Houston Astros The
Houston Astros selected Bukauskas with the 15th overall selection in the
2017 MLB draft. He signed with the Astros on July 7, 2017. He was assigned to the
Gulf Coast League Astros, and after one scoreless outing for them, was promoted to the
Tri-City ValleyCats where he finished the season, posting a 4.50 ERA in six innings pitched. In 2018, Bukauskas returned to pitch in the GCL and with the ValleyCats along with pitching for the
Quad Cities River Bandits,
Buies Creek Astros, and the
Corpus Christi Hooks, compiling a combined 4–2 record with a 2.14 ERA in 14 starts between the five teams; he missed time during the year due to injury. He returned to Corpus Christi to begin the 2019 season.
Arizona Diamondbacks The Astros traded Bukauskas,
Corbin Martin,
Seth Beer,
Joshua Rojas, and cash considerations to the
Arizona Diamondbacks in exchange for
Zack Greinke on July 31, 2019. He was assigned to the
Jackson Generals and finished the season there. Over 22 games (16 starts) between the two clubs, he went 2–5 with a 5.44 ERA. On November 20, 2020, Bukauskas was added to the 40-man roster. On April 18, 2021, Bukauskas was promoted to the major leagues for the first time. He made his MLB debut on April 20 against the
Cincinnati Reds, getting
Nick Senzel to fly out as the only batter he faced. On March 19, 2022, it was announced that Bukauskas had suffered a torn
teres major muscle and would be out for months. He was activated on July 21 and optioned to the Triple-A
Reno Aces. On January 11, 2023, Bukauskas was designated for assignment following the signing of
Zach Davies.
Seattle Mariners On January 17, 2023, Bukauskas was claimed off waivers by the
Seattle Mariners. On January 31, Bukauskas was designated for assignment by the Mariners following the waiver claim of
Tayler Saucedo. On February 2, he cleared waivers and was outrighted to the Triple-A
Tacoma Rainiers. On April 9, Bukauskas had his contract selected to the active roster after four appearances with Tacoma. He made one appearance for the Mariners, allowing two runs, one earned in an inning of relief work against the
Cleveland Guardians. He was designated for assignment on April 14, after
Tommy Milone was selected to the roster.
Milwaukee Brewers On April 18, 2023, Bukauskas was claimed off waivers by the
Milwaukee Brewers and optioned to the Triple-A
Nashville Sounds. After 5 appearances for the Sounds, Bukauskas was recalled to the Brewers on May 16. However, he was placed on the injured list with a
cervical strain four days later without appearing in a game for the Brewers. On July 1, Bukauskas was recalled by the Brewers. He made five scoreless appearances for Milwaukee in 2023, striking out six batters in six innings. Bukauskas was optioned to Triple-A Nashville to begin the 2024 season. He made six appearances for Milwaukee before he was placed on the injured list with a
lat strain on April 14. Bukauskas was transferred to the 60-day injured list on May 10. In six games for the Brewers, he posted a 1.50 ERA with six strikeouts across six innings pitched. On January 17, 2025, Bukauskas was
designated for assignment by Milwaukee. He cleared waivers and was sent to Triple-A Nashville on January 23. On February 25, it was announced that Bukauskas would undergo
lat surgery and miss the entirety of the 2025 season. On November 22, 2025, Bukauskas re-signed with the Brewers organization on a minor league contract. ==Pitching style==