CLASS OF 2024
RHP
C
Jonah
Roloff
Madison JC
Kettle Moraine (HS) • WI
5' 11" • 165LBS
L/R • 18yr 11mo
Travel Team: Prospects Training Academy
Kettle Moraine (HS) • WI
5' 11" • 165LBS
L/R • 18yr 11mo
Travel Team: Prospects Training Academy
Rankings
2024 National
Rankings available to Premium Subscriber
2024 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
87
Velocity (max)
6/29/23
84 - 86
Velo Range
6/29/23
1578
Spin Rate (avg)
3/18/23
Changeup
73 - 77
Velo Range
6/23/23
1664
Spin Rate (avg)
3/19/22
Curveball
73 - 76
Velo Range
6/29/23
1725
Spin Rate (avg)
3/19/22
Slider
75 - 77
Velo Range
6/23/23
1785
Spin Rate (avg)
3/19/22
90.4
Exit Velocity (max)
7/12/22
82.1
Exit Velocity (avg)
7/12/22
317
Distance (max)
7/12/22
50
Sweet Spot %
7/12/22
23.2
Hand Speed (max)
7/12/22
69.7
Bat Speed (max)
7/12/22
13.4
Rot. Acc (max)
3/19/22
10
Hard Hit %
7/12/22
7.25
60
7/12/22
4.05
30-yd
7/12/22
1.74
10-yd
7/12/22
19.2
Run speed (max)
7/12/22
76
INF Velo
3/19/22
85
OF Velo
7/12/22
77
C Velo
3/18/23
1.93 - 2.06
Pop Time
3/18/23
Positional Tools
2023
2022
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.35
Pop Time
The athlete's fastest pop time in the given event year. Measured from glove to glove, in seconds (s).
1.93 - 2.06
Catcher Velocity
The athlete's maximum throwing velocity from the catcher position in the given event year. Measured in miles per hour (MPH).
77.0
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.
11.8
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.25
Pop Time
The athlete's fastest pop time in the given event year. Measured from glove to glove, in seconds (s).
1.94 - 2.01
Catcher Velocity
The athlete's maximum throwing velocity from the catcher position in the given event year. Measured in miles per hour (MPH).
77.0
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
76.0
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
85.0
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.
12.5
Top Prospect Games: Upperclass (Invite-Only)
Jul 12, 2022
Position
7.25
60-yard
1.94 - 2.00
Pop Time
85
OF Velo
76
C Velo
90
Exit Velo
Power Speed Score
Hitting
2023
2022
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
86.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
81.1
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
312
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
246
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
29.6
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.
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
90.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
80.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
317
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
182
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
19.3
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.
Milwaukee Preseason ID
Mar 18, 2023
Trackman - Hitting
86.4
Exit Velocity (max)
81.1
Exit Velocity (avg)
246
Distance (avg)
312
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Top Prospect Games: Upperclass (Invite-Only)
Jul 12, 2022
Trackman - Hitting
90.4
Exit Velocity (max)
82.1
Exit Velocity (avg)
248
Distance (avg)
317
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Milwaukee Preseason ID
Mar 19, 2022
Trackman - Hitting
83.7
Exit Velocity (max)
79.5
Exit Velocity (avg)
116
Distance (avg)
254
Distance (max)
Sweet Spot %
Line Drive %
Ground Ball %
Hitting
2023
2022
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
21.2
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.
67.4
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
65.0
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.
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
23.2
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
21.3
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
69.7
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
65.6
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.
Milwaukee Preseason ID
Mar 18, 2023
Blast - Hitting
21.2
Hand Speed (max)
20.1
Hand Speed (avg)
67.4
Bat Speed (max)
65.0
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Top Prospect Games: Upperclass (Invite-Only)
Jul 12, 2022
Blast - Hitting
23.2
Hand Speed (max)
22.3
Hand Speed (avg)
69.7
Bat Speed (max)
66.9
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Milwaukee Preseason ID
Mar 19, 2022
Blast - Hitting
22.1
Hand Speed (max)
20.3
Hand Speed (avg)
67.3
Bat Speed (max)
64.4
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2023
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
84.3
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
83.7
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).
1578
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.
18.9
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).
73.5
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).
1636
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).
74.4
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).
1659
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
75.0
Slider
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).
1593
Slider
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).
79.6
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
75.1
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).
1473
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.
18.6
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).
62.9
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).
1725
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).
74.4
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).
1664
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
68.6
Slider
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).
1785
Slider
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
Milwaukee Preseason ID
Mar 18, 2023
Trackman - Fastball
84.3
Velocity (max)
83.3 - 84.1
Velo Range
83.0
Eff Velocity (avg)
1,652
Spin Rate (max)
1,578
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Curveball
74.1
Velocity (max)
72.9 - 74.1
Velo Range
72.0
Eff Velocity (avg)
1,862
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 %
Trackman - Slider
75.9
Velocity (max)
74.3 - 75.7
Velo Range
73.7
Eff Velocity (avg)
1,733
Spin Rate (max)
1,593
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
75.8
Velocity (max)
73.1 - 75.8
Velo Range
73.2
Eff Velocity (avg)
1,783
Spin Rate (max)
1,659
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Milwaukee Preseason ID
Mar 19, 2022
Trackman - Fastball
79.6
Velocity (max)
63.9 - 79.6
Velo Range
77.8
Eff Velocity (avg)
1,599
Spin Rate (max)
1,473
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Trackman - Curveball
67.8
Velocity (max)
54.6 - 67.8
Velo Range
65.1
Eff Velocity (avg)
1,748
Spin Rate (max)
1,725
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Slider
74.5
Velocity (max)
62.1 - 74.5
Velo Range
71.2
Eff Velocity (avg)
1,910
Spin Rate (max)
1,785
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
75.3
Velocity (max)
73.8 - 75.1
Velo Range
72.9
Eff Velocity (avg)
1,772
Spin Rate (max)
1,664
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Pitch Scores
Pitching Velos
2023
2022
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
87.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
84.2
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.0
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
80.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
78.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
67.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
73.5
Game Performance
2023
2022
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.92
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.35
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.74
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.05
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.25
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
RSi
The reactive strength index measurement of an athlete's explosiveness by comparing their jump height to the ground contact time in between their jumps. On a scale of 0-5.
Milwaukee Preseason ID
Mar 18, 2023
Swift
1.92
10-yd
7.35
60-yd
18.8
Run speed (max)
1.46
RSi (max)
1.95
RSi (avg)
1,098
Jump Power (max)
Top Prospect Games: Upperclass (Invite-Only)
Jul 12, 2022
Swift
1.74
10-yd
4.05
30-yd
7.25
60-yd
19.2
Run speed (max)
8.3
Run Speed (avg)
1.27
RSi (max)
1.27
RSi (avg)
1,131
Jump Power (max)
Visual Edge
2022
Edge Score
The highest Edge Score within the given year. Edge Score is a comprehensive score that takes the core-six visual skills into account, providing an assessment of an athlete’s overall visual ability.
86.63
Pitch Ai
Notes
News
- Prep Baseball Wisconsin @ The Rock Invitational: Scout Blog - Apr 25, 2024
- Week 6 Diamond Notes - May 12, 2023
- Milwaukee Preseason ID: Quick Hits - Mar 28, 2023
- Milwaukee Preseason ID: Preview - Mar 16, 2023
- Unsigned Senior Showcase: Statistical Analysis - Oct 26, 2022
- Top Prospect Games MKE: Quick Hits - Jul 20, 2022
- Milwaukee Preseason ID: TrackMan Files - Mar 30, 2022
Comments
Draft Reports
Contact
Premium Content Area
To unlock contact information, you need to purchase a ScoutPLUS subscription.
Purchase Subscription OR
Login
Uncommitted. Roloff has been a key piece for the Lasers success all year as he is a versatile defender and an impact arm on the mound for the Lasers. This past week in two appearances Roloff tossed seven innings going 1-0 allowing two hits and striking out 11 batters on the week holding opponents to a .087 batting average against him.
Roloff started his impressive day off with a clean ‘pen. Standing at a projectable 5-foot-10, 160-pounds Roloff is an athletic, free mover downhill and he pairs it with a loose, whippy arm. During his ‘pen he ran his fastball up to 84.3 mph and this is a pitch that plays with life/carry through the zone, roughly 14’ of IVB on average. Roloff also showed a refined feel for three different offspeed pitches, the first being a low-70s curveball with downer action. He also spun in a mid-70s slider with tight 11/5 break. Behind the plate, Roloff is an advanced receiver and is quick out of the crouch that recorded pop-times in the 1.93-2.06 range. Offensively, Roloff features a smooth left-handed swing that is short and quick to the ball, and he registered exit velocities up to 86.4 mph.
Positional Profile: C/RHP
Body: 5-10, 160-pounds. Good proportions, high waist, lean, athletic, more fill coming.
Hit: LHH. Narrower set, slightly open. Fast hands, short to the ball, loft to the path, hitterish, drives the ball to pull side.
Power: 86 max exit velocity, averaged 81.1 mph. 312’ max distance.
Arm: RH. C - 77 mph. INF - mph. OF - mph. Loose, fluid arm action, 3/4 slot, accurate to the bag.
Defense: 1.93-2.06 pop times. Athletic mover out of the crouch, soft hands, quick transfer, fundamental blocker.
Run: 7.35 runner in the 60.
Delivery: High inline leg lift into. Aggressive down the mound.
Arm Action: RH. Clean, loose arm. 3/4 slot. Whippy.
FB: T84, 83-84 mph. Thrown downhill with life through the zone. T1652, 1578 average rpm.
CB: 73-74 mph. Downer action. Feel for the zone. T1862, 1636 average rpm.
SL: 74-76 mph. Tight 11/5 action. T1733, 1593 average rpm.
CH: 73-76 mph. Maintains arm speed. Heavy fading action with occasional depth. T1783, 1659 average rpm.
Roloff is a savvy left-handed-hitting catching prospect in Wisconsin’s junior class and across the summer and fall, he consistently showed well in front of our staff. Listed at an athletic 5-foot-10, 155-pounds, Roloff’s advanced defensive capabilities point to him sticking behind the plate in the long run as he has created lows of 1.93 pop times in front of our staff before. Roloff is actually somewhat new to the position, which is even more impressive, and he’s also looked like a natural at second base and in the outfield in front of us. Offensively, his hit tool is also something that sets him apart from his peers, as he consistently drives the ball hard to the entire field. Overall, Roloff has really made a name for himself inside this class after a productive 2022 campaign and he is a name to keep a close eye on as continue his high school career.
Roloff has blossomed into a real prospect in the state, as an athletic and versatile player with two-way potential. While he just caught and played the outfield at this event, you’d never know that Roloff is somewhat new to both positions. Behind the plate, he’s quick-twitch both inside of his transfer as well as out of the crouch defending his position on the bunt attempt. That quickness resulted in a pop range of 1.94-2.00 with 76 mph arm strength, and as you might expect, his athleticism and arm strength worked in the outfield too. There, he topped 85 mph to home and roamed the outfield grass smoothly, with above-average foot speed, measured at 19.2 mph during his 60-yard dash (7.25). Roloff’s left-handed bat is equally athletic, and he’s gained significant strength since he appeared at a March event. Here, Roloff reached a max exit speed over 90 mph – and given his presently slight 5-foot-10, 155-pound build – signals a bright future at the plate as well.
Positional Profile: C/RHP
Body: 5-10, 155-pounds. Thin, wiry, twitch
Hits: LHH. Narrow base, toe tap back, short trigger, hits slightly back of center
Power: 90 max exit velocity, averaged 82.1 MPH. 317' max distance.
Arm: RH. C-76 mph. OF-85 mph. Quick short draw. OF-Quick arm path. Loose. 3/4 slot. Carry to home.
Defense: 1.94-2.00 pop times. very quick transfer and quick right foot, quick out of the squat on a bunt
Run: 7.25 runner in the 60.