sentences:  Hamel retired from professional hockey in 1984, as a direct result of having sustained two serious eye injuries while playing for the Montreal Canadiens that year — the first, caused by Louis Sleigher's sucker punch during the April 20 "Good Friday Massacre", and the second, during an October 4 pre-season match.When Hamel retired, the Canadiens organization hired him as an assistant coach with their new Sherbrooke Canadiens farm team in the American Hockey League (AHL).Hamel served as an assistant coach, later head coach, during the entire six seasons that the Sherbrooke Canadiens existed as a franchise.