Quick Facts
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Biography
Brandon Sean Michael Brennan (born July 26, 1991) is an American professional baseball pitcher for the Seattle Mariners of Major League Baseball (MLB).
Career
Amateur career
Brennan attended Capistrano Valley High School in Mission Viejo, California. The Colorado Rockies selected Brennan in the 40th round of the 2010 MLB draft, but Brennan did not sign. Brennan attended the University of Oregon as a freshman in 2011, but took a redshirt and did not play for the Oregon Ducks. Brennan chose to transfer from Oregon, but as he did so too late to be eligible for a Division I school, he transferred to Orange Coast College for his 2012 sophomore season. In 15 games (14 starts) at OCC in 2012, Brennan went 11-1 with a 1.25 ERA.
Professional career
Minor leagues
The Chicago White Sox selected Brennan in the fourth round, with the 141st overall selection, of the 2012 MLB draft. Brennan signed with the White Sox for a $320,800 signing bonus. After signing, he debuted with the Great Falls Voyagers of the Rookie-level Pioneer League, pitching to a 3–2 win-loss record with a 4.34 earned run average (ERA) in 37 innings pitched. In 2013, he pitched for the Kannapolis Intimidators of the Class A South Atlantic League, going 4–9 with a 5.53 ERA in 81 innings. Brennan spent 2014 with Great Falls, Kannapolis, and the Winston-Salem Dash of the Class A-Advanced Carolina League. He combined to go 5–1 with a 2.91 ERA in 66 innings. He spent 2015 with Winston-Salem, going 3–4with a 3.55 ERA in 58 innings. The Chicago White Sox added Brennan to their 40-man roster after the 2015 season.
Brennan spent 2016 with Winston-Salem and the Birmingham Barons of the Double-A Southern League, going a combined 3–12 with a 6.79 ERA in 102 innings. He spent the 2017 season with Birmingham and the Charlotte Knights of the Triple-A International League, going a combined 2–2 with a 4.68 ERA in 59 ⁄3 innings. In 2018, he again split the season between Birmingham and Charlotte, combining to go 5–4 with a 3.25 ERA in 74 ⁄3 innings.
Brennan became a free agent after the 2018 season. He signed a minor-league contract with the Colorado Rockies in November.
Seattle Mariners
The Seattle Mariners identified Brennan as a player to target when their analytics department identified improvements in Brennan's changeup. At the Winter Meetings in December 2018, they selected Brennan with the 13th pick in the Rule 5 draft. Brennan made the Seattle Mariners's 2019 Opening Day roster. Brennan made his major league debut on March 21, 2019, pitching a scoreless eighth inning.