87
Velocity (max)
2/10/24
CLASS OF 2027
LHP
OF
Chase
Stieferman
Capital City (HS) • MO
5' 11" • 180LBS
L/L • 15yr 2mo
Travel Team: Inevitable A's National
5' 11" • 180LBS
L/L • 15yr 2mo
Travel Team: Inevitable A's National
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
85.2 - 86.3
Velo Range
2/10/24
2037
Spin Rate (avg)
2/22/23
Changeup
78 - 80
Velo Range
2/10/24
1464
Spin Rate (avg)
6/06/23
Curveball
73 - 76
Velo Range
2/10/24
1963
Spin Rate (avg)
2/22/23
Slider
75.1 - 76.3
Velo Range
2/10/24
1981
Spin Rate (avg)
2/10/24
94.4
Exit Velocity (max)
2/10/24
86.9
Exit Velocity (avg)
2/10/24
318
Distance (max)
2/10/24
78
Sweet Spot %
2/10/24
22.5
Hand Speed (max)
7/25/23
65.7
Bat Speed (max)
6/06/23
24.1
Rot. Acc (max)
7/25/23
-
Hard Hit %
7.33
60
2/10/24
4.26
30-yd
7/25/23
1.82
10-yd
7/25/23
17.3
Run speed (max)
7/25/23
79
INF Velo
2/22/23
82
OF Velo
2/10/24
-
C Velo
-
Pop Time
Positional Tools
2024
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)
7.33
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
82.0
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.
12.9
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
7.45
Infield Velocity
The athlete's maximum throwing velocity from an infield position in the given event year. Measured in miles per hour (MPH).
79.0
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
82.0
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.
12.0
Hitting
2024
2023
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
94.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
86.9
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
318
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
238
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
24.4
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).
89.3
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
79.8
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
302
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
196
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
21.1
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.
A's Scout Day
Feb 10, 2024
Trackman - Hitting
94.4
Exit Velocity (max)
86.9
Exit Velocity (avg)
238
Distance (avg)
318
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
A's Scout Day
Sep 23, 2023
Trackman - Hitting
88.9
Exit Velocity (max)
78.5
Exit Velocity (avg)
234
Distance (avg)
287
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
PBR Junior Future Games
Jul 25, 2023
Trackman - Hitting
88.4
Exit Velocity (max)
79.4
Exit Velocity (avg)
130
Distance (avg)
263
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
JFG Workout OK/MOKAN/MO
Jul 25, 2023
Trackman - Hitting
88.4
Exit Velocity (max)
79.4
Exit Velocity (avg)
130
Distance (avg)
263
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Top Prospect Games: Underclass (Invite-Only)
Jun 6, 2023
Trackman - Hitting
87.1
Exit Velocity (max)
81.5
Exit Velocity (avg)
245
Distance (avg)
302
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
A's Scout Day
Feb 22, 2023
Trackman - Hitting
89.3
Exit Velocity (max)
80.3
Exit Velocity (avg)
176
Distance (avg)
257
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.
22.5
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
20.5
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
65.7
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
62.4
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.
A's Scout Day
Sep 23, 2023
Blast - Hitting
21.1
Hand Speed (max)
19.6
Hand Speed (avg)
65.0
Bat Speed (max)
62.5
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
JFG Workout OK/MOKAN/MO
Jul 25, 2023
Blast - Hitting
22.5
Hand Speed (max)
21.1
Hand Speed (avg)
65.1
Bat Speed (max)
62.0
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
PBR Junior Future Games
Jul 25, 2023
Blast - Hitting
22.5
Hand Speed (max)
21.1
Hand Speed (avg)
65.1
Bat Speed (max)
62.0
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Top Prospect Games: Underclass (Invite-Only)
Jun 6, 2023
Blast - Hitting
22.2
Hand Speed (max)
21.0
Hand Speed (avg)
65.7
Bat Speed (max)
62.8
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).
86.7
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
85.8
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).
1940
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.
22.6
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).
74.3
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).
1941
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).
79.1
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).
1317
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).
75.7
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).
1981
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).
82.9
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).
1904
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).
69.7
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).
1963
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).
72.5
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).
1408
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).
71.3
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).
1874
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).
A's Scout Day
Feb 10, 2024
Trackman - Fastball
86.7
Velocity (max)
85.2 - 86.3
Velo Range
90.5
Eff Velocity (avg)
2,028
Spin Rate (max)
1,940
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
75.7
Velocity (max)
73.1 - 75.6
Velo Range
77.0
Eff Velocity (avg)
1,992
Spin Rate (max)
1,941
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
76.7
Velocity (max)
75.1 - 76.3
Velo Range
79.0
Eff Velocity (avg)
2,080
Spin Rate (max)
1,981
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
80.1
Velocity (max)
78.3 - 80.0
Velo Range
83.2
Eff Velocity (avg)
1,374
Spin Rate (max)
1,317
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
A's Scout Day
Sep 23, 2023
Trackman - Fastball
82.9
Velocity (max)
80.6 - 82.6
Velo Range
80.5
Eff Velocity (avg)
1,924
Spin Rate (max)
1,890
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
71.7
Velocity (max)
70.0 - 71.6
Velo Range
69.6
Eff Velocity (avg)
1,881
Spin Rate (max)
1,845
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
73.4
Velocity (max)
71.9 - 73.4
Velo Range
71.8
Eff Velocity (avg)
1,782
Spin Rate (max)
1,412
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
Top Prospect Games: Underclass (Invite-Only)
Jun 6, 2023
Trackman - Fastball
82.2
Velocity (max)
77.2 - 81.8
Velo Range
79.1
Eff Velocity (avg)
1,979
Spin Rate (max)
1,858
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)
72.6
Eff Velocity (avg)
1,933
Spin Rate (max)
1,933
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
73.4
Velocity (max)
70.5 - 73.4
Velo Range
71.6
Eff Velocity (avg)
1,945
Spin Rate (max)
1,464
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Spin Efficiency % (avg)
A's Scout Day
Feb 22, 2023
Trackman - Fastball
82.7
Velocity (max)
80.1 - 82.3
Velo Range
79.0
Eff Velocity (avg)
2,083
Spin Rate (max)
2,037
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
70.3
Velocity (max)
69.3 - 70.2
Velo Range
68.4
Eff Velocity (avg)
1,967
Spin Rate (max)
1,963
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
73.5
Velocity (max)
72.6 - 73.5
Velo Range
72.0
Eff Velocity (avg)
1,378
Spin Rate (max)
1,347
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
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
Pitching Velos
2024
2023
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)
85.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
74.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
79.0
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
75.5
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)
80.7
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
69.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.0
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
71.0
Game Performance
2023
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.82
30 Yard Dash
The athlete's fastest 0-30-yard split time in the given event year. Measured in seconds.
4.26
60 Yard Dash
The athlete's fastest 0-60-yard time in the given event year. Measured in seconds.
7.81
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Visual Edge
Pitch Ai
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