As coach Gregory Lee Walker (born October 6, 1959) is an American former professional baseball first baseman.

He was called up to the major leagues in 1982 and spent almost his entire MLB playing career with the White Sox.

[2] He was released by Chicago early in the 1990 season and subsequently signed with the Baltimore Orioles.

[3] When he began his coaching career, he did so with the White Sox Triple-A club in Charlotte.

After nine seasons serving as the hitting coach of the Chicago White Sox, including their victory in the 2005 World Series, it was announced on October 21, 2011, that Walker was hired by the Atlanta Braves to serve as their hitting coach for the 2012 season.