Before the 2004 season, Mills was named to the job reuniting with Red Sox manager Terry Francona, his former teammate and roommate at the University of Arizona. Mills and Francona also played together with the Montreal Expos (1981-83), and Mills served as Francona's first-base coach with the Philadelphia Phillies (1997-2000). Mills, who served as an advance scout for the Chicago Cubs, also managed eleven season in the minors in the Cubs, Rockies and Dodgers organizations (1987-2002), and was the first base coach with the Expos in 2003.
Mills reached the major leagues in 1980 and went on to hit a .256 batting average with one home run and 12 RBI in 106 games played for the Expos (1980-83). He divided his time between Triple-A and the majors in each of those seasons, and sustained a right knee injury that ended his playing career at the age of 29. A left-handed hitter and primarily a third baseman, he also saw time at first base and second. Brad's son Beau Mills, was the Cleveland Indians first round draft pick in the 2007 MLB Draft., who played first base for the Lake County Captains and Kinston Indians.
- Mills became forever a part of major league history, when in 1983 he was Nolan Ryan's 3,509th career strikeout victim, lifting Ryan past Walter Johnson as all-time strikeout leader.
- Baseball Reference - Career statistics and analysis
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