The 1919β20 PCHA season was the ninth season of the professional men's ice hockey Pacific Coast Hockey Association (PCHA) league. Season play ran from December 26, 1919, until March 10, 1920. The season was enlarged to 22 games per team. The Seattle Metropolitans club would place first during the regular season and then won the play-off with Vancouver Millionaires to take the PCHA championship. The Mets then played in the 1920 Stanley Cup Finals series against Ottawa Senators, National Hockey League (NHL) champions. The Senators won the best-of-five series three games to two.
At the league's annual meeting on November 21, 1919, Frank Patrick was re-elected as PCHA president.
Several players retired, including Si Griffis, Barney Stanley and Mickey MacKay of Vancouver, and Ran McDonald of Seattle. Three players from Stanley Cup champion Toronto of the NHL moved to the PCHA this season: Alf Skinner, Jack Adams and Harry Meeking.
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