Joseph Gregory Sparks (born March 31, 1964) is an American professional baseball coach and a former minor league player and manager.

In 2016, Sparks was named assistant hitting coach for the Chicago White Sox of Major League Baseball, a position he held through 2019.

Born in Chandler, Arizona, he is the son of Joe Sparks,[1] a retired professional baseball player, coach, manager and scout.

Greg Sparks served as a batboy for the White Sox in 1979 (when his father spent part of that year on the club's coaching staff), and was present on Disco Demolition Night.

He worked for the Oakland Athletics' organization for 19 years, beginning in 1997, as a minor league manager and hitting coordinator.