Career
Duncan, who was a college teammate of Leon Lee in Sacramento, was selected by the Atlanta Braves as the 10th overall pick of the 1971 Major League Baseball Draft. A year later he was traded to the Baltimore Orioles and spent five seasons playing for Orioles-affiliated minor league clubs. In September 1977 Duncan was claimed off waivers by the Saint Louis Cardinals and made his major league debut, playing a handful of the remaining games.
In the off-season Duncan changed teams again as the Oakland Athletics selected him in the Rule 5 draft.
The 1978 season was Duncan"s last in Major League Baseball: he appeared in 104 games of the 1978 season playing mostly third base. Duncan continued to play in the minor leagues until 1980.
The obituary of The Sacramento Bee quoted a major league scout who believed that Duncan"s career had been hampered by a broken ankle he suffered early in his minor league career.