Major professional sports leagues in the United States and Canada to compete, with the provision that the Stanley Cup winners were to be recognized as "World's Champions". The phrase was repeatedly engraved on the Cup, and continued to be used, when the NHL began admitting American franchises. When the NHL assumed formal control of the Cup in 1947, the resulting agreement required "that the winners of this trophy shall be the acknowledged World's Professional Hockey Champions" (in contrast to the IIHF's Ice Hockey World Championships, at the time contested only by amateurs). When the World Hockey Association commenced play in the 1970s, they sought to challenge for the Stanley Cup,
Hart Memorial Trophy The Hart Memorial Trophy is named in honour of Canadian Dr. David Hart. Dr. Hart, who donated the original trophy to the NHL, was the father of Cecil Hart, a former Coach and General Manager of the Montreal Canadiens. The trophy was first awarded at the conclusion of the 1923–24 NHL season to Frank Nighbor of the Ottawa Senators. The original "Hart Trophy" was retired to the Hockey Hall of Fame in 1960, and the NHL began presenting a new trophy, which was dubbed the "Hart Memorial Trophy" in its place. With the exceptions of Tommy Anderson, Al Rollins, and