Presidents' Trophy Prior to 1926–27, the Stanley Cup was then awarded as a "World Series" trophy between the champions of the NHL and a rival league (first the Pacific Coast Hockey Association, then the Western Canada Hockey League). Instead, the NHL championship trophy during this era was the O'Brien Trophy. From 1917–18 to , the NHL season was split, requiring separate standings, with a single playoff series between the winner of the first half of the season and the winner of the second half of the season. After the 1925–26 season, the NHL became the only league left competing for the Stanley
Edinburgh Trophy of Canada. On the sides of the base, there were small plaques to inscribe the winning team's name. The winners were to be considered the "World's Minor Professional Champions". At the same time, the terms of the championship were announced. The two leagues would play off annually, alternating in the east and the west. The first playoff would be held in the city of the champion of the Western Hockey League. All contested series were best-of-nine format. Edinburgh Trophy The Edinburgh Trophy was a trophy given to the winners of a series played between the champions of the Western Hockey