Robert Eugene Robertson (born October 2, 1946) is an American former professional baseball player. He played in Major League Baseball as a first baseman between 1967 and 1979, most notably as a member of the Pittsburgh Pirates teams that won five National League Eastern Division titles in six years between 1970 and 1975 and, won the World Series in 1971. He also played for the Seattle Mariners (1978) and the Toronto Blue Jays (1979). He missed the entire 1968 season due to a kidney obstruction.