Will Brennan Bio
William Daniel Brennan is an American professional baseball outfielder who is a free agent. He has previously played in Major League Baseball (MLB) for the Cleveland Guardians, and he played college baseball for the Kansas State Wildcats. A former eighth-round draft pick, Brennan reached the major leagues in 2022 and has spent parts of four seasons in the big leagues as a versatile outfielder.
Early Life and Background
William Daniel Brennan was born on February 2, 1998, in Overland Park, Kansas, USA. He grew up in the Kansas City metropolitan area and attended Blue Valley High School in Overland Park, where he developed into a multi-sport athlete. His high school experience laid the foundation for his future in baseball, giving him the platform to attract college recruiters.
After graduating from Blue Valley High School, Brennan enrolled at Kansas State University, where he played college baseball for the Kansas State Wildcats. He spent three seasons with the program, from 2017 to 2019, working to refine his hitting, speed, and defensive skills in the outfield. The combination of high school competition and a strong Big 12 Conference college schedule helped shape his approach as a professional prospect.
Path to Professional Baseball
Brennan’s amateur career featured steady production and several notable honors. As a freshman at Kansas State, he batted .350 with 64 hits and was named second-team All-Big 12 Conference, while also earning Freshman All-American recognition from the Collegiate Baseball Newspaper and the National Collegiate Baseball Writers Association. That summer he played collegiate summer baseball with the Anchorage Glacier Pilots of the Alaska Baseball League, gaining experience against older competition.
In his sophomore season, Brennan was named first-team All-Big 12 after batting .359 with 79 hits, 49 runs scored, and 19 stolen bases. He spent the summer of 2018 with the Falmouth Commodores of the Cape Cod Baseball League, one of the most prestigious summer leagues in the country. As a junior, he batted .292 and also contributed as a pitcher, posting a 5.51 ERA in 80 innings for the Wildcats across 2018 and 2019. His combination of hitting, speed, and arm strength made him a well-rounded draft prospect.
Will Brennan Career
Minor League Development (2019–2022)
The Cleveland Indians selected Brennan in the eighth round, with the 250th overall pick, of the 2019 Major League Baseball draft. After signing, he was initially assigned to the rookie-level Arizona League Indians before being promoted to the Low-A Mahoning Valley Scrappers. He did not play in an official game in 2020 after the minor league season was canceled because of the COVID-19 pandemic, which delayed his on-field development by a full year.
Brennan began the 2021 season with the High-A Lake County Captains and batted .290 across 62 games, earning a promotion to the Double-A Akron RubberDucks. He opened the 2022 campaign with Akron and was promoted to the Triple-A Columbus Clippers after hitting .304 with 39 RBI, a mark that led the Eastern League. His steady climb through three minor league levels positioned him for a major league opportunity later that summer.
Major League Debut and Rookie Year (2022)
The Guardians selected Brennan’s contract on September 21, 2022, adding him to their active roster. He made his major league debut the same day against the Chicago White Sox, stepping into a pennant race as a late-season call-up. Brennan hit his first major league home run and triple in the same game off pitcher Max Castillo on October 2, providing an early glimpse of his offensive potential.
For the 2022 season, Brennan hit .357 with eight RBI and one home run in 42 at-bats, making the most of his limited regular-season opportunity. He appeared in five postseason games for Cleveland, batting 2-for-11 with one RBI and six strikeouts. His first taste of October baseball offered valuable experience against high-level pitching.
Sophomore Season (2023)
Brennan’s second major league season included several memorable moments. On May 22, 2023, he accidentally hit and killed a bird with a batted ball during a game against the Chicago White Sox, and the following day he hit a home run that he dedicated to the memory of the bird. On June 9, he recorded his first walkoff hit in the 14th inning of a 10-9 win against the Houston Astros, giving Cleveland a dramatic victory.
Brennan showed positional versatility for the Guardians, playing all three outfield spots during the 2023 campaign. He finished the season with a .266/.299/.356 slash line, five home runs, 41 RBI, and 13 stolen bases across 138 total games, cementing his role as a regular contributor. His combination of contact hitting, speed, and defensive flexibility made him a valuable piece of the Cleveland outfield.
Third Major League Season (2024)
Brennan made 114 appearances for the Guardians during the 2024 campaign, continuing in his role as a versatile outfielder. He hit .264/.309/.388 with eight home runs, 30 RBI, and four stolen bases, showing modest growth in power while maintaining his on-base skills. The 2024 season reinforced his reputation as a reliable everyday contributor in the Cleveland lineup.
Final Year in Cleveland (2025)
Brennan was optioned to Triple-A Columbus to begin the 2025 season. On May 12, 2025, he was recalled by the Guardians, and he went 1-for-11 with one walk over six appearances for the team. Brennan underwent a season-ending reconstruction of his left ulnar collateral ligament on June 9, a significant injury that ended his year. On September 6, it was announced that he had undergone an additional surgery to correct a lingering groin injury. On November 21, he was non-tendered by the Guardians and became a free agent.
Driving Style and Strengths
At the plate, Brennan is a contact-oriented hitter who uses the entire field and puts the ball in play with regularity. He is a plus runner who adds value on the base paths with smart aggression and the ability to steal bases. Defensively, his arm and range have allowed him to play all three outfield positions, giving his managers flexibility in late-game situations.
Notable Events and Milestones
Among Brennan’s signature moments are his major league debut on September 21, 2022, and his first home run and triple in the same game off Max Castillo on October 2, 2022. His walkoff hit in the 14th inning against the Houston Astros on June 9, 2023, stands out as one of the most dramatic moments of his career. Reaching free agency after the 2025 season marks another major milestone as he prepares for the next chapter of his professional journey.
Will Brennan Career Wins
Will Brennan is a contact-driven outfielder whose value comes from consistent at-bats, defensive versatility, and baserunning rather than from overwhelming power. Across his major league tenure with the Cleveland Guardians, he has delivered multi-season contributions as a regular in the outfield. The sections below summarize his verified performance at each stage of his professional career.
Major League Highlights
Brennan made his major league debut on September 21, 2022, against the Chicago White Sox and wasted little time making an impact. He collected his first major league home run and triple in the same game off Max Castillo on October 2, 2022, and went on to bat .357 in 42 regular-season at-bats that year. Across his major league career with Cleveland, he has produced a .260s batting average with steady on-base numbers, modest home run totals, and double-digit stolen base totals in his most active seasons.
Minor League and Amateur Performances
In the minors, Brennan advanced steadily from Low-A to Triple-A, batting .290 in 62 games at High-A Lake County in 2021 and .304 with 39 RBI at Double-A Akron in 2022 before his promotion to Columbus. As an amateur at Kansas State, he earned All-Big 12 honors in each of his first two seasons, including a .359 average with 19 stolen bases as a sophomore. He also gained experience in elite summer leagues, playing for the Anchorage Glacier Pilots and the Falmouth Commodores of the Cape Cod Baseball League.
Will Brennan Family
Family Background and Racing Lineage
Public information about William Daniel Brennan’s immediate family is limited. He grew up in Overland Park, Kansas, and developed his baseball skills in the Kansas City metropolitan area before heading to Kansas State University. There is no widely verified public information about parents or siblings in the available sources.
Personal Life
Details about Brennan’s personal life beyond his professional baseball career are not publicly documented in the available sources. He is known by the nickname connected to his social media presence, but verified information about a spouse, partner, or children has not been published. His residence during the offseason has not been confirmed in available reporting.
2025 Season Performance
Brennan’s 2025 season was defined by injury and a difficult road back. He was optioned to Triple-A Columbus to begin the year and was recalled by the Guardians on May 12, 2025. In six major league appearances after his recall, he went 1-for-11 with one walk before a left UCL reconstruction ended his season on June 9. A subsequent surgery in September addressed a lingering groin issue, adding to a long rehabilitation timeline.
On November 21, 2025, Brennan was non-tendered by the Guardians and became a free agent, opening the next chapter of his career. With a return to health, he is expected to seek an opportunity where his contact hitting, outfield versatility, and baserunning can fit a major league roster. His outlook heading into 2026 depends heavily on his recovery from UCL reconstruction, but his track record of multi-position defense and steady offensive production gives him a clear path back to a big league clubhouse.