@a_gonthier00 
88.3
Velocity (max)
2/14/25
CLASS OF 2026
RHP
Arthur
Gonthier
Humberside (HS) • ON
6' 4" • 190LBS
R/R • 18yr 3mo
Travel Team: Ontario Royals
6' 4" • 190LBS
R/R • 18yr 3mo
Travel Team: Ontario Royals
Rankings
2026 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
86 - 88
Velo Range
2/14/25
2310
Spin Rate (avg)
2/14/25
Changeup
80 - 82.5
Velo Range
2/14/25
1850
Spin Rate (avg)
2/14/25
Curveball
65 - 67
Velo Range
6/30/23
-
Spin Rate (avg)
Slider
69.8 - 73.3
Velo Range
2/14/25
2413
Spin Rate (avg)
2/14/25
Positional Tools
Hitting
Hitting
Pitching
2025
2024
2023
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Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
88.3
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
87.0
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).
2310
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.
26.5
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
71.9
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).
2413
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).
Splitter
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
81.5
Splitter
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).
1850
Splitter
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).
83.4
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
80.1
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).
2097
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
64.7
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).
2209
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).
Splitter
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
74.6
Splitter
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).
1665
Splitter
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).
83.6
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
80.5
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).
2088
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.
25.8
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
67.1
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).
2116
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).
Splitter
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
72.5
Splitter
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).
1530
Splitter
Total Movement Avg
The average total non-gravity movement for all pitches of this type in the given event year. Measured in inches (in).
2025 Mississauga Preseason Invite
Feb 14, 2025
Trackman - Fastball
88.3
Velocity (max)
86.0 - 88.0
Velo Range
85.6
Eff Velocity (avg)
2,436
Spin Rate (max)
2,310
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
73.3
Velocity (max)
69.8 - 73.3
Velo Range
71.7
Eff Velocity (avg)
2,485
Spin Rate (max)
2,413
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Splitter
82.5
Velocity (max)
80.0 - 82.5
Velo Range
80.6
Eff Velocity (avg)
1,500
Spin Rate (max)
1,850
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
2024 NY State Games (Session 1)
Jun 24, 2024
Trackman - Fastball
83.4
Velocity (max)
78.5 - 81.7
Velo Range
79.6
Eff Velocity (avg)
2,288
Spin Rate (max)
2,097
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
67.0
Velocity (max)
63.3 - 66.1
Velo Range
63.9
Eff Velocity (avg)
2,337
Spin Rate (max)
2,209
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Splitter
75.5
Velocity (max)
73.6 - 75.5
Velo Range
74.1
Eff Velocity (avg)
1,533
Spin Rate (max)
1,665
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
2023 Ontario Royals Scout Day
Oct 9, 2023
Trackman - Fastball
82.6
Velocity (max)
77.2 - 81.4
Velo Range
76.8
Eff Velocity (avg)
2,239
Spin Rate (max)
2,094
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
68.4
Velocity (max)
64.8 - 68.3
Velo Range
67.0
Eff Velocity (avg)
2,233
Spin Rate (max)
2,149
Spin Rate (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Splitter
74.0
Velocity (max)
70.8 - 73.9
Velo Range
69.4
Eff Velocity (avg)
1,537
Spin Rate (max)
1,592
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
2023 Spring Future Games Trials
Apr 7, 2023
Trackman - Fastball
83.6
Velocity (max)
81.5 - 83.5
Velo Range
81.8
Eff Velocity (avg)
2,133
Spin Rate (max)
2,081
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Trackman - Slider
70.1
Velocity (max)
66.0 - 70.0
Velo Range
68.8
Eff Velocity (avg)
2,102
Spin Rate (max)
2,061
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - Splitter
73.9
Velocity (max)
71.7 - 73.8
Velo Range
71.8
Eff Velocity (avg)
1,405
Spin Rate (max)
1,468
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Pitch Scores
2025
2024
2023
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
Slider
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Slider
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
Slider
Hammer+
A hammer breaking ball drops vertically with velocity through the zone, or 12-to-6 movement. Hammer+ of 100 is MLB average.
Slider
Sweep+
A sweeping breaking ball moves horizontally with velocity through the zone. Sweep+ 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
Pitching Velos
2025
2024
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
86.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
82.0
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)
80.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
64.5
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
79.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.2
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.0
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
72.0
Game Performance
2024
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.
Vertical Jump
A measure of any athlete's body strength and reach calculated from the flight time divided by the contact time.
Vizual Edge
Pitch Ai
Notes
News
Comments
2/14/25
Gonthier, a NY State Games alum, put together one of the more intriguing bullpens on the day and is a name college coaches need to know heading into the summer as a 6-foot-4, 190-pound uncommitted arm looking for a home in the fall of 2026. The Ontario Royals right-hander works downhill with a fastball that sat 86-88mph and was throwing it for strikes throughout. The secondary stuff includes a sweeping slider at 70-73mph and splitter at 80-82mph. Still has some feel to come for secondary stuff but the pitches work and it’s an intriguing overall package that continues to generate some buzz heading into the spring.
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