The championship trophy of the NHA was the O'Brien Cup, made of solid silver, donated by the O'Brien family. It survived as the championship trophy of the NHL until the Western Hockey League, the successor to the PCHA, folded after the 1925–26 hockey season. This left the NHL as the only professional league that competed for the Stanley Cup. Thus starting in 1926–27 season, the Stanley Cup became the championship trophy of the NHL. The O'Brien Trophy was then awarded annually as an NHL trophy afterward before being retired in 1950.