He played in Major League Baseball (MLB) from 1997 to 2007 with five different teams, and was a member of the 2001 World Series champion Arizona Diamondbacks.

Through his career, Miller has also played for the Minnesota Twins, Arizona Diamondbacks (winning the 2001 World Series), Chicago Cubs and Oakland Athletics.

In May 2000, he hit the first walk-off grand slam in the history of both Chase Field and the Diamondbacks, doing so in the bottom of the 12th inning against Orel Hershiser of the Los Angeles Dodgers.

[1] In Game 7 of the 2001 World Series he played a pivotal role in the 9th inning comeback against closer Mariano Rivera.

Midre Cummings then pinch ran for Miller after Jay Bell’s failed sacrifice bunt turned fielder's choice.