The 1950–51 NHL season was the 34th season of the National Hockey League. The Toronto Maple Leafs defeated the Montreal Canadiens four games to one for the Stanley Cup to win their fifth Cup in seven years. League business The league implemented a rule requiring all teams to provide an emergency goaltender for every game, for use by either team in case of illness or injury. Regular season The biggest trade in NHL history at the time took place in July 1950 with Sugar Jim Henry, Gaye Stewart, Bob Goldham and Metro Prystai of Chicago going to Detroit for Harry Lumley, Black Jack Stewart, Al Dewsbury, Don Morrison and Pete Babando, an exchange of nine players altogether. Joe Primeau was named coach of the Toronto Maple Leafs with Hap Day kicked upstairs to assistant general manager. Toronto came flying out of the gate, undefeated in 11 games. Al Rollins had a great year, finishing with a 1.75 goals against average in 40 games. The Leafs had hoped to have Rollins share the Vezina Trophy with Turk Broda, but the league decided Rollins alone would be the recipient. The Leafs' .679 win percentage remains their all time best for a season, despite the fact that they were second in the league standings behind Detroit. With the New York Rangers slumping this season, they hired a hypnotist, Dr. David Tracy, to help relax the team. The treatment remained in doubt and the Rangers lost to Boston November 12. Asked why the treatment didn't work, Dr. Tracy said that he should have worked with the goaltender (Chuck Rayner) as he wasn't relaxed enough. Montreal fans were excited when it was reported that two junior stars, Jean Beliveau and Bernie Geoffrion, would be given a trial in a December 16 game with the Rangers. The Canadiens played a 1–1 tie before 14,158 fans. Geoffrion scored the Canadiens goal in his debut. Chicago was in third place at mid-season when bad luck struck. Their captain, Black Jack Stewart, ruptured a disc in his back and had to undergo surgery. He was finished for the season and his career was in jeopardy. Aggravating things were injuries to Gus Bodnar and Bill Gadsby. The Black Hawks won only two games in the second half and finished last. In March, Rocket Richard ran into trouble in a game with Detroit. Richard was tripped and rose with a cut