Other hockey leagues in 1923:    
WCHL  ·  PCHA
League Champ.
Stanley Playoff
Stanley Cup
EDM Bye
Champ
OTT
1922-23 NHL Champion Ottawa Senators
z: best record, c: conference winner, y: division winner, w: wildcard, x: clinched playoff spot

League Championship

Most goals scored in 2-game series
DateAwayScoreHomeSeries
3/7 (NHL) Ottawa 2-0 Montreal (NHL) OTT 2-0
3/9 (NHL) Montreal 2-1 Ottawa (NHL) OTT 3-2
??? (PCHA) Vancouver 3-0 Victoria (PCHA) VBC 3-0
??? (PCHA) Victoria 3-2 Vancouver (PCHA) VBC 5-3

Stanley Cup Playoffs

Best of 5-game series
PCHA and NHL matchup to determine which league champion would advance to the Stanley Cup Final
DateAwayScoreHomeSeries
3/16 (NHL) Ottawa 1-0 Vancouver (PCHA) OTT 1-0
3/19 (NHL) Ottawa 1-4 Vancouver (PCHA) Tied 1-1
3/23 (NHL) Ottawa 3-2 Vancouver (PCHA) OTT 2-1
3/26 (NHL) Ottawa 5-1 Vancouver (PCHA) OTT 3-1

Stanley Cup Finals

Best of 3-game series
Champions of the NHL and WCHL competed for the Stanley Cup
DateAwayScoreHomeSeries
3/29 (NHL) Ottawa 2-1
OT
Edmonton (WCHL) OTT 1-0
3/31 (NHL) Ottawa 1-0 Edmonton (WCHL) OTT 2-0