74
Velocity (max)
6/15/23
CLASS OF 2026
RHP
OF
Jacob
Rienstra
Haslett (HS) • MI
5' 11" • 145LBS
R/R • 16yr 4mo
Travel Team: Split Finger
5' 11" • 145LBS
R/R • 16yr 4mo
Travel Team: Split Finger
Rankings
2026 National
Rankings available to Premium Subscriber
2026 State
Rankings available to Premium Subscriber
Commitment
UNCOMMITTED
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Best Of Stats
Fastball
72 - 74
Velo Range
6/15/23
1710
Spin Rate (avg)
3/11/23
Changeup
63.8 - 65
Velo Range
3/11/23
1346
Spin Rate (avg)
3/11/23
Curveball
63 - 64
Velo Range
6/15/23
1265
Spin Rate (avg)
3/11/23
83.7
Exit Velocity (max)
3/11/23
75.8
Exit Velocity (avg)
3/11/23
253
Distance (max)
3/11/23
78
Sweet Spot %
3/11/23
23.1
Hand Speed (max)
3/11/23
67.1
Bat Speed (max)
3/11/23
13.7
Rot. Acc (max)
3/11/23
-
Hard Hit %
-
INF Velo
70
OF Velo
3/11/23
-
C Velo
-
Pop Time
Positional Tools
2023
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Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
70.0
Hitting
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
83.7
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
75.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
253
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
152
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
19.9
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.
Scout Day: Capital City Kings/Splitfinger 3.11.23
Mar 11, 2023
Trackman - Hitting
83.7
Exit Velocity (max)
75.8
Exit Velocity (avg)
152
Distance (avg)
253
Distance (max)
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.
23.1
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
21.1
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
67.1
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
64.4
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.
Scout Day: Capital City Kings/Splitfinger 3.11.23
Mar 11, 2023
Blast - Hitting
23.1
Hand Speed (max)
21.1
Hand Speed (avg)
67.1
Bat Speed (max)
64.4
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
73.6
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
72.4
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).
1710
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.
23.6
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).
61.4
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).
1265
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).
64.4
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).
1346
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).
Scout Day: Capital City Kings/Splitfinger 3.11.23
Mar 11, 2023
Trackman - Fastball
73.6
Velocity (max)
71.5 - 73.3
Velo Range
69.1
Eff Velocity (avg)
1,786
Spin Rate (max)
1,710
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
62.4
Velocity (max)
60.5 - 62.4
Velo Range
57.4
Eff Velocity (avg)
1,300
Spin Rate (max)
1,265
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - ChangeUp
65.0
Velocity (max)
63.8 - 65.0
Velo Range
61.1
Eff Velocity (avg)
1,371
Spin Rate (max)
1,346
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
Pitching Velos
2023
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
74.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
72.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
63.0
Game Performance
Visual Edge
Pitch Ai
Notes
News
Comments
Draft Reports
Contact
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Jacob Rienstra: RHP/OF, (2026) Haslett, MI. 5-foot-11, 145-pound. (64.4 mph bat speed average). (21.1 mph hand speed average). Begins in a tall active stance with a big wrapping load, then uses a small leg kick. Produced some loud contact and found some barrels. Raw in the outfield, his best throws to the infield topped out at 70 mph; has a natural lengthy exchange, choppy developing feet, and developing firm hands. Movements laterally were developing and he fields the ball deep. Solid capable on the mound, used a moderate arm action with a high ¾ arm angle while showing quick good arm speed. Drop-and-drive type pitcher who shows high effort. Balance point is tall with even shoulders during delivery. Lands closed with upright recoil finish. (Max spin 1786; Avg 1710).