Juan Valera Greenville Drive Pitcher

       
 
Age: 19
Born: May 18, 2006
Birthplace: Sabana Grande de Palenque, DR
Height: 6-3
Weight: 205
Bats: Right
Throws: Right
   
Drafted: Not draft eligible
How Acquired: International free agent (April 2023)
ETA: Late 2027

Photo © Kelly O'Connor
Juan Valera photos by Kelly O'Connor
Pronunciation: -
First Pro Contract: April 12, 2023 (BOS)
Signing Scouts: Juan Carlos Calderon,
Rolando Pino & Todd Claus
Signing Bonus: $45,000
Rule 5 Draft Eligible: December 2027
MLFA Eligible: November 2029
   
Pro Debut: June 6, 2023 (DSL)
Added to 40-man: -
MLB Debut: -
Service Time (1/26): 0 days
Options Remaining: 3 (0 used)
Contract (2026): MiLB contract
   
Twitter:
Instagram: @j.valera30_n__

 
 
 
 
 
     
  Scouting Report & Links      
         
  Physical Description: Sturdy, developed pitcher's frame with some remaining projection in his upper body. Lower half looks the part. Physically mature for his age.

Mechanics: Throws from a three-quarters arm slot starting on the third base side of the rubber. Low release height. Delivery works. Uses a simplified wind-up. Even with the bases empty, throws from a position close to the stretch, facing third base and taking only a small step toward first before coming up and to the plate. Will sometimes pause at the top of his leg kick to vary his timing to the plate, especially with two strikes. Medium leg kick. Long arm swing behind, but clean coming forward. Lands on line to the plate and does a good job repeating his delivery. Very quick arm.

Fastball: 96-98 mph. Tops out at 100 mph. Four-seam fastball is most effective up in the zone, where it shows bat-missing ability. Fringy shape, but higher spin rate. Shows natural cut. Command is a work in progress, but already shows surprising feel for the zone for someone who throws as hard as he does. Potential plus pitch with improved command and control.

Slider: 88-92 mph. 10-to-4 break primarily, but varies his slot, giving the pitch different shapes. Will get on top of it when looking to add more depth and on the side when looking to have it run more horizontally. Flashes the ability to land it for strikes or bury it down and out of the zone when looking for whiffs. Potential average pitch.

Sweeper: 86-88 mph. Long, horizontal shape with minimal depth. Can blend in with his slider at times, but looked to be doing a better job differentiating between the two in spring training in 2026. High spin rate. Needs to find consistency with it in the zone. Potential above-average offering.

Changeup: 91-94 mph. Shape varies. Some look like two-seam fastballs, while others have substantial fade and some drop. Still looking to find consistency, especially with the ability to keep it competitive. Flashes bat-missing ability. Potential average offering with refinement.
  Career Notes: Signed to a modest bonus a few months into the 2023 IFA period and about a month before his 17th birthday. Worked out of the bullpen in the DSL with uninspiring results, but broke out in the FCL rotation in 2024, earning a promotion to Salem and recognition as a top 30 prospect in the system. Was part of a quartet of intriguing young arms from that FCL team, the other three of which (Ovis Portes, Yeferson Vargas, and Gilberto Batista) were all traded at the 2024 trade deadline, with the organization identifying him as the arm from that group to retain. Was named to 2025 Spring Breakout roster and pitched in 2025 Futures at Fenway South game. Stuff took a big step forward entering 2025, including 2-to-4-mph velocity upticks across his arsenal. Began 2025 as the second-youngest player in High-A behind Leo De Vries of the Padres. Missed three months of the 2025 season due to elbow soreness. Pitched in the 2026 Spring Breakout game.

Summation: High-variance pitching prospect with the ceiling of a mid-rotation starter. Has a lot of development remaining and reliever risk, but is one of the highest-ceiling arms in the Red Sox system. Stuff has steadily improved since he signed to the point at which he became arguably the system's top pitching prospect below Triple-A. Has the build you look for along with premium velocity. Secondary arsenal is a work in progress, but changeup and breaking balls flash potential. Continued refinement of secondaries will be key for him to reach his potential.

Links

Spring Training Video (3.14.2025)
Spring Training Video (3.22.2025)
Scouting Report Update (4.16.25)
Spring Training video (3.13.26)
 
   
     
    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
2023 DSL Red Sox DSL Rk Bos 17 3 1 5.93 15 1 0 27.1 27 22 18 0 7 20 31 1.72 10.21 6.59
2024 FCL Red Sox FCL Rk Bos 18 1 2 1.79 11 9 0 40.1 17 9 8 0 5 14 40 0.77 8.93 3.12
2024 Salem Red Sox Car A Bos 18 0 1 2.35 7 7 0 23.0 9 6 6 1 0 14 28 1.00 10.96 5.48
2025 Greenville Drive SAL A+ Bos 19 1 2 5.45 10 10 0 38.0 43 25 23 6 2 10 46 1.39 10.89 2.37
2026 Greenville Drive SAL A+ Bos 20     stats                            
   
     
  Advanced Stats & Splits
   
     
  Awards   SoxProspects.com Awards  
  Red Sox Minor League Starting Pitcher of the Month (July 2024)
2024 Florida Complex League All-Star
  SoxProspects.com Pitcher of the Week (July 15-21, 2024)
SoxProspects.com Pitcher of the Month (July 2024)
SoxProspects.com Pitcher of the Week (Aug 26 - Sept 1, 2024)
2024 SoxProspects.com All-Star
2024 SoxProspects.com Pitcher of the Year
2025 SoxProspects.com Pre-Season All-Star 
2026 SoxProspects.com Pre-Season All-Star 
 
   

   
     
 
 
 
     
 
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