Powell was the first foreign player in Nippon Professional Baseball (NPB) to capture 3 consecutive batting titles.

Powell served as the hitting coach of the Double-A Chattanooga Lookouts from 2002-2003 and the manager of the Single-A Dayton Dragons from 2004-2005.

On May 9, 2010, the Seattle Mariners announced that Powell would serve as the team's hitting coach, replacing Alan Cockrell.

Powell then was hired as the Assistant Hitting Coach for the San Diego Padres on November 17, 2011.

[4] On November 18, 2019, it was announced that Powell had become part of former teammate Tsuyoshi Yoda's backroom staff at the Chunichi Dragons.