Kyle Harrison Worcester Red Sox Pitcher

       
 
Age: 23
Born: August 12, 2001
Birthplace: San Jose, CA
Height: 6-2
Weight: 210
Bats: Right
Throws: Left
   
Drafted: 3rd round, 2020 by SF
How Acquired: Acquired from San Francisco with James Tibbs, Jordan Hicks, and Jose Bello for Rafael Devers (June 2025)
College: (UCLA commit)
High School: De La Salle (CA)
   

Photo © milb.com
Pronunciation: ---
First Pro Contract: July 16, 2020
Signing Scout: N/A
Signing Bonus: $2,500,000
Rule 5 Draft Eligible: N/A
MLFA Eligible: N/A
   
Pro Debut: May 8, 2021 (San Jose)
Added to 40-man: August 22, 2023 (SF)
MLB Debut: August 22, 2023 (SF)
Service Time (1/25): 1 year, 41 days
Options Remaining: 3 (0 used)
Contract (2025): $760,000
   
Twitter: -
Instagram: @kyleharrison

 
 
 
 
 
     
  Scouting Report & Links      
         
  Physical Description: Medium frame, not overly athletic. Minimal remaining projection.

Mechanics: Throws from a low three-quarters arm slot starting on the third base side of the rubber. Some deception with his release, but hitters get a good look prior. Rhythmic delivery. High leg kick before long arm swing back with a stab before coming forward. Low release height and approach angle. Drive leg knee is almost on the ground when he releases the ball. Solid extension.

Fastball: 94-96 mph four-seamer, tops out at 98 mph. Heavy vertical movement. Has shown premium bat-missing ability. Command and control are a work in progress. Struggles to command to the glove side. Utilizes the pitch about two-thirds of the time. Has a lot of success against right-handed hitters. Red Sox have him adding a sinker also, but he did not use it in a game scouted shortly after trade. Potential plus offering.

Cutter: 87-90 mph. Newer pitch that he started to develop when he joined the Red Sox. Short, horizontal break. Lacks depth. Has already shown some viability as a pitch to generate weak contact early in counts. Potential average offering.

Slurve: 82-84 mph. 2-to-8 shape. Trending towards being more of a slider than a curve. Inconsistent. Flashes depth and bite at its best. Still a work in progress and likely to continue to evolve as the Red Sox tweak it. Potential below-average offering.

Changeup: 85-87 mph. Uses primarily against right-handed hitters. Has some drop. Lacks feel and will often miss uncompetitively. Potential fringe-average offering.
  Career Notes: Grandfather was a major league pitcher for the Braves and Astros from 1968 to 1971. Third-round pick by San Francisco in the shortened 2020 draft, received just shy of $2.5 million to sign away from his commitment to UCLA. Had a lot of success through Triple-A, posting impressive strikeout numbers. Was ranked as a top 20 prospect in all of baseball prior to the 2023 season. Posted mixed results with the Giants between 2023 and 2025, moving up and down to the minors and between the bullpen and the rotation. Acquired by the Red Sox in the Rafael Devers trade in June 2025, at which point he was optioned to Worcester to work on revising his pitch mix.

Summation: Potential back-end starter. Ceiling of a mid-rotation starter. High-variance arm even though he has major league experience with some evaluators believing he is a reliever long-term. Fastball is a potential carrying pitch, but is still working on developing the rest of his arsenal. Red Sox immediately started to modify his arsenal, adding a cutter and sinker and tweaking his breaking ball. Cutter already shows potential playing off his fastball, but breaking ball and changeup are works in progress.

Links

Podcast Ep #367: Rafael Devers Trade Emergency Pod (6.16.25)
 
   
     
    Pitching Stats                                          
  year team lg level org age w l era g gs sv ip h r er hr hbp bb so whip k/9 bb/9
2021 San Jose Giants Cal A SF 19 4 3 3.19 23 23 0 98.2 86 43 35 3 15 52 157 1.40 14.32 4.74
  2022 Eugene Emeralds Nwst A+ SF 20 0 1 1.55 7 7 0 29.0 19 8 5 2 1 10 59 1.00 18.31 3.10
  2022 Richmond Flying Squirrels East AA SF 20 4 2 3.11 18 18 0 84.0 60 30 29 11 7 39 127 1.18 13.61 4.18
  2023 ACL Giants Black ACL Rk SF 21 0 0 0.00 1 1 0 2.0 0 0 0 0 0 0 4 0.00 18.00 0.00
  2023 Sacramento River Cats PCL AAA SF 21 1 3 4.66 20 20 0 65.2 52 36 34 10 5 48 105 1.52 14.39 6.58
  2023 San Francisco Giants NL MLB SF 21 1 1 4.15 7 7 0 34.2 29 19 16 8 4 11 35 1.15 9.09 2.86
  2024 San Francisco Giants NL MLB SF 22 7 7 4.56 24 24 0 124.1 125 65 63 18 7 42 118 1.34 8.54 3.04
  2025 Sacramento River Cats PCL AAA SF 23 1 0 3.46 6 6 0 26.0 26 13 10 2 2 8 38 1.31 13.15 2.77
  2025 San Francisco Giants NL MLB SF 23 1 1 4.56 8 4 0 23.2 21 12 12 4 0 9 25 1.27 9.51 3.42
2025 Worcester Red Sox IL AAA Bos 23     stats                            
   
     
  Advanced Stats & Splits
   
     
  Awards   SoxProspects.com Awards  
  California League Pitcher of the Week (June 14-20, 2021)
California League Season-End All-Star (2021)
California League Pitcher of the Year (2021)
Northwest League Pitcher of the Month (May 2022)
Futures Game Selection (2022)
Futures Game Selection (2023)
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