Ronnie Dwayne Gideon (born January 13, 1964, at Tyler, Texas) is an American professional baseball coach and manager. In 2013, he will be the development supervisor of the Colorado Rockies' Short Season-A affiliate, the Tri-City Dust Devils. In February 2013, the Rockies announced an innovation to their minor league system, appointing a development supervisor at all levels of their organization; his role is to "work with the manager, staffs and players to make sure that the Rockies' development philosophies are being carried out and communication and team building take place."
In his playing days (1984–1990), Gideon was a first baseman and pitcher in the minor league organizations of the Philadelphia Phillies and New York Mets. He batted .250 over his career — slugging 25 home runs in his best season, 1987 with the Class A Lynchburg Mets — and losing four of five decisions with an earned run average of 2.97 on the mound. He threw and batted left-handed, standing 6 feet 2 inches (1.9 m) tall and weighing 200 pounds (91 kg).
Gideon became a coach and instructor in the Mets' system after his retirement as a player, and managed in the minor leagues from 1993–2005, joining the Rockies' system in 1996. He managed at every level but Triple-A before moving to the field coordinator of instruction post for the Rockies in 2006. On May 29, 2009, Gideon was also named manager of the Tulsa Drillers of the Double-A Texas League, part of a chain reaction of promotions in the Rockies' organization that followed the firing of Colorado pilot Clint Hurdle. Hurdle was replaced by Jim Tracy as Colorado's MLB manager, Triple-A skipper Tom Runnells became Tracy's bench coach, Tulsa manager Stu Cole took over Runnells' Colorado Springs Sky Sox, and Gideon took the reins in Tulsa.
Gideon now lives in Hallsville, Texas with his family.
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- Minor league playing and managing record, from Baseball Reference