Robert Stock Worcester Red Sox Pitcher

       
 
Born: November 21, 1989
Birthplace: Bellevue, WA
Height: 6-1
Weight: 215
Bats: Left
Throws: Right
   
Drafted: 2nd round, 2009 by STL
How Acquired: Claimed off waivers from PHI (July 2020); Minor league free agent (Jan. 2024)
College: USC
High School: Agoura (CA)
   

Photo © Kelly O'Connor
Pronunciation: ---
First Pro Contract: June 17, 2009 (STL)
Signing Scout: Jamal Strong
Signing Bonus: $525,000
Rule 5 Draft Eligible: December 2025
MLFA Eligible: November 2025
   
Pro Debut: June 23, 2009 (Johnson City)
Added to 40-man: -
MLB Debut: June 24, 2018 (SD)
Service Time (1/25): 2 years, 30 days
Options Remaining: 0 (3 used)
Contract (2025): MiLB contract
   
Twitter: @RobertStock6
Instagram: @stockrobert21
 
 
 
 
 
     
  Scouting Report & Links      
         
  Physical Description: Average-sized pitcher's frame. Filled out lower half. No remaining projection.

Mechanics: Began throwing exclusively from a low three-quarters arm slot in the Mexican winter league in 2024. Began varying arm angles in 2023 to be able to most effectively throw his sinker after spending most of his pitching career at a more typical three-quarters slot. Pitches from the stretch at all times. Will move to different sides of the rubber to change his release point, even to the same batter. Falls to third base side following release.

Fastball: With current arm slot, relies on a sinker added in 2023 with the Brewers that sits 94-95 mph with arm-side movement. Also throws a four-seam fastball that sits at about the same velocity, but once sat 97-99 mph, topping out at 101 mph. Fringe-average control and command.

Cutter: High-80s.

Slider: 82-85 mph. Average pitch that has flashed plus in the past.

Changeup: 82-85 mph. Mostly uses against lefties.


  Career Notes: Highly-regarded two-way player in high school, considered to have high first-round pick potential. Passed on the draft and enrolled in an honors program at USC. Pitched and played catcher at USC. Was an All-Star in the Cape Cod League in 2007 and 2008. Spent three seasons as a full-time catcher in the Cardinals system after being drafted in 2009. Converted to pitching full-time in 2013. St. Louis released him in December 2014. Caught on with the Pirates organization for the 2015 season, the pitched for the independent New Jersey Jackals in 2016. Signed with the Reds in 2017 after touching 101 mph in offseason workouts, then spent two years with San Diego before landing with Philadelphia then Boston following waiver claims. Made 10 appearances with the Red Sox during the COVID-shortened 2020 season. Was designated for assignment during the offseason and went on to have stints in the Cubs and Mets organizations in 2021. Tore his hamstring running the bases during a start for the Mets in July 2021 and missed the rest of the season. Pitched in Korea in 2022. Pitched for Israel in the 2023 World Baseball Classic. Spent two months in the Milwaukee organization in 2023 before signing with the independent Long Island Ducks. Pitched in Mexico in both the summer and winter of 2024. Won the Mexican winter league triple crown in 2024, leading the league in ERA, wins, and strikeouts.

Summation: Journeyman who changed his arm slot to great success in winter ball in 2024. Profiles as Triple-A depth. Has spent most of his recent career starting, but arm slot change makes him an interesting relief candidate as well. Pays close attention to pitch analytics and how he can improve his arsenal. Will change looks to attack hitters in unorthodox ways, moving on the rubber and changing arm slots.

Links
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    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
2007 USC Pac10 NCAA --- 17 2 2 4.55 14 0 2 29.2 25 16 15 2 4 14 25 1.31 7.58 4.25
  2008 USC Pac10 NCAA --- 18 1 1 3.60 11 0 3 10.0 9 5 4 0 1 4 17 1.30 15.30 3.60
  2009 USC Pac10 NCAA --- 19 5 4 2.90 20 9 4 77.2 61 32 25 4 23 39 86 1.29 9.97 4.52
  2012 Quad Cities River Bandits Midw A StL 22 5 2 4.56 38 2 0 71.0 61 46 36 9 11 48 66 1.54 8.37 6.08
  2013 Peoria Chiefs Midw A StL 23 0 1 2.30 14 0 4 15.2 11 4 4 0 3 10 15 1.34 8.62 5.74
  2013 Palm Beach Cardinals FSL A+ StL 23 2 0 4.37 18 0 0 22.2 20 14 11 2 4 16 27 1.59 10.72 6.35
  2014 Peoria Chiefs Midw A StL 24 2 3 5.18 24 0 0 40.0 42 23 23 1 3 21 30 1.58 6.75 4.73
  2014 Palm Beach Cardinals FSL A+ StL 24 0 0 2.31 11 0 1 23.1 15 8 6 0 1 25 13 1.71 5.01 9.64
  2015 GCL Pirates GCL Rk Pit 25 0 0 0.00 2 0 0 3.0 2 0 0 0 0 1 2 1.00 6.00 3.00
  2015 Bradenton Marauders FSL A+ Pit 25 0 0 7.00 7 0 1 9.0 12 7 7 0 0 8 4 2.22 4.00 8.00
  2015 Altoona Curve East AA Pit 25 0 0 14.54 3 0 0 4.1 2 9 7 0 0 10 4 2.77 8.31 20.77
  2016 New Jersey Jackals CanAm Ind --- 26 1 2 2.85 52 0 5 60.0 47 24 19 1 3 40 73 1.45 10.95 6.00
  2017 Daytona Tortugas FSL A+ Cin 27 1 3 2.52 16 0 2 25.0 18 7 7 1 1 8 25 1.04 9.00 2.88
  2017 Pensacola Blue Wahoos Sou AA Cin 27 8 2 2.98 25 0 0 45.1 39 16 15 0 1 21 36 1.32 7.15 4.17
  2018 San Antonio Missions Tex AA SD 28 1 0 2.00 8 0 1 9.0 7 4 2 1 0 3 15 1.11 15.00 3.00
  2018 El Paso Chihuahuas PCL AAA SD 28 0 0 1.59 24 0 8 28.1 15 8 5 2 1 11 27 0.92 8.58 3.49
  2018 San Diego Padres NL MLB SD 28 1 1 2.50 32 0 0 39.2 37 13 11 1 2 13 38 1.26 8.62 2.95
  2019 AZLPadres 2 Ariz Rk SD 29 0 0 0.00 2 2 0 2.0 0 0 0 0 0 0 5 0.00 22.50 0.00
  2019 El Paso Chihuahuas PCL AAA SD 29 3 0 4.13 25 3 0 28.1 36 14 13 6 3 19 40 1.94 12.71 6.04
  2019 San Diego Padres NL MLB SD 29 1 0 10.12 10 0 0 10.2 14 14 12 2 1 8 15 2.06 12.66 6.75
  2020 Boston Red Sox AL MLB Bos 30 0 1 4.73 10 0 0 13.1 16 9 7 0 0 10 14 1.95 9.45 6.75
  2021 Syracuse Mets TAE AAA NYM 31 1 0 2.87 4 4 0 15.2 16 7 5 1 0 8 14 1.53 8.00 4.60
  2021 New York Mets NL MLB NYM 31 0 1 5.40 2 2 0 5.0 6 3 3 2 0 3 6 1.80 10.80 5.40
  2021 Iowa Cubs TAE AAA ChC 31 0 3 4.12 8 2 0 19.2 17 10 9 4 1 4 25 1.07 11.40 1.80
  2021 Chicago Cubs NL MLB ChC 31 0 1 11.25 1 1 0 4.0 4 5 5 1 1 6 3 2.50 6.80 13.50
  2022 Doosan Bears KBO Fgn --- 32 9 10 3.60 29 29 0 165.0 162  87 66 9 10 83 138 1.49 7.50 4.50
  2023 Long Island Ducks Atl Indy ---  33 9 4 4.40 16 16 0 102.1 103 55 50 9 12 33 92 1.33 8.09 2.90
  2023 Nashville Sounds IL AAA Mil 33 0 3 8.22 11 4 0 23.0 29 22 21 6 5 18 19 2.04 7.43 7.04
  2024 Dos Laredos Tecolotes Mex Fgn --- 34 9 4 3.38 19 19 0 98.2 109 44 37 2 5 41 104 1.52 9.5 3.7
  2025 Worcester Red Sox IL AAA Bos 35     stats                            
   
     
  Awards   SoxProspects.com Awards  
  2009 Appalchian Season-End All-Star   -  
   

   
     
 
 
 
     
 
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