Gregory Lee Walker
- Bats Left, Throws Right
- Height 6' 3", Weight 205 lb.
- High School Coffee High School (Douglas)
- Debut September 18, 1982
- Final Game July 1, 1990
- Born October 6, 1959 in Douglas, GA USA
Greg Walker spent most of his career with the Chicago White Sox after being selected from the Philadelphia Phillies in the 1979 Rule V Draft. He was the club's starting first baseman for several seasons and hit 27 home runs in 1987. During batting practice on July 30, 1988, he suffered a life-threatening seizure. After missing the remainder of the season, he returned to the field in 1989. In 1990, he joined the Baltimore Orioles and ended his big league career with them.