Donald Ross McCormack (born September 18, 1955 in Omak, Washington) is a former professional baseball player and coach. He was a fourth round draft pick in the 1974 Major League Baseball Draft, by the Philadelphia Phillies. On September 30, 1980, the 25-year-old McCormack made his major league debut with the Phillies. However, he would end up playing only 5 games total in the majors (in 1980 and 1981 with the Phillies), while spending most of nine years playing in the minor leagues in the Philadelphia and Detroit Tigers farm systems.
In September 2005, McCormack reached a milestone, posting his 800th win as a manager. The Ducks' manager position was taken over by Dave LaPoint, a former major league pitcher, on November 28, 2006. Bud Harrelson later took his place. As a result of this transition, McCormack became the team's bench coach.