Lucas Sundberg Sims Bio
Lucas Sundberg Sims is an American professional baseball pitcher who has played in Major League Baseball for the Atlanta Braves, Cincinnati Reds, Boston Red Sox, Washington Nationals, and Chicago White Sox organizations. Born on May 10, 1994, in Snellville, Georgia, Sims was drafted in the first round of the 2012 MLB Draft by the Atlanta Braves with the 21st overall pick. He signed for a $1.65 million signing bonus and made his MLB debut in August 2017. Throughout his career, Sims has demonstrated resilience through various injuries and team transitions while establishing himself as a versatile pitcher capable of both starting and relieving roles. He married his wife Dani in 2017.
Early Life and Background
Lucas Sundberg Sims grew up in Snellville, Georgia, where he attended Brookwood High School. During his high school career, Sims developed into one of the top pitching prospects in the country. His impressive performances on the mound attracted attention from major league scouts, leading to his selection in the 2012 MLB Draft. Sims was considered one of the most promising young arms in Georgia, and his trajectory from high school directly to professional baseball demonstrated his exceptional talent and readiness for the minor leagues.
Path to Professional Baseball
After being drafted by the Atlanta Braves in 2012, Sims began his professional career in the rookie-level Gulf Coast League and Danville Braves organizations. He posted a 2-4 record with a 3.71 earned run average and 39 strikeouts across 34 innings pitched during his first professional season. The following year, Sims played for the Single-A Rome Braves, where he transitioned from the bullpen to the starting rotation. He flourished in that role, finishing with a 12-4 record, a 2.62 ERA, and 134 strikeouts in 116 and two-thirds innings. MLB.com ranked him as the Braves’ best prospect following the 2013 season.
Sims continued to climb the minor league ladder over the next several seasons. He played for the High-A Lynchburg Hillcats in 2014, going 8-11 with a 4.20 ERA. After spending time in the Arizona Fall League in 2015, where he started the Fall Stars Game, Sims began the 2016 season ranked as the Braves’ 13th-best prospect by Baseball America. He split that year between Mississippi and Gwinnett, finishing with a 7-11 record and 4.40 ERA before being added to the Braves’ 40-man roster after the season.
Lucas Sundberg Sims Career
Atlanta Braves (2017-2018)
Sims made his major league debut on August 1, 2017, against the Los Angeles Dodgers. He pitched six innings, allowing three earned runs while recording three strikeouts in a no-decision. Notably, his debut coincided with Ozzie Albies’ debut on the same day, marking the first time since 1968 that the Atlanta Braves started two players making their first major league appearance on the same day. Sims finished his rookie season with a 3-6 record and a 5.62 ERA across 13 appearances. He spent the beginning of 2018 in spring training but began the season with Triple-A Gwinnett before his mid-season trade.
Cincinnati Reds (2018-2024)
On July 30, 2018, the Braves traded Sims to the Cincinnati Reds in exchange for Adam Duvall, along with Matt Wisler and Preston Tucker. He made three appearances for Cincinnati that season, spending most of his time with Triple-A Louisville. Sims became a more regular member of the Reds’ rotation and bullpen starting in 2019. He made his first start as a Red on May 28, 2019, against the Pittsburgh Pirates. That year, he appeared in 24 games with a 2-1 record and 4.60 ERA, recording 57 strikeouts in 43 innings.
Sims enjoyed his most effective season in 2020, when he went 3-0 with a 2.45 ERA and 34 strikeouts in just over 25 innings of relief work across 20 appearances. In 2021, he continued his strong performance with a 5-3 record, 4.40 ERA, and 76 strikeouts in 47 innings. He gained attention during a rain-soaked home game against the Arizona Diamondbacks in April 2021 when he persistently asked home plate umpire Jerry Meals for new baseballs due to the wet conditions, eventually leading to a rain delay.
The 2022 season was derailed by injury for Sims. He appeared in only nine games, posting a 9.45 ERA with five strikeouts in six and two-thirds innings. He was placed on the injured list with a back injury on May 12 and underwent season-ending surgery on July 2 to address a herniated disc in his back. Sims returned in April 2023 and bounced back remarkably, compiling a 7-3 record with a 3.10 ERA and 72 strikeouts across 67 relief appearances in 61 innings pitched. In 2024, he made 43 appearances for Cincinnati before being traded, recording a 3.57 ERA with 40 strikeouts over 35 and one-third innings.
Boston Red Sox (2024)
On July 30, 2024, the Reds traded Sims to the Boston Red Sox in exchange for minor league pitcher Ovis Portes. He struggled during his time with Boston, appearing in 15 games with an 0-2 record and 6.43 ERA, managing just nine strikeouts over 14 innings of work. The transition to a new organization and different league presented challenges for Sims as he adjusted to his new surroundings.
Washington Nationals (2025)
Sims signed a one-year, $3 million contract with the Washington Nationals on February 19, 2025. However, his tenure with Washington was brief and difficult. In 18 appearances, he posted a 13.86 ERA with 13 strikeouts across 12 and one-third innings. The Nationals placed him on release waivers on May 9, 2025. Following his release, Sims signed a minor league contract with the Philadelphia Phillies on May 20, 2025. He appeared in 34 games for the Triple-A Lehigh Valley IronPigs, compiling a 4-1 record with a 5.56 ERA, 36 strikeouts, and one save over 34 innings. He elected free agency following the season on November 6, 2025.
Chicago White Sox (2026)
On January 30, 2026, Sims signed a minor league contract with the Chicago White Sox. He was released prior to the start of the regular season on March 20 but re-signed with the organization two days later on a new minor league deal. The White Sox selected his contract on April 1, adding him to their active roster. He made nine appearances for Chicago, registering an 0-2 record with a 4.50 ERA and 10 strikeouts over 10 innings. Sims was designated for assignment on April 23, cleared waivers, and elected free agency on April 25 before re-signing with the organization on a minor league contract two days later.
Driving Style and Strengths
Sims has showcased versatility throughout his career, successfully transitioning between starting and relief roles. He has demonstrated the ability to work effectively out of the bullpen, particularly during his standout 2020 and 2023 seasons with the Reds. His durability and ability to bounce back from injury have been notable aspects of his career, returning from season-ending back surgery in 2022 to post some of his best numbers in 2023. Sims has shown the capacity to handle high-pressure situations, appearing in numerous games across multiple seasons with various organizations.
Notable Events and Milestones
Several moments have defined Sims’ career trajectory. His MLB debut on August 1, 2017, alongside Ozzie Albies represented a historic moment for the Braves organization. His breakthrough 2020 season, where he went 3-0 with a 2.45 ERA, established him as an effective relief option. The 2021 rain-delay incident showcased his competitive nature and willingness to advocate for proper playing conditions. His recovery from back surgery in 2022 and subsequent strong 2023 campaign demonstrated his resilience and determination to continue his professional career at the highest level.
Lucas Sundberg Sims Career Wins
Throughout his MLB career spanning from 2017 through April 2026, Lucas Sundberg Sims has compiled a record of 23 wins against 21 losses across multiple organizations. He has recorded 376 strikeouts while maintaining a 4.85 earned run average. His career has included both starting and relieving roles, with his most productive stretches coming during his tenure with the Cincinnati Reds.
MLB Highlights
Sims’ most successful season came in 2023 with the Cincinnati Reds, where he went 7-3 with a 3.10 ERA across 67 relief appearances, recording 72 strikeouts in 61 innings. He also had strong campaigns in 2020 with a 3-0 record and 2.45 ERA in 20 appearances, and in 2021 when he posted a 5-3 record with 76 strikeouts. His career win totals have accumulated primarily through his ability to provide quality innings out of the bullpen while occasionally stepping into starting roles when needed. As of April 22, 2026, Sims has appeared in approximately 200 major league games across seven seasons.
Minor League and Other Performances
Prior to his MLB career, Sims established himself as a dominant minor league pitcher. His 2013 season with Single-A Rome Braves stands out as particularly impressive, as he went 12-4 with a 2.62 ERA and 134 strikeouts. That performance helped establish him as the Braves’ top prospect. His career in the minor leagues included stops at various levels, from rookie ball to Triple-A, providing him with extensive development experience before becoming a regular big league contributor.
Lucas Sundberg Sims Family
Family Background and Racing Lineage
While specific details about Sims’ family background and racing lineage are not extensively documented in available sources, he has maintained strong family connections throughout his professional career. As a Georgia native who grew up in Snellville and attended Brookwood High School, his local ties have remained important throughout his baseball journey.
Personal Life
Lucas Sundberg Sims married his wife Dani in 2017. The couple has maintained a relatively private personal life despite Sims’ public career in professional baseball. His marital status and relationship with Dani have been documented as part of his public profile, though specific details about their life together remain limited in publicly available sources.
2025 Season Performance
The 2025 season presented significant challenges for Lucas Sundberg Sims. After signing a one-year, $3 million contract with the Washington Nationals in February, Sims struggled significantly in his 18 appearances with the team. His 13.86 ERA reflected substantial difficulties in maintaining his performance standards, resulting in his placement on release waivers in May. The transition to a new organization and the pressures of a major league roster proved challenging during this period.
Following his release from Washington, Sims signed with the Philadelphia Phillies organization in late May. He spent the remainder of the season with Triple-A Lehigh Valley IronPigs, where he showed some improvement by compiling a 4-1 record with a 5.56 ERA across 34 appearances. The ability to secure wins at the Triple-A level indicated his potential for continued professional baseball despite the struggles experienced earlier in the season.
The 2025 season ultimately represented a transition year for Sims as he worked to re-establish himself at the minor league level after early difficulties. His performance with Lehigh Valley demonstrated his resilience and ability to contribute at the Triple-A level, setting the stage for his 2026 opportunity with the Chicago White Sox organization. The season highlighted both the challenges of professional baseball and the importance of perseverance in navigating roster changes and performance setbacks throughout a career.