Douglas Reagan Ault (March 9, 1950 – December 22, 2004) was an American professional baseball first baseman and designated hitter who played for the Texas Rangers (1976) and Toronto Blue Jays (1977–1978, 1980). He is best known for hitting the first two home runs in Blue Jays history, in the team's first Major League Baseball (MLB) game on April 7, 1977, a 9–5 Toronto win against the Chicago White Sox.