The Tigers had some trouble signing
Joe Malone from the Quebec days, but he finally did sign. The Tigers were awarded two players from the Senators,
Punch Broadbent and
Sprague Cleghorn by NHL president Calder, but both refused to sign with the Tigers, and eventually returned to the Senators. Cleghorn was awarded to the Toronto St. Patricks and at first balked at the move, but did report. After the St. Patricks were defeated in the NHL playoffs, Cleghorn joined Ottawa in a deal. NHL president Frank Calder did not like this and the following season a trading deadline was instituted. The Tigers stunned the Canadiens 5–0 in the team's first-ever game with
Babe Dye starring and
Howard Lockhart getting the only shutout of his NHL career. The
Toronto St. Patricks lost
Corbett Denneny to injuries and recalled Dye from Hamilton, giving them Mickey Roach in his place.
Corbett Denneny scored six goals in a game January 26, 1921, helping the Toronto St. Patricks to wallop the Hamilton Tigers 10–3.
Cy Denneny wasn't about to let his brother steal the thunder and he scored six goals himself in a March 7 game as the Ottawa Senators hammered the Hamilton Tigers 12–5. For the first time, a brother combination had scored six goals in a game the same season. Also on January 26, 1921, the Ottawa Senators left the ice with 5:13 to play in a game against the Montreal Canadiens. According to the Senators, referee Cooper Smeaton was one-sided in favour of the Canadiens. Smeaton let the Canadiens continue to play, allowing goals by Newsy Lalonde and Amos Arbour before calling the game. Smeaton denied the claim, stating "a referee is always paid and receives the same salary, regardless what team wins." Smeaton would resign over the incident, but was convinced to return to refereeing later in the season. The Senators were fined $500 by NHL president Frank Calder for the incident. The
Ottawa Senators won the first half of the split season while the
Toronto St. Patricks won the second half.
Final standings ==Playoffs==