Gregory Lee Riddoch (born July 17, 1945) is an American former 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).
During his baseball career, Riddoch 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).
[4] He retired in 2010 following a four-year stint as manager for the Eugene Emeralds of Northwest League, then affiliated with the Padres.
Former Padres' outfielder Tony Gywnn, one of the greatest hitters of his generation, called his former coach "one of the best teachers ever of the game.