Mark Dwayne Ryal (born April 28, 1960) is an American former professional baseball player who played six seasons for the Kansas City Royals, Chicago White Sox, California Angels, Philadelphia Phillies, and Pittsburgh Pirates of the Major League Baseball (MLB). He also played two seasons in the Nippon Professional Baseball (NPB) for the Chunichi Dragons. He is the father of Rusty Ryal, an infielder for the Arizona Diamondbacks.