Brett de Geus is an American professional baseball pitcher who has spent parts of multiple seasons in Major League Baseball with six different organizations. Born on November 4, 1997, in Pleasanton, California, de Geus has built a journeyman career as a relief pitcher, appearing in the major leagues with the Texas Rangers, Arizona Diamondbacks, Seattle Mariners, Miami Marlins, Toronto Blue Jays, and Philadelphia Phillies between 2021 and 2025. His professional career began after he was selected by the Los Angeles Dodgers in the 33rd round of the 2017 MLB Draft.
Brett de Geus Bio
Brett de Geus is a right-handed pitcher who has navigated an unconventional path through professional baseball. Unlike many top prospects who receive early draft selections, de Geus went unselected after high school in 2015, forcing him to spend two seasons developing at the junior college level before hearing his name called in the 2017 MLB Draft. His persistence and adaptability have defined his career, as he has bounced between MLB organizations and the minor leagues while continuing to pursue his dream of sustained major league success.
Early Life and Background
De Geus grew up in Pleasanton, California, a city in the San Francisco Bay Area known for producing baseball talent. He attended Foothill High School in Pleasanton, where he played baseball and drew attention as a promising pitcher. Despite his abilities on the mound, de Geus went unselected in the 2015 MLB Draft, a setback that led him to continue his baseball career at the collegiate level.
De Geus enrolled at Cabrillo College in Aptos, California, a junior college program that has produced numerous professional players. As a freshman during the 2016 season, he made an immediate impact by earning all-conference honors, demonstrating his potential as a college-level performer. His performance only improved in his sophomore season, as he emerged as one of the top pitchers in the conference.
Path to Professional Baseball
The 2017 season marked a breakthrough for de Geus at Cabrillo College. Over 16 appearances, including 14 starts, he posted a remarkable 9-3 record with a 1.94 earned run average. His dominance on the mound, combined with his ability to work deep into games, caught the attention of professional scouts. His 1.94 ERA ranked among the best in the state, and his nine wins represented a significant achievement for a starting pitcher.
Following the conclusion of his sophomore season, de Geus entered the 2017 MLB Draft. The Los Angeles Dodgers selected him in the 33rd round with the 1,000th overall selection, a pick that represented both a professional opportunity and validation of his journey from undrafted high school player to junior college star. He signed with the Dodgers shortly after being selected, officially beginning his professional career.
Brett de Geus Career
Los Angeles Dodgers Organization (2017–2020)
De Geus made his professional debut in 2018 with the Ogden Raptors, a Pioneer League affiliate of the Los Angeles Dodgers. The transition to professional baseball proved challenging, as he struggled to a 4-5 record with a 7.26 ERA over 15 appearances, including 14 starts. The elevated competition and offensive environments of the Pioneer League presented a learning curve for the young pitcher.
De Geus showed significant improvement in 2019, beginning the season with the Great Lakes Loons before earning a promotion to the Rancho Cucamonga Quakes in June. Working exclusively out of the bullpen, he excelled in relief, compiling a 6-2 record with a spectacular 1.75 ERA across 39 appearances. He struck out 72 batters in 61 and two-thirds innings, showcasing dominant stuff that translated to professional success. Following the regular season, de Geus was selected to play in the prestigious Arizona Fall League, where he earned All-Star honors, further establishing himself as an organizational prospect worth watching.
Prior to the 2020 season, de Geus received an invitation to major league spring training as a non-roster invitee, his first taste of big league camp. However, the minor league season was canceled due to the COVID-19 pandemic, denying him the opportunity to build on his 2019 success. He did not appear in any professional games that year.
Texas Rangers (2021)
On December 10, 2020, the Texas Rangers selected de Geus with the second overall pick in the Rule 5 Draft, acquiring him from the Dodgers organization. This selection represented a significant opportunity, as Rule 5 players must remain on the selecting team’s major league roster for the entire season or be offered back to their original organization. De Geus made the Rangers’ Opening Day roster for 2021, officially becoming a major league pitcher.
On April 1, 2021, de Geus made his MLB debut, entering a game in relief and surrendering three earned runs in one inning pitched. While the debut did not go as planned, it marked the culmination of his journey from junior college to the majors. De Geus appeared in 19 games for the Rangers, but struggled with an 8.44 ERA. On June 23, 2021, the Rangers designated him for assignment, opening the door for another organization to claim him.
Arizona Diamondbacks (2021–2022)
On June 25, 2021, the Arizona Diamondbacks claimed de Geus off waivers from the Rangers. The change of scenery proved beneficial, as he posted a 3-2 record with a 6.56 ERA and 15 strikeouts across 28 relief appearances for Arizona. His performance represented a significant improvement from his time in Texas, demonstrating his ability to contribute at the major league level when given regular opportunities.
Following the 2021 season, the Diamondbacks outrighted de Geus to Triple-A Reno on November 30 after he cleared waivers. He began the 2022 season with the Double-A Amarillo Sod Poodles, where he made 17 appearances and struggled to a 5.96 ERA with a 2-1 record. On June 7, 2022, de Geus was released by the Diamondbacks organization, ending his tenure with the club that had given him his best major league opportunity to that point.
Atlantic League and Kansas City Royals (2022–2023)
Following his release from Arizona, de Geus signed with the York Revolution of the Atlantic League of Professional Baseball on June 22, 2022. The independent league provided him an opportunity to continue playing while seeking another affiliated organization. In 33 games with York, he went 2-2 with a 6.43 ERA and 31 strikeouts over 35 innings. He became a free agent after the season.
On April 21, 2023, de Geus joined the unnamed Frederick team in the Atlantic League. He appeared in five relief appearances, posting a 3.00 ERA with six strikeouts in six innings pitched. His strong performance attracted attention from an MLB organization, and on May 11, 2023, the Kansas City Royals purchased his contract and assigned him to Triple-A Omaha Storm Chasers.
De Geus spent the remainder of the 2023 season with the Royals’ minor league system, appearing in 29 games split between Triple-A Omaha and Double-A Northwest Arkansas Naturals. He combined for a 4.86 ERA with 36 strikeouts across 46 and one-third innings. He elected free agency following the season on November 6, 2023.
Seattle Mariners (2024)
On December 3, 2023, de Geus signed a minor league contract with the Seattle Mariners. He reported to Triple-A Tacoma Rainiers and made three appearances before receiving a major league call-up on April 8, 2024. He appeared in four games for the Mariners, allowing one run in three and one-third innings pitched for a 1.00 ERA. On April 22, de Geus was optioned back to Tacoma.
De Geus remained with the Triple-A Rainiers until August 2, 2024, when the Mariners designated him for assignment. His brief major league stint demonstrated solid results, but the Mariners chose to move on from his services.
Miami Marlins (2024, First Stint)
On August 5, 2024, the Miami Marlins claimed de Geus off waivers from the Mariners and optioned him to Triple-A Jacksonville Jumbo Shrimp. He was promoted to the major league roster and appeared in seven games for Miami, compiling a 6.35 ERA with four strikeouts over five and two-thirds innings. The Marlins designated him for assignment on September 10, 2024.
Toronto Blue Jays (2024)
On September 12, 2024, de Geus was claimed off waivers by the Toronto Blue Jays. He appeared in only two games for Toronto, struggling to a 15.43 ERA with one strikeout in two and one-third innings pitched. His time with the Blue Jays was brief and unsuccessful, as he allowed four earned runs in limited action.
Philadelphia Phillies and Pittsburgh Pirates (2025)
On January 10, 2025, the Blue Jays designated de Geus for assignment following the signing of Jeff Hoffman. Less than a week later, on January 15, 2025, he was traded to the Pittsburgh Pirates in exchange for cash considerations. The Pirates designated him for assignment on February 22, and five days later, on February 27, de Geus was claimed off waivers by the Miami Marlins for a second stint.
De Geus was optioned to Triple-A Jacksonville to begin the 2025 season. After a single appearance for the Jumbo Shrimp, Miami designated him for assignment on March 30. On April 1, 2025, the Philadelphia Phillies claimed de Geus off waivers, bringing him to his sixth MLB organization.
De Geus made one appearance for the Phillies on May 29, allowing one run in two innings of work against the Atlanta Braves. On July 31, he was designated for assignment following the acquisition of Harrison Bader. He cleared waivers and was sent outright to Triple-A Lehigh Valley IronPigs on August 3. On August 17, 2025, de Geus was released by the Phillies organization, ending his 2025 campaign.
Driving Style and Strengths
De Geus has primarily served as a relief pitcher throughout his professional career, specializing in short-inning appearances out of the bullpen. His ability to pitch effectively in multiple roles, including as an opener or in high-leverage situations, has contributed to his ability to stick with major league organizations despite inconsistent results. His experience spans over 100 professional appearances, providing him with a foundation of durability and adaptability that MLB teams value in middle-relief roles.
Notable Events and Milestones
De Geus reached the major leagues for the first time on April 1, 2021, with the Texas Rangers, marking the culmination of a five-year journey from junior college to MLB. His Rule 5 Draft selection by Texas represented a significant career milestone, as it demonstrated that his persistence after going undrafted in 2015 had paid off. His 2019 season with Rancho Cucamonga, where he posted a 1.75 ERA in 39 relief appearances, remains one of his strongest professional performances.
Brett de Geus Career Wins
Across parts of five MLB seasons with six different organizations, de Geus has accumulated limited but meaningful major league experience. His career has been characterized by brief MLB appearances interspersed with extended minor league stints, as he has sought to establish himself as a reliable big league contributor.
MLB Career Highlights
De Geus has appeared in 62 major league games across his career, compiling a 3-4 win-loss record with a 7.39 earned run average and 48 strikeouts. His best major league performance came during his time with the Arizona Diamondbacks in 2021, where he went 3-2 with a 6.56 ERA in 28 relief appearances. He has yet to record a save in his MLB career, with most of his appearances coming in low-leverage situations as a middle reliever.
Minor League Achievements
De Geus’s strongest professional season came in 2019 with the Rancho Cucamonga Quakes, where he earned California League All-Star honors and a spot in the Arizona Fall League as a representative of the Dodgers organization. His 2017 season at Cabrillo College, where he went 9-3 with a 1.94 ERA, established him as a professional prospect and led directly to his selection in the MLB Draft.
Brett de Geus Family
Family Background and Personal Life
Limited verified information is available regarding de Geus’s family background and personal relationships. He has maintained a private personal life throughout his professional career, with no publicly confirmed information about his family, relationships, or off-field interests.
2025 Season Performance
The 2025 season represented one of the most turbulent years of de Geus’s professional career. Beginning the year with the Toronto Blue Jays organization, he was claimed off waivers by Pittsburgh, returned to Miami, then moved to Philadelphia within a span of four months. His single appearance for the Phillies on May 29 against Atlanta provided a brief moment of major league action before he was designated for assignment, cleared waivers, and eventually released in mid-August.
De Geus’s season was defined by the challenges of being a journeyman pitcher in the modern game, where roster churn and the constant movement of players between organizations create both opportunities and instability. Despite the disruptions, he continued to report to Triple-A affiliates and perform when given the chance. His ability to keep pitches in the strike zone and work multiple innings made him a viable option for bullpen-strapped teams throughout the season.