He graduated from Lebanon Catholic High School and West Chester State College, where he earned a bachelor's degree in health and physical education.

After a stint as a manager in Short Season-A and Class A ball, he spent 13 seasons as the Mets' roving minor league outfield and baserunning instructor.

He returned to his former post as a Rochester coach until the 2008 season, when he was promoted to roving outfield, baserunning and bunting instructor for the Twins' Double-A and Triple-A affiliates.

He began the 2009 baseball season as the hitting coach with the Twins' Single-A Midwest League affiliate, the Beloit Snappers, and was promoted to the same job with Rochester in July 2009.

In August 2011, Miller was asked to step in as acting manager for the Vancouver Canadians, the Class A short-season affiliate of the Blue Jays, when the previous skipper was forced to take a leave of absence.