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,
Calder Memorial Trophy individual voter ranks their top five candidates on a 10–7–5–3–1 points system. Three finalists are named and the trophy is awarded at the NHL Awards ceremony after the playoffs. Calder Memorial Trophy The Calder Memorial Trophy is an annual award given "to the player selected as the most proficient in his first year of competition in the National Hockey League (NHL)." It is named after Frank Calder, the first president of the NHL. Serving as the NHL's Rookie of the Year award, this version of the trophy has been awarded since its creation for the 1936–37 NHL season. The voting