Greg Allen Harris is an American former professional baseball pitcher, who played in Major League Baseball (MLB) for 15 years (1981–1995), Harris pitched in 703 career games, starting 98. He pitched for the San Diego Padres in the 1984 World Series, which they lost to the Detroit Tigers in five games.

In baseball, a switch-pitcher is an ambidextrous pitcher who is able to pitch with either the right or left hand from the pitcher's mound.