Gregory Lee Riddoch (born July 17, 1945 in Greeley, Colorado) is a retired American professional baseball player, manager and coach who served as manager of the San Diego Padres of Major League Baseball from July 12, 1990 through September 22, 1992, compiling a career win-loss record of 200-194 (.508).

Riddoch threw and batted right-handed, stood 6 feet (1.8 m) tall and weighed 180 pounds (82 kg). He attended Colorado State University and the University of Northern Colorado, and was an infielder for five seasons (1967-71) in the Cincinnati Reds' organization. He spent 13 seasons as a minor league manager in the short-season Northwest League and the Rookie-level Pioneer League, and was a coach for the Padres from 1987 until the 1990 All-Star break when he succeeded Jack McKeon as the San Diego manager. He led the Padres to winning seasons in both 1991 (84-78) and 1992 (78-72), but was fired in favor of Jim Riggleman by the Padres' general manager, Joe McIlvaine, with a dozen games left in the 1992 campaign.

During his baseball career, he also served as third base coach for the Tampa Bay Devil Rays (1998-99), director of minor league clubs for the Reds (1985-86) and director of player development of the Milwaukee Brewers (2000-02). He retired in 2010 following a four-year stint as manager for the Eugene Emeralds of Northwest League, then affiliated with the Padres. Earlier in his career, when the Emeralds were a Reds' farm team, Riddoch had managed them for six seasons (1975-76; 1978-81), for a total of ten years as manager in Eugene.

[ Source: Wikipedia ]