Mark William Davis (born October 19, 1960) is an American former professional baseball pitcher.
Davis played in Major League Baseball (MLB) for the Philadelphia Phillies (1980–1981, 1993), San Francisco Giants (1983–1987), San Diego Padres (1987–1989, 1993–1994), Kansas City Royals (1990–1992), Atlanta Braves (1992), and Milwaukee Brewers (1997).
He won the National League Cy Young Award in 1989, as a relief pitcher for the Padres.
Davis batted and threw left-handed.
He was the Minor League Pitching Coordinator for the Kansas City Royals organization, but stepped aside after the 2011 season to coach a single short-season affiliate in 2012.