Roof was out of town on a recruiting trip Saturday and was unavailable for further comment. There was no timetable for finding a replacement, school spokesman Art Chase said.
Under Galbraith, Duke (2-9, 1-7 Atlantic Coast Conference) ranked near the bottom of the league's offensive categories. Duke averaged a league-low 16.6 points and 265.5 yards per game. The Blue Devils also ranked last with 94 yards rushing - the only ACC school with less than 100 yards per game - and next-to-last in passing at 171 yards.
Galbraith came to the Blue Devils after spending the 2003 season as tight ends coach for the NFL's Arizona Cardinals. Prior to that, he spent three seasons with North Carolina State, serving as offensive coordinator in 2001 and '02.
The 2002 team, led by future NFL first-round draft pick Philip Rivers, set school records with 5,486 total yards and 460 points on the season.
Galbraith also had collegiate coaching stops at Wake Forest, Georgia Tech, Purdue, Louisiana State and Marshall. In the professional ranks, he had stints with the USFL's Tampa Bay Bandits and Arizona Outlaws, and spent the 1985 season with the NFL's Kansas City Chiefs.