Hiura spent three seasons in the Brewers farm system and was acclaimed as the organization's top prospect by his second minor league season. In 2019, he made his major league debut and posted a .303 batting average in 84 games. In the following three seasons, Hiura's statistics regressed, including a National League (NL)-leading 85 strikeouts in 2020 and a .168 batting average in 2021.
MLB.com ranked Hiura as Milwaukee's top prospect going into the 2018 season.[12] He began the 2018 season with the Carolina Mudcats of the High-ACarolina League[13] and was promoted to the Biloxi Shuckers of the Double-ASouthern League on June 1 after hitting .320 with seven home runs, 23 RBIs, and a .911 OPS in 50 games for Carolina. Hiura also won the 2018 Arizona Fall League MVP[14] Hiura finished the year with Biloxi, batting .272 with six home runs, twenty RBIs, and 11 stolen bases in 73 games.[15]
Hiura began 2019 with the San Antonio Missions.[16] On May 14, his contract was selected and he was called up to the major leagues.[17] He made his major league debut on May 14 versus the Philadelphia Phillies.[18]
On June 3, 2019, despite a strong showing in the majors, Hiura was sent back down to Triple-A to the San Antonio Missions in order to make room for Travis Shaw. Hiura returned to the Brewers on June 28 along with infielder Tyler Saladino, as Shaw returned to Triple-A and utility player Hernán Pérez was designated for assignment. On July 28, Hiura homered in the bottom of the 10th inning against the Chicago Cubs for his first career walk-off hit. In 2019, on defense he led all major league second basemen in errors, with 16.[19]
In the pandemic-shortened2020 season, Hiura batted .212/.297/.410 with 13 home runs and 32 RBI in 59 games. He led the National League in strikeouts (85), as well as putouts (66) and errors (16) by a second baseman. Hiura had a .168 batting average in 2021. In 2022, Hiura played in 80 games for Milwaukee and hit .226/.316/.449 with 14 home runs and 32 RBI.[20]
On January 13, 2023, Hiura agreed to a one-year, $2.2 million contract with the Brewers, avoiding salary arbitration.[21] On March 25, the Brewers announced that Hiura, who was out of options, did not make the Opening Day roster.[22] Hiura was designated for assignment two days later after the team signed Luke Voit.[23] Hiura went unclaimed on waivers and was sent outright to the Triple-A Nashville Sounds on March 28.[24] In 85 games for Triple–A Nashville, he batted .308/.395/.565 with 23 home runs and 77 RBI. On October 4, Hiura elected free agency.[25]
Detroit Tigers
On February 16, 2024, Hiura signed a minor league contract with the Detroit Tigers.[26] In 49 games with Triple-A Toledo Mud Hens, he hit .232/.312/.401 with 6 home runs and 24 RBI. Hiura was released by the Tigers organization on June 3.[27]
Los Angeles Angels
On June 11, 2024, Hiura signed a minor league contract with the Los Angeles Angels.[28] In 19 games for the Triple–A Salt Lake Bees, he hit .360/.429/.853 with 12 home runs and 21 RBI. On July 5, the Angels selected Hiura's contract, adding him to the major league roster.[29] In 10 games for Los Angeles, he went 4–for–27 (.148) with one RBI. On July 23, Hiura was designated for assignment by the Angels.[30] He cleared waivers and was sent outright to Salt Lake on July 27.[31] Hiura elected free agency on October 2.[32]