@duncan_bos 
78
Velocity (max)
1/28/23
CLASS OF 2025
LHP
OF
Duncan
Bos
Bainbridge (HS) • WA
6' 1" • 210LBS
L/L • 18yr 10mo
Travel Team: Sweets 18u
Rankings
2025 National
Rankings available to Premium Subscriber
2025 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
75 - 78
Velo Range
1/28/23
2034
Spin Rate (avg)
1/28/23
Changeup
57 - 58
Velo Range
9/27/20
-
Spin Rate (avg)
Curveball
60 - 61
Velo Range
6/12/21
1547
Spin Rate (avg)
9/27/20
Slider
64 - 68
Velo Range
1/28/23
1790
Spin Rate (avg)
1/28/23
95.9
Exit Velocity (max)
7/11/23
84.8
Exit Velocity (avg)
7/11/23
363
Distance (max)
7/11/23
53
Sweet Spot %
7/11/23
24.6
Hand Speed (max)
7/11/23
75
Bat Speed (max)
7/11/23
19.8
Rot. Acc (max)
1/28/23
33
Hard Hit %
7/11/23
7.71
60-yd
7/11/23
4.26
30-yd
7/11/23
1.81
10-yd
1/28/23
17.8
Run speed (max)
7/11/23
-
INF Velo
75
OF Velo
1/28/23
-
C Velo
-
Pop Time
Positional Tools
2023
2021
2020
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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).
75.0
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
8.30
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
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.
9.8
60 Yard Dash
The athlete's fastest 60-yard dash time in the given event year. Measured in seconds (s)
8.70
Outfield Velocity
The athlete's maximum throwing velocity from an outfield position in the given event year. Measured in miles per hour (MPH).
63.0
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.
8.2
Hitting
2023
2021
2020
Exit Velocity Max
The highest exit velocity of any batted ball in the given event year. Measured in miles per hour (MPH).
95.9
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
80.5
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
363
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
230
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
24.2
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).
81.7
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
69.2
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
280
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
171
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
34.6
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).
71.4
Exit Velocity Avg
Average exit velocity of all batted balls in the given event year. Measured in miles per hour (MPH).
65.6
Distance Max
The highest flight distance of any batted ball in the given event year. Measured in feet (ft).
227
Distance Avg
Average flight distance of all batted balls in the given event year. Measured in feet (ft).
150
Launch Angle Avg
Average launch angle of all batted balls in the given event year. Measured in degrees.
25.9
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.
Top Prospect Games (Invite-Only)
Jul 11, 2023
Trackman - Hitting
95.9
Exit Velocity (max)
84.8
Exit Velocity (avg)
257
Distance (avg)
363
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Seattle Preseason ID (SOLD OUT)
Jan 28, 2023
Trackman - Hitting
90.3
Exit Velocity (max)
75.6
Exit Velocity (avg)
199
Distance (avg)
326
Distance (max)
Hard Hit %
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Upperclass Summer Showcase (2022-2023)
Jun 12, 2021
Trackman - Hitting
81.7
Exit Velocity (max)
69.2
Exit Velocity (avg)
171
Distance (avg)
280
Distance (max)
Sweet Spot %
Line Drive %
Fly Ball %
Ground Ball %
Scout Day - City Baseball
Sep 27, 2020
Trackman - Hitting
71.4
Exit Velocity (max)
65.6
Exit Velocity (avg)
150
Distance (avg)
227
Distance (max)
Sweet Spot %
Fly Ball %
Ground Ball %
Hitting
2023
2021
2020
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
24.6
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
21.4
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
75.0
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
68.8
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.
22.1
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.
65.6
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
62.1
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.
Hand Speed Max
The highest Peak Hand Speed of any swing in the given event year.
19.8
Hand Speed Avg
The average Peak Hand Speed for all swings in the given event year.
17.8
Bat Speed Max
The highest Bat Speed of any swing in the given event year.
61.7
Bat Speed Avg
The average Bat Speed for all swings in the given event year.
57.1
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.
Top Prospect Games (Invite-Only)
Jul 11, 2023
Blast - Hitting
24.6
Hand Speed (max)
22.0
Hand Speed (avg)
75.0
Bat Speed (max)
69.7
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Seattle Preseason ID (SOLD OUT)
Jan 28, 2023
Blast - Hitting
23.4
Hand Speed (max)
20.9
Hand Speed (avg)
72.3
Bat Speed (max)
68.0
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Upperclass Summer Showcase (2022-2023)
Jun 12, 2021
Blast - Hitting
22.1
Hand Speed (max)
20.0
Hand Speed (avg)
65.6
Bat Speed (max)
62.1
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Scout Day - City Baseball
Sep 27, 2020
Blast - Hitting
19.8
Hand Speed (max)
17.8
Hand Speed (avg)
61.7
Bat Speed (max)
57.1
Bat Speed (avg)
Rot. Acc (max)
Rot. Acc (avg)
On Plane Eff (avg)
MaxOnPlaneEfficiency
Pitching
2023
2021
2020
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
77.5
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
76.5
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).
2034
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.
26.6
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
66.1
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).
1790
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).
69.6
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
67.2
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).
2004
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.
29.9
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).
60.7
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).
1449
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).
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
68.8
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
66.8
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).
1687
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.
25.3
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).
56.1
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).
1547
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).
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
58.0
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).
1342
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).
Seattle Preseason ID (SOLD OUT)
Jan 28, 2023
Trackman - Fastball
77.5
Velocity (max)
75.2 - 77.5
Velo Range
78.7
Eff Velocity (avg)
2,154
Spin Rate (max)
2,034
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Trackman - Slider
68.6
Velocity (max)
64.4 - 67.9
Velo Range
67.3
Eff Velocity (avg)
1,910
Spin Rate (max)
1,790
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Spin Efficiency % (avg)
Upperclass Summer Showcase (2022-2023)
Jun 12, 2021
Trackman - Fastball
69.6
Velocity (max)
65.0 - 69.4
Velo Range
65.8
Eff Velocity (avg)
2,136
Spin Rate (max)
2,004
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Trackman - Curveball
61.0
Velocity (max)
60.4 - 61.0
Velo Range
58.5
Eff Velocity (avg)
1,563
Spin Rate (max)
1,449
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Scout Day - City Baseball
Sep 27, 2020
Trackman - Fastball
68.8
Velocity (max)
65.6 - 67.9
Velo Range
62.9
Eff Velocity (avg)
1,752
Spin Rate (max)
1,687
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Trackman - Curveball
56.7
Velocity (max)
55.6 - 56.7
Velo Range
52.4
Eff Velocity (avg)
1,600
Spin Rate (max)
1,547
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Slider
58.5
Velocity (max)
57.5 - 58.4
Velo Range
53.7
Eff Velocity (avg)
1,550
Spin Rate (max)
1,342
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Pitch Scores
2021
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
2023
2021
2020
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
78.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
76.5
Slider
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.0
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
70.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
67.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
60.5
Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
68.0
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
66.5
Curveball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
55.5
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH)
57.5
Game Performance
2023
10 Yard Dash
The athlete's fastest 0-10-yard split time in the given event year. Measured in seconds.
1.81
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.
7.71
Top Speed (MPH)
The athlete's fastest split time converted to miles per hour.
Seattle Preseason ID (SOLD OUT)
Jan 28, 2023
Swift
1.81
10-yd
4.28
30-yd
16.6
Run speed (max)
1,309
Jump Power (max)
22.0
Jump Height (max)
22.0
Jump Height (avg)
Vizual Edge
Pitch Ai
Notes
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Comments
Draft Reports
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Positional Profile: LHP/OF
Body: 5-11, 175-pounds.
Delivery: Simple mechanics with an easy, repeatable delivery. Gets into leg lift with a strong back leg and slight bend in lower half. Big coil into rear hip as front knee drives up and back. Pushes down slope with level shoulders and stays connected to the ground. Late extension out front
Arm Action: LH. High takeaway after hand break. Ball works straight back as arm stays bent/compact. Quick arm action into landing with 3/4 release. Whippy out front with late acceleration through the baseball.
FB: T78, 75-78 mph. T2154, 2034 average rpm.
SL: 64-68 mph. T1910, 1790 average rpm.
Positional Profile: LHP/OF
Body: 5-11, 175-pounds.
Hits: LHH. Square set-up to the pitcher with straight alightment from upper and lower half. Starts slightly crouched, uses a short forward step into a toe-tap move. Back heel gets down to initiate swing. Stays tall in posture with sturdy base and strong front side at contact Hands keep barrel tight to body early then pull back with a short load and a deep scap move. Creates some counter rotation with upper half to increease tension in core. Quick, strong hands with a slightly lofted swing path and natural lift
Power: 90 max exit velocity, averaged 75.6 MPH. 326' max distance.
Arm: LH. OF-75 mph. Clean arm aciton with a full, continuous arm circle out of hand break. Works into a high 3/4 release with some looseness out front and stays on top of the baseball. Good carry out of hand
Defense: Short, active footwork when coming through the play in the OF. Gives a consistent breakdown with lower half as glove side receives ball in then transitions into exchange. Side shuffle for momentum with a high glove side with a tight finish after release. Backside comes through after the throw