MacKenzie had served as a coach for the Astros' Gulf Coast League team since 2008. He first joined the Astros as a Minor League instructor (1999-2001) and later returned to the organization as a scout from 2004-08 before joining the Gulf Coast League club's coaching staff.
MacKenzie's distinguished career in baseball began in 1956 when he was signed as an amateur free agent by the Kansas City Athletics. MacKenzie, who was a catcher, made his Major League debut Aug. 13, 1961. He appeared in only 11 big league games, going 3-for-24.
After eight Minor League seasons as a player, he served as a Minor League manager at the Class A, Double-A and Triple-A levels for a combined 16 seasons, which included stints with the Minor League systems for Washington (1966-67), the New York Mets (1970-73), Montreal (1975-76), Kansas City (1977-79), Detroit (1983-85), San Francisco (1989) and Cleveland (1995).
MacKenzie won the Carolina League championship in 1995 and was inducted into the Kinston Professional Baseball Hall of Fame in 2005.
Brian McTaggart is a reporter for MLB.com and writes an MLBlog, Tag's Lines. Follow @brianmctaggart on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.