Parker was head coach for Taiwan's national basketball team from 2018 to 2023. Parker was an assistant coach for the New Orleans Hornets from 2006 to 2010. His previous coaching position was at the Dallas Mavericks, where he was an assistant coach for ten seasons (1996–2005). Prior to that, he coached the USC Trojans. Parker was head coach at Wayne State from 1982 to 1988. Prior to that, he coached at Bowling Green and his alma mater, University of Findlay.