83.5
Velocity (max)
2/24/24
CLASS OF 2025
LHP
OF
Zack
Ziroli
Downers Grove North (HS) • IL
6' 1" • 185LBS
R/L • 18yr 2mo
Travel Team: Rhino Baseball (IL) Stavola 2025
6' 1" • 185LBS
R/L • 18yr 2mo
Travel Team: Rhino Baseball (IL) Stavola 2025
Rankings
2025 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
82 - 83
Velo Range
2/24/24
2285
Spin Rate (avg)
8/08/23
Changeup
76 - 78
Velo Range
8/08/23
2013
Spin Rate (avg)
2/24/24
Curveball
66.9 - 68.4
Velo Range
8/08/23
2634
Spin Rate (avg)
8/08/23
90.6
Exit Velocity (max)
7/11/23
82.8
Exit Velocity (avg)
7/11/23
338
Distance (max)
7/11/23
78
Sweet Spot %
7/11/23
20.9
Hand Speed (max)
7/11/23
69.6
Bat Speed (max)
7/11/23
15.3
Rot. Acc (max)
7/11/23
11
Hard Hit %
7/11/23
7.29
60
7/11/23
4.01
30-yd
7/11/23
1.72
10-yd
7/11/23
18.7
Run speed (max)
7/11/23
-
INF Velo
84
OF Velo
7/11/23
-
C Velo
-
Pop Time
Positional Tools
2023
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60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.29
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
84.0
Power / Speed Score
A simple calculation that divides the athlete’s Exit Velocity Max by the athlete’s 60 Yard Dash time for the given event year. For example, 98 MPH / 7.00s = 14.00.
12.4
Hitting
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
90.6
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
82.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
338
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
251
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
22.6
Hard Hit %
Percentage of batted balls with exit velocities over 95 MPH in the given event year.
Sweet Spot %
Percentage of batted balls in the given event year with a launch angle between 8° and 32°.
Line Drive %
Percentage of batted balls with launch angles between 10 and 25 degrees in the given event year.
Fly Ball %
Percentage of batted balls with launch angles between 25 and 50 degrees in the given event year.
Ground Ball %
Percentage of batted balls with launch angles below 10 degrees in the given event year.
Northwest Suburban Open
Jul 11, 2023
Trackman - Hitting
90.6
Exit Velocity (max)
82.8
Exit Velocity (avg)
251
Distance (avg)
338
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Hitting
2023
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
20.9
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.0
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
69.6
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
68.1
Rotational Acceleration Max
The highest Rotational Acceleration of any swing in the given event year.
Rotational Acceleration Avg
The average Rotational Acceleration for all swings in the given event year.
On-Plane Efficiency Max
The highest On-Plane Efficiency of any swing in the given event year.
On-Plane Efficiency Avg
The average On-Plane Efficiency for all swings in the given event year.
Northwest Suburban Open
Jul 11, 2023
Blast - Hitting
20.9
Hand Speed (max)
20.0
Hand Speed (avg)
69.6
Bat Speed (max)
68.1
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
83.5
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
82.3
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).
2156
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.
26.2
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).
66.6
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).
2477
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).
77.1
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).
2013
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).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.4
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
81.3
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).
2273
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.
27.9
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).
67.2
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).
2583
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).
76.1
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).
1916
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).
Preseason All-State: Upperclass (Invite-Only)
Feb 24, 2024
Trackman - Fastball
83.5
Velocity (max)
81.9 - 82.9
Velo Range
80.1
Eff Velocity (avg)
2,180
Spin Rate (max)
2,156
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
67.3
Velocity (max)
65.8 - 67.3
Velo Range
64.2
Eff Velocity (avg)
2,524
Spin Rate (max)
2,477
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
77.7
Velocity (max)
76.6 - 77.7
Velo Range
75.5
Eff Velocity (avg)
2,090
Spin Rate (max)
2,013
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Illinois State Games (Invite-Only)
Aug 8, 2023
Trackman - Fastball
82.4
Velocity (max)
80.9 - 82.4
Velo Range
80.1
Eff Velocity (avg)
2,455
Spin Rate (max)
2,285
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
68.6
Velocity (max)
66.9 - 68.4
Velo Range
65.7
Eff Velocity (avg)
2,715
Spin Rate (max)
2,634
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
78.1
Velocity (max)
75.8 - 77.8
Velo Range
75.7
Eff Velocity (avg)
1,971
Spin Rate (max)
1,917
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Northwest Suburban Open
Jul 11, 2023
Trackman - Fastball
82.3
Velocity (max)
79.3 - 81.5
Velo Range
78.6
Eff Velocity (avg)
2,287
Spin Rate (max)
2,240
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
68.0
Velocity (max)
65.4 - 67.4
Velo Range
63.2
Eff Velocity (avg)
2,545
Spin Rate (max)
2,501
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
76.4
Velocity (max)
74.8 - 76.3
Velo Range
74.5
Eff Velocity (avg)
2,010
Spin Rate (max)
1,915
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Pitch Scores
2024
2023
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
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
Fastball
Hop+
A fastball with hop has a flat approach angle and visually jumps through the zone. When thrown up in the zone, it is more likely to generate a higher swing and miss average. Hop+ of 100 is MLB average.
Fastball
Sink+
A fastball with sink has low backspin and drops through the strike zone. When thrown down in the zone, it is more likely to generate a higher ground ball percentage and lower launch angle. Sink+ of 100 is MLB average.
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
Curveball
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Curveball
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ of 100 is MLB average.
Pitching Velos
2024
2023
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)
82.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
77.5
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
82.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
80.8
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.8
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.2
Game Performance
2023
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.72
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.01
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.29
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Visual Edge
Pitch Ai
Notes
News
- Illinois State Games: 2025 Pitcher Analysis - Oct 26, 2023
- PBRT Illinois Fall Open: Takeaways - Oct 6, 2023
- Northwest Suburban Open: Pitcher Analysis - Sep 25, 2023
- Northwest Suburban Open: Positional Analysis - Sep 13, 2023
- Illinois State Games, Takeaways: 2025s - Aug 21, 2023
- Northwest Suburban Open: Takeaways - Jul 20, 2023
Comments
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LHP Zack Ziroli (Downers Grove North, 2025) impressed throughout our brief look. Upside frame, listed at 6-foot-1, 175-pounds with room for added strength. The southpaw worked his fastball up to 82 mph, playing with heavy run/sink at times. He paired the fastball off a big-breaking curveball in the mid-60s, landing it for strikes and even back-dooring some hitters with it.
LHP Zack Ziroli (Downers Grove North, 2025) is an uncommitted two-way that provided more than enough for his team this weekend on the mound. Working out the stretch, the 6-foot-1 southpaw demonstrated strong poise and attention to detail throughout clean and difficult innings. Mixing between a 81-82 mph fastball and a 66-67 mph sweeper, Ziroli was able to keep the hitters off-balance and created swing and miss.
LHP Zack Ziroli (Downers Grove North, 2025) was recently a winner at the Northwest Suburban Open this summer, and gave another intriguing look at the Illinois State Games. Ziroli is an athletic 6-foot, 175-pound southpaw that moves well around the mound with an easy, fluid arm action. His fastball primarily worked in the low-80s with carry up in the zone (T2455 RPM), and he spun a tight curveball in the high-60s with late bite to get swings and misses around the zone (T2715 RPM).
Positional Profile: LHP/OF
Body: 6-0, 170-pounds.
Delivery: Controlled tempo, high leg lift, slight pre-set bend in the back knee, works in-line down the mound.
Arm Action: LH. Long, loose arm action. Lower 3/4 slot.
FB: T82, 81-82 mph. Run. Ability to spot up. T2455, 2285 average rpm.
CB: 67-68 mph. Sharp 1/7 action with occasional depth. T2715, 2634 average rpm.
CH: 76-78 mph. Thrown low in the zone with fade. T1971, 1917 average rpm.
At 6-foot-1, 170-pounds LHP/OF Zach Ziroli (Downers Grove North, 2025) was a two-way winner from this event. Offensively, Ziroli flashed bat strength at the plate from an uphill right-handed swing that worked gap-to-gap as a result. He played with bounce and an intentful first step from the outfield, flowing freely throughout his defense workout. Ziroli showed a loose arm that peaked at 84 mph on his best bullet and hopped on the mound later on, pitching in the low-80s with his fastball while mixing in a mid-60s curveball, too.
At 6-foot-1, 170-pounds LHP/OF Zach Ziroli (Downers Grove North, 2025) was a two-way winner from this event. Offensively, Ziroli flashed bat strength at the plate from an uphill right-handed swing that worked gap-to-gap as a result. He played with bounce and an intentful first step from the outfield, flowing freely throughout his defense workout. Ziroli showed a loose arm that peaked at 84 mph on his best bullet and hopped on the mound later on, pitching in the low-80s with his fastball while mixing in a mid-60s curveball, too.
Positional Profile: LHP/OF
Body: 6-0, 170-pounds.
Hit: RHH. Crouched setup, open stance, small leg lift, short stride. Athletic swing, stays on-plane, controlled intent, present bat speed and hard up-the-middle contact. 68.1 mph bat speed with 13 G’s of rotational acceleration.
Power: 91 max exit velocity, averaged 82.8 mph. 338’ max distance.
Arm: LH. OF - 84 mph. Short, quick arm, 3/4 slot.
Defense: Athletic actions, proper routes, attacks with purpose, works in-stride, clean and directional release.
Run: 7.29 runner in the 60.