IP 30.3
ERA 5.04
WHIP 1.467
BB/9 3.3
SO/9 8.0
  • Full name Jacob Allen Bukauskas
  • Born 10/11/1996 in Ashburn, VA
  • Profile Ht.: 6'0" / Wt.: 208 / Bats: R / Throws: R
  • School North Carolina
  • Debut 04/20/2021
  • Drafted in the 1st round (15th overall) by the Houston Astros in 2017 (signed for $3,600,000).
    View Draft Report
    Bukauskas, whose first name is Jacob, reclassified as a high school junior to be part of the 2014 draft class and enroll at North Carolina a year early. The Diamondbacks drafted him that year anyway but he became a Tar Heel and made a jump as a sophomore, when he refined his slider to become one of the nation's top strikeout pitchers. Short but strong-bodied at a listed 6-foot, 201 pounds, Bukauskas features the nation's best breaking pitch, a slider that earns consistent 70 grades and even some 80s from area scouts. He has tremendous command of the 86-88 mph pitch with late, sharp bite and good tilt. He has better command of the slider than either his fastball or changeup, leading him to pitch off his slider more than big league pitchers would. The slider also helped him average 12.4 strikeouts per nine innings over 150 innings from the start of 2016 through April 2017. His fastball earns plus grades thanks to its velocity; it usually sits 95-97 mph early and settles in as a 92-94 mph pitch. It tends to lack movement even when he leaks out with his front shoulder and yanks the pitch. Bukauskas' changeup earned above-average grades as an amateur and in the summer of 2016 with USA Baseball's Collegiate National Team, but he was using it sparingly (5-10 times per game) as a junior, too infrequently for scouts to grade it more than average. The overall package leads many scouts to chalk Bukauskus up as a reliever, while others believe he could still start in the Sonny Gray/Lance McCullers mold. He's young for the class and has the swing-and-miss slider to land in the first 10 picks.

Top Rankings

Organization Prospect Rankings

Draft Prospects

Minor League Top Prospects

Top 100 Rankings

Best Tools List

  • Rated Best Slider in the Arizona Diamondbacks in 2020
  • Rated Best Slider in the Houston Astros in 2019

Scouting Reports

Career Transactions

  • Nashville Sounds placed RHP J.B. Bukauskas on the 7-day injured list.
  • Nashville Sounds activated RHP J.B. Bukauskas from the full-season injured list.
  • Nashville Sounds placed RHP J.B. Bukauskas on the full-season injured list.
  • Milwaukee Brewers invited non-roster RHP J.B. Bukauskas to spring training.
  • Milwaukee Brewers sent RHP J.B. Bukauskas outright to Nashville Sounds.
  • Milwaukee Brewers designated RHP J.B. Bukauskas for assignment.
  • Milwaukee Brewers activated RHP J.B. Bukauskas from the 60-day injured list.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to Nashville Sounds.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to ACL Brewers.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to ACL Brewers.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to ACL Brewers.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to Nashville Sounds.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to Nashville Sounds.
  • Milwaukee Brewers transferred RHP J.B. Bukauskas from the 15-day injured list to the 60-day injured list.
  • Milwaukee Brewers placed RHP J.B. Bukauskas on the 15-day injured list. Right lat strain.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Nashville Sounds activated RHP J.B. Bukauskas.
  • Nashville Sounds activated RHP J.B. Bukauskas.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers activated RHP J.B. Bukauskas from the 15-day injured list.
  • Milwaukee Brewers placed RHP J.B. Bukauskas on the 15-day injured list retroactive to September 25, 2023. Right ring finger tendon injury.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Milwaukee Brewers activated RHP J.B. Bukauskas.
  • RHP J.B. Bukauskas changed number to 45.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Milwaukee Brewers activated RHP J.B. Bukauskas from the 15-day injured list.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers sent RHP J.B. Bukauskas on a rehab assignment to Nashville Sounds.
  • Milwaukee Brewers placed RHP J.B. Bukauskas on the 15-day injured list retroactive to May 17, 2023. Cervical strain.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • Milwaukee Brewers recalled RHP J.B. Bukauskas from Nashville Sounds.
  • RHP J.B. Bukauskas assigned to Nashville Sounds.
  • Nashville Sounds placed RHP J.B. Bukauskas on the 7-day injured list.
  • Milwaukee Brewers optioned RHP J.B. Bukauskas to Nashville Sounds.
  • Milwaukee Brewers claimed RHP J.B. Bukauskas off waivers from Seattle Mariners.
  • Seattle Mariners designated RHP J.B. Bukauskas for assignment.
  • Seattle Mariners optioned RHP J.B. Bukauskas to Tacoma Rainiers.
  • Tacoma Rainiers activated RHP J.B. Bukauskas.
  • Seattle Mariners selected the contract of RHP J.B. Bukauskas from Tacoma Rainiers.
  • Seattle Mariners invited non-roster RHP J.B. Bukauskas and to spring training.
  • Seattle Mariners sent RHP J.B. Bukauskas outright to Tacoma Rainiers.
  • Tacoma Rainiers activated RHP J.B. Bukauskas.
  • Seattle Mariners designated RHP J.B. Bukauskas for assignment.
  • Seattle Mariners claimed RHP J.B. Bukauskas off waivers from Arizona Diamondbacks.
  • Arizona Diamondbacks designated RHP J.B. Bukauskas for assignment.
  • Arizona Diamondbacks recalled RHP J.B. Bukauskas from Reno Aces.
  • Salt River Rafters activated RHP J.B. Bukauskas.
  • Salt River Rafters activated RHP J.B. Bukauskas.
  • Reno Aces activated RHP J.B. Bukauskas from the 7-day injured list.
  • Reno Aces placed RHP J.B. Bukauskas on the 7-day injured list.
  • Arizona Diamondbacks optioned RHP J.B. Bukauskas to Reno Aces.
  • Arizona Diamondbacks activated RHP J.B. Bukauskas.
  • Arizona Diamondbacks sent RHP J.B. Bukauskas on a rehab assignment to Reno Aces.
  • RHP J.B. Bukauskas assigned to ACL D-backs Red.
  • Arizona Diamondbacks sent RHP J.B. Bukauskas on a rehab assignment to ACL D-backs Red.
  • Arizona Diamondbacks sent RHP J.B. Bukauskas on a rehab assignment to ACL D-backs Black.
  • Arizona Diamondbacks placed RHP J.B. Bukauskas on the 60-day injured list. Grade 2 teres major muscle strain.
  • Arizona Diamondbacks recalled RHP J.B. Bukauskas from Reno Aces.
  • Reno Aces placed RHP J.B. Bukauskas on the 7-day injured list.
  • Arizona Diamondbacks optioned RHP J.B. Bukauskas to Reno Aces.
  • Arizona Diamondbacks recalled RHP J.B. Bukauskas from Reno Aces.
  • Arizona Diamondbacks optioned RHP J.B. Bukauskas to Reno Aces.
  • Arizona Diamondbacks activated RHP J.B. Bukauskas.
  • Arizona Diamondbacks sent RHP J.B. Bukauskas on a rehab assignment to Reno Aces.
  • Arizona Diamondbacks placed RHP J.B. Bukauskas on the 10-day injured list. Right elbow flexor strain.
  • Arizona Diamondbacks recalled RHP J.B. Bukauskas from Diamondbacks Alternate Training Site.
  • P J.B. Bukauskas assigned to Diamondbacks Alternate Training Site from Reno Aces.
  • Arizona Diamondbacks optioned P J.B. Bukauskas to Reno Aces.
  • Arizona Diamondbacks selected the contract of RHP J.B. Bukauskas from Jackson Generals.
  • RHP J.B. Bukauskas assigned to Jackson Generals from Diamondbacks Alternate Training Site.
  • RHP J.B. Bukauskas assigned to Diamondbacks Alternate Training Site from Jackson Generals.
  • Arizona Diamondbacks invited non-roster RHP J.B. Bukauskas to spring training.
  • Jackson Generals activated RHP J.B. Bukauskas from the 7-day injured list.
  • Jackson Generals placed RHP J.B. Bukauskas on the 7-day injured list.
  • RHP J.B. Bukauskas assigned to Jackson Generals.
  • Arizona Diamondbacks traded RHP Zack Greinke and cash to Houston Astros for RHP Corbin Martin, RHP J.B. Bukauskas, 3B Josh Rojas and LF Seth Beer.
  • Corpus Christi Hooks activated RHP J.B. Bukauskas from the temporarily inactive list.
  • RHP J.B. Bukauskas assigned to American League Futures.
  • Corpus Christi Hooks placed RHP J.B. Bukauskas on the temporarily inactive list.
  • Houston Astros invited non-roster RHP J.B. Bukauskas to spring training.
  • RHP J.B. Bukauskas assigned to Corpus Christi Hooks from Buies Creek Astros.
  • RHP J.B. Bukauskas assigned to Buies Creek Astros from Quad Cities River Bandits.
  • Quad Cities River Bandits activated RHP J.B. Bukauskas from the 7-day disabled list.
  • Quad Cities River Bandits sent RHP J.B. Bukauskas on a rehab assignment to Tri-City ValleyCats.
  • Quad Cities River Bandits sent RHP J.B. Bukauskas on a rehab assignment to GCL Astros.
  • Quad Cities River Bandits placed RHP J.B. Bukauskas on the 7-day disabled list.
  • RHP J.B. Bukauskas assigned to Quad Cities River Bandits from Tri-City ValleyCats.
  • RHP J.B. Bukauskas assigned to Tri-City ValleyCats from Quad Cities River Bandits.
  • RHP J.B. Bukauskas assigned to Quad Cities River Bandits from Tri-City ValleyCats.
  • RHP J.B. Bukauskas assigned to Tri-City ValleyCats from GCL Astros.
  • RHP J.B. Bukauskas assigned to GCL Astros.
  • Houston Astros signed RHP J.B. Bukauskas.
  • RHP J.B. Bukauskas assigned to Collegiate National Team.

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