Connor Seabold Bio
Connor Seabold is an American professional baseball pitcher who is a free agent. He has previously played in Major League Baseball for the Boston Red Sox, Colorado Rockies, Tampa Bay Rays, and Atlanta Braves, and in the KBO League for the Samsung Lions. Listed at 6 feet 2 inches and 190 pounds, he throws and bats right-handed.
Drafted in 2017, Seabold developed through the Philadelphia Phillies organization before reaching the majors with the Red Sox in 2021. His career has since taken him across multiple MLB clubs and overseas to South Korea, where he enjoyed his most sustained stretch of run prevention in 2024.
Early Life and Background
Seabold attended Newport Harbor High School in Newport Beach, California. As a junior in 2013, he posted a 2–6 win-loss record with a 1.97 earned run average, showing flashes of command despite limited run support. As a senior in 2014, he pitched to a 3.80 ERA and struck out 57 batters across 46 innings pitched.
The Baltimore Orioles selected him in the 19th round of the 2014 MLB draft, but Seabold did not sign. He instead chose to enroll at California State University, Fullerton, where he played college baseball. His family life was shaped by tragedy in August 2015, when his mother died at age 45 following a battle with cancer. He has two younger brothers, Cade and Carson.
Path to Baseball
Seabold quickly established himself as a dependable arm at Cal State Fullerton. As a freshman in 2015, he appeared in 22 games with 11 starts, going 5–4 with a 3.26 ERA across 69 innings while striking out 76 batters against only 12 walks. As a sophomore in 2016, he became the Titans’ Friday night starter a month into the season and pitched to a 7–6 record with a 2.48 ERA in 83 innings, earning All-Big West Conference second-team honors.
Following the 2016 college season, Seabold played in the Cape Cod Baseball League for the Yarmouth–Dennis Red Sox, helping the club win the league championship. As a junior in 2017, he started 18 games, going 11–5 with a 2.96 ERA and earning a spot on the All-Big West Conference first team. That performance set the stage for his selection in the 2017 MLB draft.
Connor Seabold Career
Early Career (2017–2019)
The Philadelphia Phillies selected Seabold in the third round, 83rd overall, of the 2017 MLB draft. He signed for $525,000 and made his professional debut with the Williamsport Crosscutters of the Low-A New York-Penn League, pitching to a 0.90 ERA over 10 innings. In 2018, he began the year with the Clearwater Threshers of the High-A Florida State League and earned a midseason promotion to the Reading Fightin Phils of the Double-A Eastern League. Across 23 starts that year, he compiled a 5–8 record with a 4.28 ERA and 132 strikeouts in 130⅓ innings.
In 2019, Seabold split time between Reading and Clearwater. Over seven starts with Reading, he went 3–1 with a 2.25 ERA, and he posted a 1.00 ERA in two appearances with Clearwater. An oblique injury cost him time during the year, but he recovered to make four starts in the Arizona Fall League for the Scottsdale Scorpions, going 1–0 with a 1.06 ERA and 22 strikeouts in 17 innings. He was also selected to the United States national baseball team for the 2019 WBSC Premier12, though he did not pitch in the tournament.
Boston Red Sox Era (2020–2022)
On August 21, 2020, Seabold was traded to the Boston Red Sox along with Nick Pivetta in exchange for Brandon Workman, Heath Hembree, and cash. He was added to Boston’s 40-man roster on November 20, 2020, and opened the 2021 season on the injured list with elbow soreness. After returning in July, he was assigned to the Triple-A Worcester Red Sox, where he went 4–3 with a 3.50 ERA and 52 strikeouts in 54 innings.
Seabold made his major league debut on September 11, 2021, starting against the Chicago White Sox at Guaranteed Rate Field and allowing two runs on three hits in three innings. He was optioned back to Worcester the next day and later pitched in the Arizona Fall League. In 2022, he shuttled between Worcester and Boston, going 0–4 with an 11.29 ERA in five MLB starts. On January 12, 2023, he was designated for assignment following Boston’s signing of Corey Kluber.
Colorado Rockies Era (2023)
On January 17, 2023, Seabold was traded to the Colorado Rockies in exchange for a player to be named later or cash. He struggled to a 7.18 ERA across 20 appearances and was moved to the bullpen on July 20. The Rockies released him on December 6, 2023.
Samsung Lions Era (2024)
On December 22, 2023, Seabold signed a one-year, $900,000 contract with the Samsung Lions of the KBO League. In 28 starts during the 2024 season, he posted an 11–6 record with a 3.43 ERA and 158 strikeouts across 160 innings, emerging as a frontline starter in the rotation. He became a free agent after the season ended.
Tampa Bay Rays and Atlanta Braves Era (2025)
On February 7, 2025, Seabold signed a minor league contract with the Tampa Bay Rays and was assigned to the Triple-A Durham Bulls. The Rays selected his contract on May 9, adding him to their active roster. In three appearances for Tampa Bay, he recorded a 1.35 ERA with five strikeouts across 6⅔ innings before being designated for assignment on August 8.
On August 10, 2025, Seabold was claimed off waivers by the Atlanta Braves. In four appearances for Atlanta, he struggled to a 9.82 ERA with five strikeouts across 3⅔ innings. The Braves designated him for assignment on September 22, and after clearing waivers he was sent outright to the Triple-A Gwinnett Stripers on September 24. He elected free agency on November 2.
Notable Events and Milestones
Seabold’s major league debut on September 11, 2021, against the Chicago White Sox marked the culmination of his rapid climb through the Phillies and Red Sox systems. His 2024 season with the Samsung Lions stands as his most productive professional year, with 11 wins, a 3.43 ERA, and 158 strikeouts in 160 innings. His Cape Cod League championship with the Yarmouth-Dennis Red Sox in 2016 also remains an early career highlight.
Connor Seabold Career Wins
Seabold’s most documented stretch of winning came during the 2024 KBO season with the Samsung Lions, where he went 11–6. Across his MLB stops, he has worked primarily as a depth starter and reliever rather than a long-term rotation fixture, with his major league win totals remaining limited.
KBO League Highlights
In 28 starts for the Samsung Lions in 2024, Seabold went 11–6 with a 3.43 ERA and 158 strikeouts over 160 innings. The performance marked his first sustained run of consistent run prevention as a professional and helped restore his value on the international market.
Other Wins and Performances
At Cal State Fullerton, Seabold posted an 11–5 record as a junior in 2017 and went 7–6 as a sophomore in 2016, anchoring the Titans’ weekend rotation. His Cape Cod League championship with the Yarmouth-Dennis Red Sox in 2016 added a notable summer milestone to his amateur résumé.
Connor Seabold Family
Family Background and Personal Life
Seabold has two younger brothers, Cade and Carson. Their mother died in August 2015 at age 45 following a battle with cancer, a loss that occurred as Seabold was preparing for his sophomore year at Cal State Fullerton.
2025 Season Performance
Seabold’s 2025 season began with a minor league contract signed with the Tampa Bay Rays in February. After a strong start at Triple-A Durham, he was added to the Rays’ active roster in May and posted a 1.35 ERA in three appearances before being designated for assignment in August. Claimed by the Atlanta Braves on August 10, he struggled to a 9.82 ERA in four outings before being designated for assignment again in September.
After clearing waivers, Seabold was assigned outright to the Triple-A Gwinnett Stripers on September 24. He elected free agency on November 2, 2025, closing the book on a turbulent year that included stops in two organizations and the end of his major league playing time for the season.