He has also served as a head coach in the NHL for the Los Angeles Kings, Montreal Canadiens, Pittsburgh Penguins and St. Louis Blues between 1978 and 1994.
In 1966 Berry joined Canada's National Hockey Team and was later signed by the Montreal Canadiens to his first professional contract in 1968 at age 25.
He spent the following year playing in the AHL for the Montreal Voyageurs and the Canadiens eventually sold his rights to the Los Angeles Kings in 1970 giving him a better opportunity to earn a spot on an NHL roster.
In 1972-73 Berry scored a career high 36 goals with the Kings and was selected to play in his first NHL All-Star game on January 30, 1973 at Madison Square Garden in New York.
[1] After retiring as a player in 1978 with the AHL's Springfield Indians, he returned to Los Angeles to become the eighth head coach in Kings history in 1978-79.
Berry eventually resigned as head coach at the end of the 1980–81 campaign after the Kings posted a 43W–24L–13T record and lost to the New York Rangers in the preliminary round.
He moved on to take the head coaching assignment in his hometown of Montreal replacing Claude Ruel behind the Canadiens bench to start the 1981–82 NHL season.
Despite winning 46 and 42 games respectively in his first two years at the helm, His Canadiens were eliminated in the first round of the Stanley Cup playoffs in 1981–82 (by the Quebec Nordiques) and in 1982–83 (by the Buffalo Sabres).
However, his post-season success, as well as the Blues,' was short lived as Berry's team was knocked out in the second round by the Toronto Maple Leafs in a hard fought 7 games series that went the distance.