Sean Hjelle Bio
Sean Anthony Hjelle is an American professional baseball pitcher who is currently a free agent. Standing 6 feet 11 inches tall, he shares the distinction with former pitcher Jon Rauch as the tallest player in Major League Baseball history. Hjelle played college baseball for the University of Kentucky before launching his professional career with the San Francisco Giants organization.
Born on May 7, 1997, Hjelle progressed through the Giants minor league system after being selected in the 2018 MLB draft. He reached the major leagues in 2022 and served in a variety of relief roles with San Francisco over parts of four seasons before electing free agency in November 2025.
Early Life and Background
Sean Anthony Hjelle grew up in Mahtomedi, Minnesota, where he attended Mahtomedi High School. At Mahtomedi, he played both baseball and basketball, building the athletic foundation that would later support his professional career. As a high school pitcher, he developed a repertoire that included a two-seam fastball, a four-seam fastball, a changeup, and a cutter.
Despite his promising skill set, Hjelle was not selected in the MLB draft following high school. He chose to continue his baseball career at the University of Kentucky, where he joined the Kentucky Wildcats collegiate program and refined his craft on the mound.
Path to Baseball
Hjelle enrolled at the University of Kentucky and quickly established himself as one of the top pitchers in the Southeastern Conference. During his sophomore season in 2017, he was named the SEC Pitcher of the Year after posting a 9–2 record with a 3.17 earned run average in the regular season. Within conference play, he was even more dominant, finishing 7–1 with a 1.90 ERA.
As a junior in 2018, Hjelle made 15 appearances, including 14 starts, and compiled a 7–5 record with a 3.44 ERA. His strong college performance drew the attention of major league scouts and positioned him as one of the top pitching prospects in that year’s draft class.
Sean Hjelle Career
Early Career (2018–2020)
The San Francisco Giants selected Sean Anthony Hjelle in the second round of the 2018 Major League Baseball draft, with the 45th overall pick. He signed with the organization for a $1.5 million signing bonus and made his professional debut that summer with the Salem-Keizer Volcanoes. Across 12 starts in his first professional season, he posted a 5.06 ERA.
Hjelle opened the 2019 season with the Augusta GreenJackets of the Single-A South Atlantic League, where he served as the club’s Opening Day starter. After a promotion to the High-A San Jose Giants in May, he was later moved up to the Double-A Richmond Flying Squirrels in August. Over 28 total starts across the three affiliates in 2019, he went 7–9 with a 3.32 ERA. The 2020 minor league season was canceled because of the COVID-19 pandemic, keeping Hjelle off the mound for the entire year.
Minor League Development and MLB Debut (2021–2022)
In 2021, Hjelle pitched for the Sacramento River Cats of the Triple-A Pacific Coast League and continued to develop his command and secondary offerings. Following that season, the Giants added him to their 40-man roster, protecting him from the Rule 5 draft. He returned to Sacramento to begin the 2022 season.
Hjelle made his Major League debut on May 6, 2022. Later that year, on September 28, he earned his first career big league win after delivering four innings of one-run ball against the Colorado Rockies in a 6–3 victory. Between Sacramento and San Francisco in 2022, he was 7–10 with a 5.08 combined ERA across 30 total appearances.
San Francisco Giants Era (2023–2025)
The Giants optioned Hjelle to Sacramento to open the 2023 season, and he split the year between Triple-A and the major leagues. With San Francisco in 2023, he made 15 relief appearances, going 2–1 with a 6.52 ERA and 31 strikeouts over 29 innings. He returned to a larger major league role in 2024, appearing in 58 games out of the bullpen and posting a 3–4 record with a 3.90 ERA and 75 strikeouts across 80 and two-thirds innings.
Hjelle began the 2025 season back at Triple-A Sacramento before rejoining the Giants. In 12 appearances for San Francisco that year, he struggled to a 1–1 record and a 7.80 ERA with 11 strikeouts over 15 innings. On July 30, 2025, the Giants designated him for assignment. He cleared waivers and was sent outright to Sacramento on August 3, then elected free agency on November 6, 2025.
Notable Events and Milestones
Hjelle’s most celebrated milestones include his 2017 SEC Pitcher of the Year award, his first round selection in the 2018 MLB draft, his major league debut on May 6, 2022, and his first MLB win against the Colorado Rockies on September 28, 2022. He is also recognized alongside Jon Rauch as the tallest player in MLB history at 6 feet 11 inches.
Sean Hjelle Career Wins
Across his major league career with the San Francisco Giants from 2022 through 2025, Sean Anthony Hjelle compiled a combined 6–8 record in relief appearances, with his first victory coming on September 28, 2022, against the Colorado Rockies. His strongest major league season came in 2024, when he recorded three wins and posted a 3.90 ERA across 58 appearances.
MLB Highlights
Hjelle’s MLB career highlights include his debut on May 6, 2022, his first career win later that September, and a 2024 season in which he appeared in 58 games and struck out 75 batters over 80 and two-thirds innings. He served primarily as a middle reliever for San Francisco during his time in the majors.
Minor League and College Achievements
At the University of Kentucky, Hjelle was named the 2017 SEC Pitcher of the Year after a dominant sophomore campaign. In the minor leagues, he advanced steadily from Salem-Keizer through Augusta, San Jose, Richmond, and Sacramento, reaching Triple-A in 2021 and earning a spot on the Giants’ 40-man roster that offseason.
Sean Hjelle Family
Family Background and Racing Lineage
Sean Anthony Hjelle grew up in Mahtomedi, Minnesota, where he attended Mahtomedi High School and played baseball and basketball. He was not drafted out of high school and instead chose to attend the University of Kentucky to continue his baseball development.
Personal Life
Hjelle and his wife, Caroline, have two children. He signed a $1.5 million bonus with the Giants after the 2018 draft and has spent his professional career within the San Francisco organization before electing free agency in November 2025.
2025 Season Performance
Hjelle entered the 2025 season at Triple-A Sacramento after being optioned by the Giants. He was recalled to the major league club and appeared in 12 games out of the bullpen for San Francisco, finishing with a 1–1 record, a 7.80 ERA, and 11 strikeouts across 15 innings of work. His struggles led the Giants to designate him for assignment on July 30, 2025.
After clearing waivers, Hjelle was sent outright to Sacramento on August 3 and remained in the organization through the end of the season. On November 6, 2025, he elected free agency, closing a four-season major league tenure with the Giants that included a 6–8 combined record and one career save opportunity resolved as a win.
As Hjelle enters free agency, he remains one of the most physically imposing pitchers in professional baseball at 6 feet 11 inches tall. His combination of size, pitch variety, and major league relief experience positions him as a potential depth option for clubs seeking a tall, power-oriented arm out of the bullpen in 2026 and beyond.