92.1
Velocity (max)
5/31/26
CLASS OF 2027
LHP
OF
Mason
Sims
Corona (HS) • CA
5' 11" • 176.8LBS
L/L • 17yr 10mo
Travel Team: MLB Breakthrough
5' 11" • 176.8LBSL/L • 17yr 10mo
Travel Team: MLB Breakthrough
Rankings
2027 National
Rankings available to Premium Subscriber
2027 State
Rankings available to Premium Subscriber
Commitment
Best Of Stats
Fastball
90.3 - 91.8
Velo Range
5/31/26
2074
Spin Rate (avg)
5/31/26
Changeup
-
Velo Range
948
Spin Rate (avg)
5/31/26
Slider
75.1 - 76.5
Velo Range
5/31/26
2111
Spin Rate (avg)
5/31/26
Positional Tools
Hitting
Hitting
Pitching
2026
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Fastball
Velocity Max
The maximum observed fastball velocity in the given event year. Measured in miles per hour (MPH).
92.1
Fastball
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
91.0
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).
2074
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.
22.8
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).
Changeup
Velocity Avg
The average velocity for all pitches of this type in the given event year. Measured in miles per hour (MPH).
81.1
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).
948
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).
75.8
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).
2111
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).
SoCal ProCase
May 31, 2026
Trackman - Fastball
92.1
Velocity (max)
90.3 - 91.8
Velo Range
91.7
Eff Velocity (avg)
2,236
Spin Rate (max)
2,074
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - Slider
77.3
Velocity (max)
75.1 - 76.5
Velo Range
75.4
Eff Velocity (avg)
2,375
Spin Rate (max)
2,111
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Zone %
Trackman - ChangeUp
81.1
Velocity (max)
81.6
Eff Velocity (avg)
948
Spin Rate (max)
948
Spin Rate (avg)
IVB (max)
IVB (avg)
HM (max)
HM (avg)
Extension (avg)
Release Ht (avg)
Spin Score (max)
Pitch Scores
Pitching Velos
Game Performance
Vizual Edge
Pitch Ai
Notes
News
Comments
5/31/26
After walking one and surrendering a lineout to left field, it became a strong finish for Sims in his outing, with three consecutive strikeouts as his stuff seemed to get better with each batter he faced. The Texas commit worked 90-92 mph with the fastball, showing occasional ride through the zone that helped the entire arsenal play up. While he doesn't possess an imposing frame, Sims is strong-bodied and athletic, allowing him to repeat his delivery and attack hitters with confidence. His ability to sequence pitches stood out as much as the raw stuff. Sims paired the fastball with a mid-70s slider and a highly effective changeup that averaged just 948 rpm, creating significant separation and deception off the fastball. His feel for sequencing was especially evident during his three-strikeout finish, as he mixed pitches effectively. Sims also displayed an uncomfortable look in left-on-left matchups, with one of his ABs coming against a top LHH in the 2028 class.
Draft Reports
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Physical
2026
Grip Strgth (LH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.
Grip Strgth (RH)
Grip strength is a measure of a players bat control and ability to transfer power and speed during impact, measured in pounds of force generated; collected with elbow bent at 90 degrees.