.  T2008, 1886 average rpm.
CH: 74.0-77.9 mph. Straight to slight ASR. T1914, 1758 average rpm.

Jack Hughes, Evergreen Park (IL), 2024
Positional Profile: 3B
Body: 6-3, 170-pounds. Tall, long-limbed frame, plenty of room to fill out down the road.
Hit: RHH. Upright stance, narrow base, short stride. Short through contact, repeatable through contact, line-drive approach.
Power: 88.2 max exit velocity, averaged 83.4 mph. 323’ max distance.
Arm: RH. INF - 72 mph. Clean path, easy effort from a 3/4 slot.
Defense: Steady hands, two-hand gather out front, body control on slow roller.
Run: 7.44 runner in the 60. 

Morgan Kosmos, Tinley Park (IL), 2024
Positional Profile: SS
Body: 5-5, 150-pounds. Strong, compact frame.
Hit: LHH. Balanced setup, slightly open front foot, short/quick load, toe/tap stride, repeats.  Short/quick hands to the ball, flat path through the zone, pull-side approach, consistently put the ball on a line.
Power: 85.1 max exit velocity, averaged 76.7 mph. 310’ max distance.
Arm: RH. INF - 84 mph. Short out of the glove into a high 3/4 slot, plays with carry and life out of the hand.
Defense: Two-hand gather out front, steady hands.
Run: 7.70 runner in the 60.

Positional Profile: RHP
Delivery: Controlled leg-lift into balance point, repeats with ease, drop/drive lower-half, remains in-line with the plate.
Arm Action: RH. Short, clean arm-circle out of the glove into a high 3/4 slot.
FB: T83.3, 80.2-82.3 mph. Heavy, ASR frequently. T2129, 2023 average rpm.
CB: 61.1-67.3 mph. 11/5 break, 10/4 at times.  T2117, 2059 average rpm.
CH: 69.2-73.2 mph. Downer-action, ASR at times. T1726, 1648 average rpm.

AJ Marchetti, Wheeling (IL), 2023
Positional Profile: C
Body: 6-1, 185-pounds.
Hit: RHH. Upright, open setup. Smooth load into back hip. Coils into contact, some hand separation at foot-strike, long/loose path, uphill through the zone with intent to lift.
Power: 91.3 max exit velocity, averaged 84.5 mph. 352’ max distance.
Arm: RH. C - 74 mph. OF - 79 mph. OF: Short out of the glove, some carry. C: Short out of the glove, high 3/4 slot, ball plays with some carry on a line.
Defense: 2.03-2.14 pop times. OF: Athletic through the ball, fluid feet, reliable hands.C: Steady hands, quick/clean transfer, feet gain ground and work in-line out of the crouch, deadens ball out front on blocks.
Run: 7.30 runner in the 60. 

Vinnie Marvucic, Niles North (IL), 2023
Positional Profile: OF
Body: 5-11, 185-pounds. Strong body, strong upper half.
Hit: LHH. Narrow base. Slightly open, upright stance. Short stride. Short path to the ball, uphill through the zone, extension though contact with bat-speed, ball jumps off the bat, power to the pull-side, line-drive approach up the middle at times and to the opposite field.
Power: 94.9 max exit velocity, averaged 87.3 mph. 359’ max distance.
Arm: LH. OF - 80 mph. Short/clean arm circle, high 3/4 slot.
Defense: Reliable actions, steady hands.
Run: 7.55 runner in the 60. 

Aidan McGovern, Mount Carmel (IL), 2025
Positional Profile: 1B
Body: 5-5, 150-pounds.
Hit: LHH. Tall, slightly open set up. Short stride. Long/uphill path,, loose arms, extension through contact.
Power: 75.3 max exit velocity, averaged 68.3 mph. 265’ max distance.
Arm: LH. INF - 60 mph. Short circle into a 3/4 slot.
Defense: Steady hands, two-hand gather.
Run: 10.26 runner in the 60.

Positional Profile: LHP
Delivery: Smooth tempo throughout, slight drop into back/knee at balance point, moves in-line down the mound, front foot landing closed.
Arm Action: LH. Long out of the glove into a 3/4 slot.
FB: T66.3, 63.7-65.8 mph. Cutting-action. T1608, 1545 average rpm.
CB: 50.2-53.6 mph. 1/7 break.  T1520, 1459 average rpm.
CH: 53.8-54.7 mph. Downer-action at times, slight ASR. T1368, 1229 average rpm.
KN: 53-54 mph. Downward action at times. 

William Merz, Hinsdale Central (IL), 2024
Positional Profile: OF
Body: 6-0, 175-pounds. Long-limbed, high-waisted frame.
Hit: RHH. Open, upright stance, short stride. Level path, extension through contact, put the ball on a line to his pull-side.
Power: 84.8 max exit velocity, averaged 77 mph. 298’ max distance.
Arm: RH. OF - 77 mph. Loose/clean arm from a high 3/4 slot.
Defense: Athletic actions through the ball, sure-handed.
Run: 7.50 runner in the 60. 

Positional Profile: RHP
Delivery: Controlled tempo, repeatable tall/fall delivery, remains in-line to the plate.
Arm Action: RH. Short arm circle, transitions into a high 3/4 to over-the-top slot.
FB: T76.2, 75.2-76.2 mph. 4-seam: heavy, straight to slight ASR. 2-seam: heavy sink and ASR T1831, 1687 average rpm.
CB: 65.8-66.7 mph. 11/5 break, tight spin. T2148, 2125 average rpm.
CH: 67.4-68.8 mph. Downer-action, ASR.  T1599, 1564 average rpm.

Michael O'Connor, Bishop McNamara (IL), 2023
Positional Profile: INF
Body: 6-1, 215-pounds. Strong frame.
Hit: RHH. Open, athletic stance. Smooth stride to even.  Short path to the ball, flat through the zone, looks to put the ball on a line, flashed some jump off the bat.
Power: 87.5 max exit velocity, averaged 80 mph. 274’ max distance.
Arm: RH. INF - 73 mph. Long out of the glove into a 3/4 slot.
Defense: Steady hands, two-hand gather out front.
Run: 8.06 runner in the 60.  

Positional Profile: RHP
Delivery: Controlled tempo into balance point, drop/drive lower-half, remains in-line to the plate.
Arm Action: RH. Long arm swing out of the glove, transitions into a 3/4 slot.
FB: T78.6, 75.7-78.0 mph. Arm-side-run frequently, ability to sink at times. T2010, 1875 average rpm.
CB: 67.4-68.7 mph. Hard, late break, tight, more SL movement.  T2112, 1965 average rpm.
CH: 69.0-70.4 mph. ASR frequently, downer-action, out-pitch potential. T1875, 1821 average rpm.

Nick Randell, Hampshire (IL), 2024
Positional Profile: OF
Body: 5-10, 175-pounds. Athletic frame with proportional strength throughout.
Hit: RHH. Balanced setup. Athletic base. Efficient movements in the box. Separates hands at footstrike, quick through the zone, extension through contact with a flat path, some jump off the bat.
Power: 92.9 max exit velocity, averaged 80.5 mph. 338’ max distance.
Arm: RH. OF - 73 mph. Short arm circle, high 3/4 slot.
Defense: Reliable hands, plays through the ball.
Run: 6.71 runner in the 60. Athletic gait.

Mario Recio, UIC College Prep (IL), 2023
Positional Profile: SS
Body: 5-8, 145-pounds.
Hit: RHH. Open, crouched setup. Athletic stance. Short stride. Short to the ball, loose arms through contact with extension, uses the whole field.
Power: 82.1 max exit velocity, averaged 72.8 mph. 267’ max distance.
Arm: RH. INF - 71 mph. 3/4 slot, plays on the move.
Defense: Fluid feet, soft hands, active pre-pitch, moves well side-to-side.
Run: 7.88 runner in the 60. 

Michael Roberson III, Providence Catholic (IL), 2024
Positional Profile: C
Body: 6-0, 170-pounds. Long-limbed frame with plenty of room for continued physical development.
Hit: RHH. Wide base. High back elbow at load. Big leg lift into short stride. Long/loose levers, bat-speed through the zone with extension after contact, level path, repeats, consistently put the ball on a line.
Power: 87.8 max exit velocity, averaged 75.7 mph. 286’ max distance.
Arm: RH. C - 78 mph. INF - 82 mph. INF: Short out of the glove, 3/4 slot with life, plays from multiple slots and on the move. C: Short to the ear out of the glove, over-the-top slot, strong arm, plays with life out of the hand and carry.
Defense: 2.02-2.14 pop times. INF: Moves well with athletic actions, soft hands, fluid footwork around the bag. C: Sure-handed, quick/clean transfer, athletic feet out of the crouch, moves quickly into blocks, feet work in-line to second, gains ground on throws. 

Jake Stachelski, Thornton Fractional South (IL), 2024
Positional Profile: C
Body: 5-10, 165-pounds. Athletic frame with room to fill out.
Hit: RHH. Athletic base. Pre-loaded back leg. Short stride. Short/direct path to the ball, line-drive approach to the whole field, repeatable stroke.
Power: 82.8 max exit velocity, averaged 75.1 mph. 253’ max distance.
Arm: RH. C - 70 mph. Short to the ear out of the glove, high 3/4 slot, put throws accurately on the bag.
Defense: 2.07-2.14 pop times. Sure-handed, quick/clean transfer, moves well out of the crouch and into blocks, gains ground on throws to second, works in-line.
Run: 7.57 runner in the 60. 

Jake Trezise, Lincoln-Way East (IL), 2025
Positional Profile: OF
Body: 5-10, 155-pounds. Athletic, muscular frame.
Hit: RHH. Tall, open setup. Barrel set vertically. Creates hand separation at footstrike, flat path, line-drive approach, favors pull-side.
Power: 80 max exit velocity, averaged 71.5 mph. 274’ max distance.
Arm: RH. OF - 72 mph. Short out of the glove into a 3/4 slot.
Defense: Athletic actions, soft hands that play through the ball, moves well.
Run: 7.28 runner in the 60. 

Jaryd Vence, Hampshire (IL), 2024
Positional Profile: RHP
Body: 5-10, 165-pounds.
Delivery: Repeatable delivery, works with a fluid tempo, drop/drive lower-half from balance point, remains in-line.
Arm Action: RH. Clean arm circle into a 3/4 slot.
FB: T84.4, 81.7-83.2 mph. ASR, some sink at times. T2127, 2077 average rpm.
SL: 67.3-68.3 mph. Slight break, tight spin, 11/5 shape at times.  T1875, 1791 average rpm.

Robert Zaborowski, Barrington (IL), 2024
Positional Profile: LHP
Body: 5-9, 160-pounds.
Delivery: Stretch only, staggers feet, front foot closer to first-base, drrop/driver lower-half, remains in-line.
Arm Action: LH. Long arm stab out of the glove, moves into a 3/4 slot.
FB: T74.1, 72.7-74.1 mph. Heavy sink. T1977, 1883 average rpm.
SL: 68.7-70.6 mph. Slight break, more cutter action. T2166, 2028 average rpm.
CH: 70.6-71.8 mph. Cuts at times. T1660, 1609 average rpm.

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