He has previously played in MLB for the Texas Rangers, Milwaukee Brewers, Los Angeles Dodgers, New York Mets and Seattle Mariners.
In 2013, as a senior, he has a 6–0 win–loss record with a 0.19 earned run average (ERA) as a pitcher for the school's baseball team.
[8][9] Miller signed with Chicago and spent his first professional season with the Arizona League Cubs and Eugene Emeralds,[1] going 2–1 with a 3.14 ERA in 28+2⁄3 innings.
[15] On August 17, 2020, Miller was promoted to the major leagues, and made his MLB debut that day against the St. Louis Cardinals, pitching two innings and giving up two runs.
[18] He was assigned to the Triple-A Round Rock Express, and made one appearance for the team, allowing two runs in three innings of work.
[21] In his only appearance, against the Houston Astros, Miller took the loss after allowing six runs on four hits and two walks in two-thirds of an inning.
[23] On September 27, Miller relieved Jesús Tinoco in a game against the Seattle Mariners, and tossed 3+2⁄3 scoreless innings to earn his first career win.
[28] On July 12, 2023, Miller was traded to the Los Angeles Dodgers in exchange for cash considerations.
[34] He appeared in one game during this stint with the team, pitching two scoreless innings against the Arizona Diamondbacks on August 29 before being designated for assignment again the next day.