Greg Stefan was a goaltender who shared netminding duties with Glen Hanlon during the 1986-1987 and 1987-1988 seasons, when the Detroit Red Wings reached the Stanley Cup conference finals in back-to-back campaigns.
Stefan began his coaching career in 1993 with the Detroit Jr. Red Wings of the Ontario Hockey League in 1993, and contributed to the team's first OHL championship in 1995.
After moving around the Hurricanes system as a scout, and even as an assistant coach, Stefan returned to Plymouth in December 2007 to become the head coach of the club, taking over for Mike Vellucci, who would solely focus on his general manager duties.
Stefan came back to Plymouth for a second season in 2008–09, however, after a start of 6–11–2, he resigned from the position to return to the Carolina Hurricanes organization as a scout.
In 2006, Stefan won the Stanley Cup as goalie coach and scout with the Carolina Hurricanes.